Patent Publication Number: US-2017349371-A1

Title: Arrangement for releasably securing containers

Description:
TECHNICAL FIELD 
     The invention relates to an arrangement for releasably securing a plurality of standard-sized containers together. Furthermore the invention relates to anchoring and aligning the containers. 
     BACKGROUND 
     This section illustrates useful background information without admission of any technique described herein being representative of the state of the art. 
     The present invention aims to mitigate the problems of the previous solutions by providing an arrangement that can be used to build a cost effective high performance securing arrangement for a plurality of containers. 
     Recent trends toward globalization have hastened the adoption of certain standards to facilitate the exchange of goods. In particular, container-based freight transport allows shippers to manage transport of standard sized containers, with little or no regard from what they might contain. The International Organization for Standardization (ISO) has been a leader in the development and adoption efforts of such containers. The ISO maintains standards of such general purpose and specific purpose containers, available online at www.iso.org. According to the ISO, millions of freight containers are now in service throughout the world. Assurances that shippers will handle such large volumes of standard sized containers, has allowed shippers to invest in infrastructure that is largely tailored to such standard sized containers. 
     ISO containers, or containers complying with ISO-standards have fittings in corners of the container to enable lifting and handling the container. 
     The fittings for the top and bottom corners of containers provide compatibility in interchange between transportation modes. The size and configuration of corner fitting apertures are specified. The faces of the corner fittings having apertures for the engagement of handling and securing devices have specified thickness and tolerances. The thickness of the blank walls is not specified since they are not involved in the engagement of the handling and securing devices, provided that their inner surfaces do not protrude into the corner fitting cavity reserved for the engaging devices. 
     Under the ISO standards, there are five common standard lengths, 20 ft, 40 ft, 45 ft, 48 ft, and 53 ft. Container capacity is often expressed in twenty-foot equivalent units (TEU). For air transport, the International Air Transport Association (IATA) has created a similar set of standards for aluminum container sizes designed for aircraft and associated ground handling equipment. One of the benefits of such intermodal containers is that they can be loaded at one location and delivered to a destination by various modes (e.g., ship, rail, truck) without having to open the containers. 
     During transportation or storing a plurality of containers, reliable and effective solutions are required. Thus there is a need to releasibly secure the containers together and provide advanced solutions for floating containers. 
     SUMMARY 
     Various aspects of examples of the invention are set out in the claims. 
     According to a first example aspect of the present invention, there is provided an arrangement for releasably securing a plurality of standard-sized containers together, the arrangement comprising: 
     at least two planar securing elements comprising an aperture and at least two extension elements emerging from a surface of the planar securing element, each extension element configured to be attachable to at least one container; 
     a first elongated securing element extending across at least two adjacent containers; 
     wherein a first planar securing element is configured to attach to a first container using at least one extension element of the first planar securing element, and a second planar securing element is configured to attach to a second container using at least one extension element of the second planar securing element, and the elongated securing element extending through apertures of the first and the second planar securing element and tightenably engaged to the first and the second planar securing element. 
     In an embodiment, the arrangement further comprises: 
     a frame element arranged externally to at least one container, wherein the frame element comprising extension element configured to be attachable to at least one container. 
     In an embodiment, the arrangement further comprises: 
     a frame element arranged externally to at least one container, wherein the frame element comprising extension element configured to be attachable to at least one planar securing element. 
     In an embodiment, the first elongated securing element comprising a vertical or a horizontal elongated securing element extending across at least two adjacent containers. 
     In an embodiment, the first elongated securing element comprising at least one of a bar and a cable wire. 
     In an embodiment, the arrangement further comprises: a tightening element configured to adjust length of the first elongated securing element to enable tightenable engagement of the first elongated securing element to the first and the second planar securing element. 
     In an embodiment, the arrangement further comprises: 
     a second elongated securing element extending across at least one container, wherein the second elongated securing element being a diagonal securing element extending diagonally across at least one container. 
     In an embodiment, the arrangement further comprises: 
     a third elongated securing element extending across at least two containers, wherein the third elongated securing element comprising a first part and a second part, the first part and the second part being connected to each other in a position not overlapping an interface of the at least two containers. 
     In an embodiment, the third elongated securing element is configured to be attachable to the at least two containers in a position not overlapping an interface of the at least two containers. 
     In an embodiment, the arrangement further comprises: 
     a floating element attached to at least one first elongated securing element extending across at least one container, wherein the floating element configured to provide floating effect for the at least one container. 
     In an embodiment, the arrangement further comprises: an anchor device for anchoring the at least one floating container. 
     In an embodiment, the arrangement further comprises: 
     a flexible element arranged between the anchor device and the at least one floating container, the flexible element configured to provide resilience for anchoring; 
     and an elongated connection element configured to connect the anchor device and the flexible element. 
     In an embodiment, the flexible element is attached to at least one of the elongated securing element, the planar securing element, the frame element and the container. 
     In an embodiment, the flexible element is configured to stretch or squeeze in response to an external force being directed to the flexible element. 
     In an embodiment, the flexible element comprises at least one of the following: a spring element, an elastic element, a pneumatic cylinder and a hydraulic cylinder. 
     In an embodiment, the elongated connection element comprising at least one of a bar, a rod, a chain and a cable wire. 
     In an embodiment, the flexible element is adjustable in response to control input. 
     In an embodiment, the arrangement further comprises: 
     a support element arranged between the anchor device and the at least one floating container; and 
     an elongated connection element configured to connect the anchor device and the support element, wherein the support element is configured to direct forces affecting to an upper end of the elongated connection element over a wider area of the support element instead of a single attachment point of the elongated connection element. 
     In an embodiment, the arrangement further comprises: 
     an alignment element arranged to external surface of at least one of the elongated securing element, the planar securing element, the frame element and the container, the alignment element having form designed for form-fitting engagement with a counterpart alignment element to precisely position the floating container with another floating container or a dock. 
     In an embodiment, the alignment element is configured to position the floating container in at least one of a vertical dimension and a horizontal dimension. 
     According to a second example aspect of the present invention, there is provided method for releasably securing a plurality of standard-sized containers together, the method comprising: 
     arranging at least two planar securing elements comprising an aperture and at least two extension elements emerging from a surface of the planar securing element, each extension element configured to be attachable to at least one container; 
     extending a first elongated securing element across at least two adjacent containers; 
     attaching a first planar securing element to a first container using at least one extension element of the first planar securing element; 
     attaching a second planar securing element to a second container using at least one extension element of the second planar securing element; 
     extending the elongated securing element through apertures of the first and the second planar securing element; and 
     engaging tightenably the elongated securing element to the first and the second planar securing element. 
     Different non-binding example aspects and embodiments of the present invention have been illustrated in the foregoing. The embodiments in the foregoing are used merely to explain selected aspects or steps that may be utilized in implementations of the present invention. Some embodiments may be presented only with reference to certain example aspects of the invention. It should be appreciated that corresponding embodiments may apply to other example aspects as well. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a more complete understanding of example embodiments of the present invention, reference is now made to the following descriptions taken in connection with the accompanying drawings in which: 
         FIGS. 1 a - c    illustrate exemplary planar securing elements  1  of an arrangement according to an embodiment of the invention; 
         FIG. 2  illustrates an exemplary first elongated securing element extending across at least two adjacent containers according to an embodiment of the invention; 
         FIG. 3  illustrates an exemplary tightening element according to an embodiment of the invention; 
         FIG. 4  illustrates an exemplary two-wire solution according to an embodiment of the invention; 
         FIG. 5  illustrates an exemplary cross support solution according to an embodiment of the invention; 
         FIG. 6  illustrates another exemplary cross support solution according to an embodiment of the invention; 
         FIG. 7  illustrates a wrench attachment element according to an embodiment of the invention; 
         FIG. 8  illustrates another wrench attachment element according to an embodiment of the invention; 
         FIG. 9  illustrates an example arrangement for releasably securing a plurality of standard-sized containers together according to an embodiment of the invention; 
         FIG. 10  illustrates another example arrangement for releasably securing a plurality of standard-sized containers together according to an embodiment of the invention; 
         FIG. 11  illustrates an example arrangement for a frame element arranged externally to at least one container according to an embodiment of the invention; 
         FIG. 12  illustrates another example arrangement for a frame element arranged externally to at least one container according to an embodiment of the invention; 
         FIG. 13  illustrates an example of an additional support element included within the arrangement according to an embodiment of the invention; 
         FIG. 14  illustrates another example of an additional support element included within the arrangement according to an embodiment of the invention; 
         FIG. 15  illustrates a detailed example of a head of an additional support element included within the arrangement according to an embodiment of the invention; 
         FIG. 16  illustrates another detailed example of a head of an additional support element included within the arrangement according to an embodiment of the invention; 
         FIG. 17  illustrates an example of an extension element comprising a slot according to an embodiment of the invention; 
         FIG. 18  illustrates an example arrangement comprising at least one support frame being installed according to an embodiment of the invention; 
         FIG. 19  illustrates an example embodiment, wherein a floating element is attached according to an embodiment of the invention; 
         FIG. 20  illustrates some example embodiments for using floating elements according to an embodiment of the invention; 
         FIG. 21  shows anchoring solutions according to embodiments of the invention; 
         FIG. 22  shows a flexible element solution according to an embodiment of the invention; 
         FIG. 23  shows a control system according to an embodiment of the invention; 
         FIG. 24  illustrates alignment arrangement according to an embodiment of the invention; 
         FIG. 25  illustrates another alignment arrangement according to an embodiment of the invention; 
         FIG. 26  shows a flow diagram showing operations in accordance with an example embodiment of the invention; 
         FIG. 27  presents an example block diagram of a sensing device in which various embodiments of the invention may be applied; 
         FIG. 28  shows a schematic picture of a system according to an example embodiment of the invention; 
         FIG. 29  presents an example block diagram of a controlling device in which various embodiments of the invention may be applied; and 
         FIG. 30  presents a schematic drawing of an arrangement in which various embodiments of the invention may be applied. 
     
    
    
     DETAILED DESCRIPTION OF THE DRAWINGS 
     The present invention and its potential advantages are understood by referring to the drawings. In this document, like reference signs denote like parts or steps. 
       FIGS. 1 a - c    illustrate exemplary planar securing elements  1  of an arrangement according to an embodiment of the invention. 
     In an embodiment, there is provided an arrangement for releasably securing a plurality of standard-sized containers together, the arrangement comprising, as shown in  FIG. 1 a   , a planar securing element  1  comprising an aperture  3  and at least two extension elements  2  emerging from a surface of the planar securing element  1 , each extension element  2  configured to be attachable to at least one container. 
     In an embodiment, there is provided an arrangement for releasably securing a plurality of standard-sized containers together, the arrangement comprising a planar securing element  1  comprising an aperture  3  and only one extension element  2  emerging from both surfaces of the planar securing element  1 , each extension element  2  configured to be attachable to at least one container. 
     In an embodiment, at least one of the extension elements  2  of the planar securing element  1  may be removable and exchangeable. Thus the planar securing element  1  may comprise, for example, apertures that can be used for inserting selective and exchangeable extension elements  2  based on need and used containers. Sizes and forms of the exchangeable extension element external parts matching to at least one container may also vary, depending on the container. 
     In an embodiment, as shown in  FIG. 1 b   , a planar securing element  1  comprising an aperture  3  and more than two extension elements  2  emerging from a surface of the planar securing element  1 , each extension element  2  configured to be attachable to at least one container. 
     In an embodiment, as shown in  FIG. 1 c   , a planar securing element  1  comprising an aperture  3  and more than two extension elements  2  emerging from both surfaces of the planar securing element  1 , each extension element  2  configured to be attachable to at least one container. Two-sided arrangement of extension elements could be implemented also for the securing elements  1  of  FIGS. 1 a   - b.    
     The securing element  1  may be arranged so that at least two extension elements  2  of the securing element are fitted to corner fittings of two adjacent containers, for example. 
     In an embodiment, two extension elements  2  may be used for attaching two adjacent containers together. Four extension elements  2  may be used for attaching four adjacent containers together via the corner fittings of the containers. 
     In an embodiment, if containers are stacked on top of each other, extension elements  2  may be used in both sides of the planar securing element  1 . 
     The shape of the extension elements  2  may be formed so that the extension elements engage reliably to corner fittings of the containers. The shape may change depending on the standardized corner fitting shape of the container of use. 
     In an embodiment, the extension element  2  may comprise a rotating or turning upper end so that when engaged to the corner fitting of the container, the upper end contacts with the internal wall surface within the corner fitting element to enable more reliable engagement between the extension element  2  and the corner fitting. 
     In an embodiment, the planar securing element  1  may comprise a corner plate type of structure, wherein the securing element may be place over the corner of at least one container and extending on two surface, and two corner fitting apertures of the container. 
     In an embodiment, further planar securing elements  1  may be used that do not comprise aperture  3  at all. 
       FIG. 2  illustrates an exemplary first elongated securing element  4  extending across at least two adjacent containers according to an embodiment of the invention. 
     A first planar securing element  1  is configured to attach to a first container using at least one extension element  2  of the first planar securing element  1 , and a second planar securing element is configured to attach to a second container using at least one extension element of the second planar securing element as shown in  FIG. 2 . The elongated securing element  4  extending through apertures of the first and the second planar securing element  1  and tightenably engaged to the first and the second planar securing element  1 . 
     In an embodiment, the first elongated securing element  4  may comprise a vertical or a horizontal elongated securing element extending across at least two adjacent containers. The first elongated securing element  4  may comprise at least one of a bar and a cable wire. 
     In an embodiment, the arrangement may further comprise a tightening element  21  configured to adjust length of the first elongated securing element  4  to enable tightenable engagement of the first elongated securing element  4  to the first and the second planar securing element  1 . 
     In an embodiment, the arrangement may further comprise a second elongated securing element extending across at least one container, wherein the second elongated securing element being a diagonal securing element extending diagonally across at least one container. 
     The planar securing elements  1  may be installed to the arrangement horizontally and/or vertically. When installed, the securing elements  1  provide horizontal and/or vertical lines to enable installations of the first elongated securing element(s)  4 . The first elongated securing element(s)  4  may squeeze the upper and lower planar securing element towards each other to ensure tight engagement. Correspondingly the first elongated securing element(s)  4  may squeeze the left and right planar securing element towards each other to ensure tight engagement in horizontal dimension. 
     In an embodiment, a tightening element  21  may be configured to move longitudinally in view of the first elongated securing element  4  to provide tightening mechanism. The tightening mechanism may comprise threads on an outer surface of the elongated element  4 , such as a bar, and a nut matching the threads. In case the first elongated securing element  4  comprising a cable wire, a threaded element may be attached to the cable wire and the cable wire can be squeezed or tightened with a matching nut. 
     In an embodiment, tightening element  21  may comprise at least one turnbuckle. The turnbuckle comprises coupling device consisting of two eyelets or other connection points connected in screw threads. The joint in between can be turned to shorten or lengthen the device with mechanical advantage provided by the screw threads. When the elongated securing element  4  shortens due to the tightening element  21  that causes the tightening of the planar securing elements  1  and the extension elements  2  against the containers. 
       FIG. 3  illustrates an exemplary tightening element  21  according to an embodiment of the invention. 
     In  FIG. 3  on the left hand side, threads  21 A are illustrated in one end of the elongated securing element  4  and a nut  21 B may be tightened in such a way that the planar securing element moves in response to the nut  21 B moving along the threads. Threads may be arranged in both ends of the elongated securing element  4  or only to one end and the other being attached without threads, for example. In right hand side on  FIG. 3 , there is a thread part  22 A attached to a cable wire  4  comprising threads on external surface and matching to the nut  22 B. Tightening occurs in a same way as on the left hand side embodiment. 
     In an embodiment, the elongated securing element  4 , such as a bar or a cable wire, is defined for a certain length, depending how many layers in vertical or horizontal direction of consecutive containers is secured to each other. 
     In case of a plurality of layers, the planar securing elements  1  between the container layers are in line between the lowest and the highest planar securing element  1 . In this way it is easy to tighten the containers against each other via the tightening mechanism comprising at least one tightening element  21 . The tightening mechanism effects on all containers in same line via the lowest and the highest planar securing element  1 . 
       FIG. 4  illustrates an exemplary two-wire solution according to an embodiment of the invention. 
     Two cable wires  5  may be used. 
     A first end of each cable wire  5  is attached, for example, to top corner fittings of a container  6 A, such as an ISO container, using for example hooks arranged in the ends of the cable wires  5 . The cable wires  5  may be fed diagonally through the holes of the planar securing elements  1  and after that vertically upwards. In this way cross support may also be achieved. Arrows indicate the direction for pulling the wires  5  to enable tightening effect. 
       FIG. 5  illustrates an exemplary cross support solution according to an embodiment of the invention. 
     In an embodiment, the arrangement may comprise a second elongated securing element  7  extending across at least one container, wherein the second elongated securing element  7  being a diagonal securing element extending diagonally across at least one container. 
     In an embodiment, the diagonally extending second elongated securing elements  7  may be attached to the corner fittings of the container in diagonal directions. The diagonally extending second elongated securing elements  7  provide cross support and they may be of a pre-defined length and in the end of the diagonally extending second elongated securing element  7 , a wrench attachment element may be arranged to enable attachment to the corner fitting of the container  6 B.  FIG. 5  illustrates only pillars  6 B,  6 C,  6 D,  6 E of the container. 
       FIG. 6  illustrates another exemplary cross support solution according to an embodiment of the invention. 
     In an embodiment, the arrangement may comprise a second elongated securing element  7  extending across at least one container, wherein the second elongated securing element  7  being a diagonal securing element extending diagonally across at least one container. 
     In an embodiment, the diagonally extending second elongated securing elements  7  may be attached to the corner fittings of the container in diagonal directions. The diagonally extending second elongated securing elements  7  provide cross support and they may be of a pre-defined length and in the end of the diagonally extending second elongated securing element  7 , a wrench attachment element may be arranged to enable attachment to the corner fitting of the container. 
       FIG. 6  illustrates only pillars  6 F,  6 G,  6 H,  6 I of the container. 
     In an embodiment, a diagonally extending second elongated securing element  7  may also be attached to some other part than to the corner fitting of the container. For example, the diagonally extending second elongated securing element  7  may be attached to the supporting structure of the container, or to some other supporting frame. The first end of the diagonally extending second elongated securing element  7  may thus be attached to a corner fitting and the second end to the supporting structure, or even both ends being attached to the supporting structure. 
       FIG. 7  illustrates a wrench attachment element  700  according to an embodiment of the invention. 
     The wrench attachment element  700  may be arranged to enable attachment of a diagonally extending second elongated securing element  7  to the container.  FIG. 7  shows and example embodiment, wherein in an end of the diagonally extending second elongated securing element  7  there is an aperture  8  and wrench attachment element  700  further comprises a support element  10 C that is arranged through the aperture  8  and the corner fitting of the container. Furthermore the wrench attachment element  700  comprises a fastener element  9 A,  9 B,  9 C that is rotatably arranged to the support element  10 C. For example, the fastener element  9 A,  9 B,  9 C may be attached to a corner of the container and it comprises a fastening flange  9 B, a fastener rod  9 A, and a wrench element  9 C, such as hex head, in the end of the rod  9 A. The support element  10 C may comprise a through hole  10 B for the fastener rod  9 A and a support head  10 A that corresponds to the corner fitting  6  (see  FIG. 4 ) aperture of the container. The apertures  8 ,  10 B and the fastener rod  9 A are threaded. 
       FIG. 8  illustrates another wrench attachment element  13  according to an embodiment of the invention. 
     The wrench attachment element  13  of  FIG. 8  comprises a first attachment flange  14  and a second attachment flange  15  that is rotatably arranged in view of the diagonally extending second elongated securing element  11 . The second attachment flange  15  can be rotated against the surface of the diagonally extending second elongated securing element  11  when the wrench attachment element  13  is placed to the aperture  12  of the diagonally extending second elongated securing element  11 . Thus attachment of the diagonally extending second elongated securing element  11  to a corner fitting  6  of the container is enabled. 
     In an embodiment, the corner fitting  6  may be arranged to each of the eight corners of the container. The corner fitting may comprise an essential twistlock fitting for hoisting, stacking, and securing. 
       FIG. 9  illustrates an example arrangement  900  for releasably securing at least two standard-sized containers together. In arrangement of  FIG. 9 , two containers are secured from their heads. 
     The arrangement  900  comprises at least two planar securing elements  1  comprising an aperture  3  and at least two extension elements  2  are emerging from a surface of the planar securing element  1 , each extension element configured to be attachable to at least one container. A first elongated securing element  4 , for example a rod or a wire, extends across at least two adjacent containers. A first planar securing element is configured to attach to a first container using at least one extension element of the first planar securing element, and a second planar securing element is configured to attach to a second container using at least one extension element of the second planar securing element, and the elongated securing element  4  extends through apertures of the first and the second planar securing element and is tightenably engaged to the first and the second planar securing element. 
     In an embodiment, a rod  4  can be guided vertically through apertures  3  of the planar securing plates  1 . When the plates  1  are tightened with the tightening mechanism, the containers or layers of containers are squeezed against each other. Extension elements  2  of the planar securing element  1  tie adjacent containers together. In outer corners of the secured combination of at least two containers there may be further attachment elements arranged, such as wrench attachment elements, as disclosed earlier in this description. As can be seen in  FIG. 9 , all corners may comprise a planar securing element  1  and either by cable wires or rods the securing effect may be accomplished, as discussed. For improved stability or strength, cross support elements  7  can be used. 
       FIG. 10  illustrates another example arrangement for releasably securing a plurality of standard-sized containers together according to an embodiment of the invention. In arrangement of  FIG. 10 , six containers are secured in two rows, two columns and two layers. 
     The arrangement  1000  comprises at least two planar securing elements comprising an aperture and at least two extension elements are emerging from a surface of the planar securing element, each extension element configured to be attachable to at least one container. A first elongated securing element, for example a rod or a wire, extends across at least two adjacent containers. A first planar securing element is configured to attach to a first container using at least one extension element of the first planar securing element, and a second planar securing element is configured to attach to a second container using at least one extension element of the second planar securing element, and the elongated securing element extends through apertures of the first and the second planar securing element and is tightenably engaged to the first and the second planar securing element. 
     In an embodiment, a rod can be guided vertically through apertures of the planar securing plates. When the plates are tightened with the tightening mechanism, the containers or layers of containers are squeezed against each other. Extension elements of the planar securing element tie adjacent containers together. In outer corners of the secured combination of at least two containers there may be further attachment elements arranged, such as wrench attachment elements, as disclosed earlier in this description. 
     As can be seen in  FIG. 10 , if placing the planar securing elements and the elongated securing element, such as a rod or a wire to the middle point of the 2×2×2 matrix of containers, at least eight containers can be secured to each other very easily. For improved stability or strength, cross support elements can be used. 
     In an embodiment, as disclosed throughout the description and different embodiments, a container  1010  may comprise a closed container, such as an ISO-container with walls on each side of the container. The container  1010  may also comprise an open container, such as an ISO-container without any walls on any side of the container but only the supporting structure, such as the frames or bars defining a container outline, such as an ISO-container. The container may also comprise something between those two alternatives, wherein there are some walls within the container but at the same time comprise at least one open wall. 
       FIG. 11  illustrates an example arrangement for a frame element  16 A arranged externally to at least one container according to an embodiment of the invention. 
     The frame element  16 A may be arranged externally to at least one container, wherein the frame element comprising extension element  16 D configured to be attachable to at least one container or securing element. 
     In an embodiment, the frame element  16 A may be used instead of the diagonal securing element extending diagonally across at least one container that was disclosed earlier. The extension elements  16 D are attached in the corner fittings  6  of the container or securing element. The frame element  16 D comprises bars  16 B and between the bars  16 B cross support bars are arranged. 
     In an embodiment, the frame element  16 D may be placed on any side of the container, on top or below, in a corresponding way as the earlier discussed diagonal securing elements (element  7  in  FIG. 5 , for example) extending diagonally across at least one container. 
       FIG. 12  illustrates another example arrangement for a frame element  16 A arranged externally to at least one container according to an embodiment of the invention. 
     The frame element  16 A comprises vertical extension element  16 D configured to be attachable to at least one container or securing element. 
     In an embodiment, the extension elements  16 D are attached in the corner fittings of the container or the securing element. The frame element  16 D comprises vertical bars  16 B and between the bars  16 B there are diagonal cross support bars  16 C. 
       FIG. 13  illustrates an example of an additional support element  17  included within the arrangement according to an embodiment of the invention. 
     In an embodiment, further support elements may be needed. In that case, at least one additional support element  17  with a pre-defined length may be added. Such additional support element  17  may be attached between two corners of at least one container, as illustrated in  FIG. 13 . In both ends of the additional support element  17  there are apertures  17 A suitable for an elongated securing element, such as a bar or a wire, or for an extension element of a planar securing element, for example. 
       FIG. 14  illustrates another example of an additional support element  17  included within the arrangement according to an embodiment of the invention. 
     In an embodiment, a plurality of support elements  17  may be needed. In that case, at least one additional support element  17  with a pre-defined length may be added to the shorter side of the container and at least one additional support element  17  with a pre-defined length may be added to the longer side of the container. Such additional support elements  17  may be attached between two corners of at least one container, as illustrated in  FIG. 14 . In both ends of the additional support element  17  there are apertures  17 A suitable for an elongated securing element  4 , such as a bar or a wire, or for an extension element  2  of a planar securing element  1 , for example. 
       FIG. 15  illustrates a detailed example of a head of an additional support element  17  included within the arrangement according to an embodiment of the invention. 
     In an embodiment, a head of the additional support element  17  comprises an aperture that fits with an extension element  2  of a planar securing element  1 . Furthermore, a corner fitting  6  comprises an aperture that fits with the extension element  2  of the planar securing element  1 . When placing the additional support element  17  between the planar securing element  1  and the container and aligning the corner fitting  6  aperture facing downwards, the aperture of the additional support element  17  and the extension element  2  of the planar securing element  1 , and installing the planar securing element  1  to the direction indicated by the arrow in  FIG. 15 , reliable and easy to use engagement is achieved. 
       FIG. 16  illustrates another detailed example of a head of an additional support element  17  included within the arrangement according to an embodiment of the invention. 
     In an embodiment, a head of the additional support element  17  comprises an aperture  17 B that fits with an extension element  2  of a planar securing element  1 . As can be seen, a planar securing element  1  comprising only one extension element  2  on each surface can be used. 
       FIG. 17  illustrates an example of an extension element  2  comprising a slot  18  according to an embodiment of the invention. 
     In an embodiment, an extension element  2  may comprise a slot  18 . Such slotted extension element  2  are especially useful in situations, when the arrangement comprises a diagonally extending second elongated securing element attached to corner fitting apertures and wherein a head of the diagonally extending second elongated securing element comprises an attachment element  20 , such as a pin. The attachment element  20  comprises a second slot  20 A in an external end of the element  20  in view of the diagonally extending second elongated securing element. The second slot  20 A is arranged to match the corresponding slot  18  of the extension element  2  when installed together. 
     In an embodiment, the extension elements  2  may be arranged as separate elements to extension apertures  19  of the planar securing element  1 . This enables changing of the slotted extension elements  2  based on different setups and sizes of used components, for example. 
       FIG. 18  illustrates an example arrangement  1800  comprising at least one support frame being installed according to an embodiment of the invention. 
     In an embodiment, the arrangement  1800  comprises at least one support frame  23 ,  24 ,  25  arranged on at least one side of a container. In a corner of the support frame  23 ,  24 ,  25  there is arranged a planar securing element  1  and at least one of its extension elements  2  matches an aperture arranged in the corresponding corner of the support frame  23 ,  24 ,  25 . Alternatively, the extension elements may be implemented to the corner of the frame  23 ,  24 ,  25  and matching to an aperture of the planar securing element  1 , for example. 
     In an embodiment, at least one support plate  26  may be arranged to the support frame  23 ,  24 ,  25 . 
       FIG. 18  further illustrates an example embodiment, wherein planar securing element  1  comprising extension elements  2  and an aperture  3 , and an elongated securing element  4  can be used for securing at least one container or several containers. In this embodiment, the horizontal planar securing elements  1  are squeezed against the container(s), wherein also other planar securing elements  1  in same line between the containers are squeezed against the container(s). Securing of containers may be carried out similarly in both vertical and horizontal dimensions. 
       FIG. 19  further illustrates an example embodiment, wherein a floating element may be attached according to an embodiment of the invention. 
     The floating element  28  may be attached to at least one first elongated securing element extending across at least one container, wherein the floating element  28  is configured to provide floating effect for the at least one container. 
     In an embodiment, the floating element  28  may be attached to the arrangement using an attachment element  27 . The container can be placed above the floating element  28  and attach to other containers using embodiments disclosed earlier. By doing this, it is possible to provide bigger rafts or bridges comprising a plurality of containers, for example. The floating element  28  may thus be used as a base for the container securing arrangement disclosed in previous embodiments. 
     In an embodiment, the attachment element  27  may extend at least over two corners of a container and comprises extension elements  2  and apertures  3  in preferred locations to match the corner fittings of the container. The attachment element  27  may extend over a plurality of containers. 
     In an embodiment, the floating element  28  may comprise a container part  28 A and a lid part  28 B that may be attached with each other. By having this kind of parts it is possible to store or transport the floating elements  28  when not used. 
       FIG. 20  illustrates some example embodiments for using floating elements according to an embodiment of the invention. 
     A raft or a bridge arranged using floating containers as shown, wherein a part of the floating elements are below the surface  29  of the water. The floating elements  28  may be placed under each container  6 A or only under selected containers, for example. The floating elements may be arranged to different directions as well in view of the containers  6 A, as illustrated in the two different embodiments of  FIG. 20 . 
       FIG. 21  shows anchoring solutions according to an embodiment of the invention. 
     Waves may cause remarkable forces for floating arrangements, such as floating containers when anchored, especially on greater sea areas. Because of this, attention is needed to be paid for anchoring chain, rope or similar and especially its upper attachment to the floating arrangement. 
     As shown in  FIG. 21 , an arrangement may further comprise an anchor device  216  for anchoring the at least one floating container. 
     In an embodiment, different supporting elements  211 ,  212 ,  213 ,  214  may be arranged between the anchor device  216  and the at least one floating container. 
     An elongated connection element  215  is configured to connect the anchor device  216  and the support element  211 ,  212 ,  213 ,  214 , wherein the support element  211 ,  212 ,  213 ,  214  is configured to direct forces affecting to an upper end of the elongated connection element  215  over a wider area of the support element  211 ,  212 ,  213 ,  214  instead of a single attachment point of the elongated connection element  215 . The attachment point can correspond, for example, to a loop, whereto an anchor cable could be attached. 
     In an embodiment, the support element  211 ,  212 ,  213 ,  214  may be attached to a container by welding or using securing arrangements disclosed in this description, for example. 
     Having duplicate support elements  211 ,  212 ,  213 ,  214  in  FIG. 21  illustrates the possibility stack several containers on top of each other or place them next to each other and secured together. 
     In an embodiment, the support element  211 ,  212 ,  213 ,  214  may be larger than a single container and cover several containers. In such case the support element  211 ,  212 ,  213 ,  214  may be attached to several containers. The support element  211 ,  212 ,  213 ,  214  may also comprise support plates  211 A,  211 B. 
     In an embodiment, the support element may comprise, for example, a bar  211 , a frame  212 ,  213  or a structure  214 . 
     In an embodiment, the elongated connection element  215  may comprise at least one of a bar, a rod, a chain and a cable wire. The anchoring device  216  may also comprise a pole attached to bottom of the sea, for example. 
       FIG. 22  shows a flexible element solution according to an embodiment of the invention. 
     The support element or the securing arrangement may also comprise a flexible element  2112 - 5  arranged between the anchor device  216  and the at least one floating container  217 , the flexible element  2112 - 5  configured to provide resilience for anchoring. An elongated connection element  215  is configured to connect the anchor device  216  and the flexible element  2112 - 5 . 
     The flexible element may be attached to at least one of the elongated securing element, the planar securing element, the frame element and the container. The flexible element is configured to stretch or squeeze in response to an external force being directed to the flexible element, due to, for example, a moving vessel, waves, flow, tidewater, changing level of surface, or wind. 
     In an embodiment, the flexible element may comprise a spring element  2113  that is arranged within an elongated and hollow bar, as shown in  FIG. 22 . The spring element  2113  is connected to a pole  2114 , which is connected via a loop  2115  to the elongated connection element  215 . 
     The spring element  2113  may also comprise an elastic element, a pneumatic cylinder and a hydraulic cylinder. 
     The flexible element is configured to stretch or squeeze, due to waves, for example, and the raft or other floating device in question, is arranged to move in vertical dimension allowed by the flexibility range of the flexible element. Due to the flexible element, the load and force directed to the support element or the attachment point can be reduced. 
     In an embodiment, the arrangement further comprises a support element  2112  arranged between the anchor device  216  and the at least one floating container  217 , and an elongated connection element  215  is configured to connect the anchor device  216  and the support element  2112 , wherein the support element  2112  is configured to direct forces affecting to an upper end of the elongated connection element  215  over a wider area of the support element instead of a single attachment point of the elongated connection element. 
     In an embodiment, the flexible element  2112 - 5  is adjustable in response to control input. The control input may be based on a control system. 
       FIG. 23  shows a control system according to an embodiment of the invention. 
     The flexible element may be controlled by a control system  2300  as illustrated in  FIG. 23 . 
     In an embodiment, a control device  3 ′ is configured to control the status of a first flexible element  202  based on control input, by adjusting hydraulic, pneumatic, electric, or electromagnetic element  202 , depending on its implementation. At least one sensor  5 ′ may be utilized in the system  2300  and the sensor  5 ′ may be arranged in communication connection with the control device  3 ′ to transceive sensor data to the control device  3 ′ over data communication interface. The sensor  5 ′ may comprise, for example, a movement sensor, a pressure sensor or a water depth sensor. The sensor  5 ′ may be located in the floating element  7 , such as a container. 
     In an embodiment, based on the control input generated by the control device  3 ′ and received by the controllable flexible element  202 , the controlled amount C 2  of cable, chain or rope  5  is allowed to extend in water. In case the floating element, such as the container, is anchored using several arrangements as disclosed above, and the location of the floating device (container) is wanted to be changed C 3 , a second control device  3 ′ enables that. The control device  3 ′ may be configured to control some other flexible element, such as pole-based anchoring. 
     In an embodiment, the system  2300  may comprise a central controller  8 ′ for controlling at least one control device  3 ′ associated with a certain controllable flexible element over data communication interface. The interface may be wireless or wired. The central controller  8 ′ can also be connected over data communication interface to an external data network  9 ′,  10 ′ either to monitor the central controller  8 ′ operation or to provide remote control for the central controller  8 ′. Any control device  3 ′ for flexible element  202  may also be connected to the network  9 ′,  10 ′ to transceive measurement data and/or control data between the central controller  8 ′ and the control device  3 ′. Any sensor  5 ′ can also be attached to the network  9 ′,  10 ′ fro transceiving sensor data to the control device  3 ′, for example. 
     In an embodiment, the system  2300  may also comprise a second flexible element  70  that is connected to a second control device  2 ′. The second control device  2 ′ may be configured to receive data of the relative movement of the floating devices  7  (e.g. containers). The relative movement data may be generated using a second sensor, such as a movement sensor  4 ′,  6 ′,  7 ′ that senses, for example, movement of the waves  203 . The second sensor may be located, for example, in a floating device  7  (e.g. container) or in a buoy  204 . The buoy  204  may be arranged to a certain distance D from the floating device (e.g. container), so that any control device  2 ′,  3 ′,  8 ′ has enough time to generate control input data for the flexible element  70 ,  202  before the waves  203  reach the flexible element (e.g. container). Control input adjusts C 1  how much the chain or cable  80  flexes or squeezes and how much of it is between the floating devices  7  (e.g. containers). The second sensor  4 ′,  6 ′ may also comprise a position sensor, a strain sensor, or such. 
     In an embodiment, a flexible element may be arranged between any two adjacent containers. Furthermore, each flexible element may be controllable based on control input. 
     In an embodiment, all sensors, control device, central controller and the controllable flexible elements of the system  2300  may communicate over local data communication interface or via the network  9 ′,  10 ′ with each other. Thus, it is possible to move at least floating device  7  (e.g. container, or combination of containers), vertically, horizontally or even rotatably on the surface of water by controlling one or more controllable flexible elements  70 ,  202 . 
       FIG. 24  illustrates alignment arrangement  2400  according to an embodiment of the invention. 
     In an embodiment, the arrangement may comprise an alignment element  6 X,  6 Y arranged to external surface of at least one of the elongated securing element, the planar securing element, the frame element and the container, the alignment element  6 X,  6 Y having form designed for form-fitting engagement with a counterpart alignment element  6 Y,  6 X to precisely position the floating container  2403  with another floating container  2404  or a dock. 
     In an embodiment, the alignment element  6 X,  6 Y is configured to position the floating container  2403 ,  2404  in at least one of a vertical dimension and a horizontal dimension. 
     In an embodiment, the arrangement  2400  may comprise at least one floating device  2403 ,  2404  (e.g. container) that is to be secured to another floating device or to a ground device (e.g. in harbor). The arrangement comprises at least one flexible element  2407  operationally connected with a cable, wire, rope or chain  2408 , for example. Furthermore, the arrangement  2400  comprises alignment elements  6 X,  6 Y for aligning the floating devices  2403 ,  2404  with each other, or for aligning a floating device  2403  with a ground device  2404 , for example. 
     In  FIG. 24  there are two flexible elements  2407  showed but it is possible to use only one flexible element  2407  as well. 
     In an embodiment, the alignment elements  6 X,  6 Y comprise at least one extension element  6 X and at least one recess element  6 Y arranged in counterpart devices  2403 ,  2404 . The shapes of the alignment elements  6 X,  6 Y may vary, as far as they match with each other and provide alignment effect. 
       FIG. 25  illustrates another alignment arrangement  2500  according to an embodiment of the invention. 
     In an embodiment, a plurality of floating devices  2503  (e.g. containers) is secured with each other. A flexible element  2507  is arranged on the ground  2562 , as shown, above the water level  2561 . The combination of the floating devices  2503  is shown in state where the combination of the floating devices  2503  is with a distance from the shore. However, using the alignment arrangement  2500 , the floating combination  2503  can be aligned to the shore and form a pier, for example. Alignment elements are arranged in the floating device and to another floating device or to ground. The flexible element may be configured to be resilient. The floating device  2503  may be pulled towards the shore using a cable, a wire, a chain or similar  2508  that is attached to an attaching element  2512  and operated manually or by a motor, for example. Another end of the floating device  2503  may be anchored using a chain, cable, wire or such  2504  and an anchoring device  2505 . Also the length of the chain or such  2504  may be adjusted manually or automatically by a motor, for example. The arrangement may also comprise a sensor and a control device to determine sensing data from the sensor and generate control data by the control device based on the sensing data and operate automatically some motor to move the floating device  2503  based on control input determined based on the control data. 
       FIG. 26  shows a flow diagram showing operations in accordance with an example embodiment of the invention. 
     In step  2600 , the method for releasably securing a plurality of standard-sized containers together is started. In step  2610 , at least two planar securing elements comprising an aperture and at least two extension elements emerging from a surface of the planar securing element are arranged, each extension element configured to be attachable to at least one container. In step  2620 , a first elongated securing element is extended across at least two adjacent containers. In step  2630 , a first planar securing element is attached to a first container using at least one extension element of the first planar securing element. In step  2640 , a second planar securing element is attached to a second container using at least one extension element of the second planar securing element. In step  2650 , the elongated securing element is extended through apertures of the first and the second planar securing element. In step  2660 , the elongated securing element is engaged tightenably to the first and the second planar securing element. In step  2670 , method ends. 
       FIG. 27  presents an example block diagram of a sensing device  2700  in which various embodiments of the invention may be applied. The sensing device  2700  may comprise various means for activity data detection and environmental data detection, for example. The sensing device  2700  may be used for example for container movement, status of any securing element of the arrangement, forces generated to some part or element of the arrangement, length of any cables or wires, rotating speeds of any motor used, movements of any containers as well as for environmental data, such as wind, waves, temperature and so on. 
     In an embodiment, the sensing device  2700  may comprise at least one of the following devices: an accelerometer; an inclinometer; an angular velocity sensor; a pressure or weight sensing sensor; a transceiver for receiving weather information and/or topography information; a camera; a global navigation satellite system (GNSS) device; an anemometer for providing wind information; a wind sensor for providing wind information; a sensor for providing flute height information; a barometer for measuring air pressure; a temperature sensor for measuring environmental temperature; a water depth sensor for measuring depth information; a chart plotter for providing position information; a speed sensor for providing speed information; a video camera for providing a video signal; and a compass for providing direction information. 
     In an embodiment, a wind sensor  2700  is configured to determine or measure wind angle and wind speed. The wind sensor  2700  may comprise any element of combination of elements operable to sense wind-related information for use by a controlling device. For example, the wind sensor  2700  may be operable to sense apparent wind speed, apparent wind angle, true wind speed, true wind angle, wind velocity made good (VMG), combinations thereof, and the like. 
     In an embodiment, a video camera  2700  is configured to provide video signal. Based on the video signal the controlling device may determine at least part of the environmental data. For example flute height may be determined based on the video signal from the video camera  2700 . The determination may be done by video image processing, pattern recognition, measuring a rocking movement or relative movement of a horizon, for example. 
       FIG. 28  shows a schematic picture of a system  2800  according to an example embodiment of the invention. The system  2800  may comprise a plurality of satellites  2810  in orbit about the Earth. The orbit of each satellite  2810  is not necessarily synchronous with the orbits of other satellites and, in fact, is likely asynchronous. A global positioning system receiver apparatus such as the ones described in connection with preferred embodiments of the present invention is shown receiving spread spectrum global positioning system (GNSS) satellite signals  2812  from the various satellites  2810 . 
     A container, such as a floating container  2820  of one of a plurality of containers may comprise a controlling device that may be an integrated controlling device, or for example, a mobile phone, an Internet tablet, a mobile terminal or a laptop computer, for example. The controlling device  2821  is capable of downloading and locally executing software program code. The software program code may be a client application of a service whose server application is running on the server apparatus  2830  of the system  2800 . The controlling device  2821  may comprise a sensing device  2822 , such as an environmental and current activity data capturing element, such as an accelerometer, a compass, a wind sensor, a barometer, a GNSS receiver and a flute height sensor, for example. The controlling device  2821  is configured to be connectable to a wireless communication network  2840  over a wireless connection  2824 . The wireless connection  2824  may comprise a mobile cellular network or a wireless local area network (WLAN), for example. The wireless communication network may be to a public data communication network  2850 , for example the Internet, over a data connection  2841 . 
     In an embodiment, the controlling device  2821  may be comprised in the container  2820 , in a sensing device  2822  or located external to the container  2820 , for example in a user device  2860 , or in the server  2830 ,  2831  connectable to the container  2820  over network connection  2824 ,  2823 ,  2812 , for example. 
     In an embodiment, external control information may be received by a controlling device  2821  and controlling commands are generated based on the external control information and the sensing signal provided by at least one sensing device  2822  by a controlling device  2821 . 
     In an embodiment, the system  2800  comprises a computer apparatus  1460  configured to be connectable to the controlling device  2821  over a data connection  2823 . The computer apparatus  2860  may be connected to a public data communication network  2850 , for example the Internet, over a data connection  2861 . 
     In an embodiment, the system  2800  comprises a server apparatus  2830 , which comprises a storage device  2831  for storing container  2820  related data, such as control data, command data, external control information, history data, weather information, and profile data, for example, over data connection  2851 . 
       FIG. 29  presents an example block diagram of a controlling device in which various embodiments of the invention may be applied. The controlling device  2821  may be a user equipment (UE), user device or apparatus, such as a mobile terminal, a smart phone or other communication device. 
     The general structure of the controlling device  2821  comprises a user interface  2940 , a communication interface  2950 , a satellite positioning device (GNSS)  2970 , a sensing device  2960 , a processor  2910 , and a memory  2920  coupled to the processor  2910 . The controlling device  2821  further comprises software  2930  stored in the memory  2920  and operable to be loaded into and executed in the processor  2910 . The software  2930  may comprise one or more software modules and can be in the form of a computer program product. The controlling device  2821  may further comprise a user interface controller  2980 . 
     The processor  2910  may be, e.g., a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a graphics processing unit, or the like.  FIG. 29  shows one processor  2910 , but the controlling device  2821  may comprise a plurality of processors. 
     The memory  2920  may be for example a non-volatile or a volatile memory, such as a read-only memory (ROM), a programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), a random-access memory (RAM), a flash memory, a data disk, an optical storage, a magnetic storage, a smart card, or the like. The controlling device  2821  may comprise a plurality of memories. The memory  2920  may be constructed as a part of the controlling device  2821  or it may be inserted into a slot, port, or the like of the controlling device  2821  by a user. The memory  2920  may serve the sole purpose of storing data, or it may be constructed as a part of an apparatus serving other purposes, such as processing data. A proprietary activity application, activity data and environmental data may be stored to the memory  2920 . 
     The user interface controller  2980  may comprise circuitry for receiving input from a user of the controlling device  2821 , e.g., via a keyboard, graphical user interface shown on the display of the user interfaces  2940  of the controlling device  2821 , speech recognition circuitry, or an accessory device, such as a headset, and for providing output to the user via, e.g., a graphical user interface or a loudspeaker. 
     The satellite positioning device  2970  is configured to provide location information. Such information may comprise, for example, position coordinates, speed, and direction of movement. 
     The communication interface module  2950  implements at least part of data transmission. The communication interface module  2950  may comprise, e.g., a wireless or a wired interface module. The wireless interface may comprise such as a WLAN, Bluetooth, infrared (IR), radio frequency identification (RF ID), GSM/GPRS, CDMA, WCDMA, or LTE (Long Term Evolution) radio module. The wired interface may comprise such as universal serial bus (USB) or National Marine Electronics Association (NMEA) 0183/2000 standard for example. The communication interface module  2950  may be integrated into the controlling device  2821 , or into an adapter, card or the like that may be inserted into a suitable slot or port of the controlling device  2821 . The communication interface module  2950  may support one radio interface technology or a plurality of technologies. The controlling device  2821  may comprise a plurality of communication interface modules  2950 . 
     A skilled person appreciates that in addition to the elements shown in  FIG. 29 , the controlling device  2821  may comprise other elements, such as microphones, extra displays, as well as additional circuitry such as input/output (I/O) circuitry, memory chips, application-specific integrated circuits (ASIC), processing circuitry for specific purposes such as source coding/decoding circuitry, channel coding/decoding circuitry, ciphering/deciphering circuitry, and the like. Additionally, the controlling device  2821  may comprise a disposable or rechargeable battery (not shown) for powering when external power if external power supply is not available. 
     In an embodiment, the controlling device  2821  comprises speech recognition means. Using these means, a pre-defined phrase may be recognized from the speech and translated into control information for the controlling device  2821 , for example. 
     The satellite positioning device  2970  and the sensing device  2960  may be configured to be comprised by the controlling device  2821  or connected as separate devices to the controlling device  2821 . In case the satellite positioning device  2970  and the sensing device  2960  are comprised in the controlling device  2821  they may be connected to the controlling device  2821  using an internal bus of the controlling device  2821 . In case the satellite positioning device  2970  and the sensing device  2960  are external devices connected to the controlling device  2821  they may be connected to the controlling device  2821  using communication interface  2950  of the controlling device  2821  or using the internal bus. 
     In an embodiment, not all elements of the controlling device  2821  are necessary, such as user interface controller  2980 , user interface  2940 , or positioning device  2970 , for example. 
       FIG. 30  presents a schematic drawing of an arrangement in which various embodiments of the invention may be applied. 
     In an embodiment, anchoring of at least one container  3007  is arranged using anchoring poles  5 A that are attached to an anchoring device  3006 A in the bottom of a sea, a lake or similar. The anchoring poles  5 A may move within and in relation to upper attachment arrangement  27 A that may comprise, for example, a hollow element, a loop or such, to enable movement of the anchoring pole  5 A through it. The upper attachment arrangement  27 A are secured to at least one support element  150  that is secured to the floating element, such as a container  3007 . 
     In this embodiment, two containers  3007  attached to each other may form a floating device. A flexible element  151  may be used also when using anchoring poles  5 A to absorb, for example, effects of the waves. The flexible element  151  may be connected to the support element  150  and to the upper attachment arrangement  27 A. By this way, the upper attachment arrangement  27 A may be fixedly attached to the anchoring pole  5 A. The attachment may be achieved via welding, for example. The flexible element  151  may be configured to absorb movement caused by the waves within the floating device comprising at least one container  3007 , for example. The flexible element  151  may comprise any previously discusses flexible element, such as a spring, an elastic element such as a rubber element, a hydraulic element, a pneumatic element, an electric element or an electromagnetic element, for example. The flexible element is configured to stretch or squeeze in response to an external force being directed to the flexible element, due to, for example, a moving vessel, waves, flow, tidewater, changing level of surface, or wind. 
     Without in any way limiting the scope, interpretation, or application of the claims appearing below, a technical effect of one or more of the example embodiments disclosed herein is an improved solution for securing containers together. Further technical effect is an easy to use solution that is quick to install and low-cost. Still further technical effect is improving floating containers. Even further technical effect is reliable and durable anchoring of floating containers. Even further technical effect is improved alignment of floating containers with each other or to the shore. 
     Although various aspects of the invention are set out in the independent claims, other aspects of the invention comprise other combinations of features from the described embodiments and/or the dependent claims with the features of the independent claims, and not solely the combinations explicitly set out in the claims. 
     It is also noted herein that while the foregoing describes example embodiments of the invention, these descriptions should not be viewed in a limiting sense. Rather, there are several variations and modifications, which may be made without departing from the scope of the present invention as defined in the appended claims. 
     The invention has been explained above with reference to the aforementioned embodiments, and several advantages of the invention have been demonstrated. It is clear that the invention is not only restricted to these embodiments, but comprises all possible embodiments within the spirit and scope of the inventive thought and the following patent claims.