Abstract:
Sonar imagery captured during a trip on a body of water can be played back to users, forming a trip replay. However, since the depth of the body of water varies drastically over the course of the trip, the resulting sonar image captured and played over the trip replay may result in loss of detail near shallow depths (even though such detail was captured and is available). Embodiments of the present invention seek to provide the ability to zoom in on portions of the sonar image during trip replay. Additionally, further zoom features, such as bottom lock and canopy lock, provide additional functionality.

Description:
FIELD OF THE INVENTION 
       [0001]    Embodiments of the present invention relate generally to sonar systems and, more particularly, to systems, assemblies, and associated methods for adjustable range viewing of sonar imagery during trip replay. 
       BACKGROUND OF THE INVENTION 
       [0002]    Sonar (SOund Navigation And Ranging) has long been used to detect waterborne or underwater objects. For example, sonar devices may be used to determine depth and bottom topography, detect fish, locate wreckage, etc. Sonar beams, from a transducer assembly, can be transmitted into the underwater environment. The sonar signals reflect off objects in the underwater environment (e.g., fish, structure, sea floor bottom, etc.) and return to the transducer assembly, which converts the sonar returns into sonar data that can be used to produce an image of the underwater environment. 
         [0003]    In some instances, it may be difficult to discern underwater features, particularly when a long track of sonar imagery is played back. Applicant has developed methods and systems detailed herein to improve viewing capabilities of the resulting sonar images. 
       BRIEF SUMMARY OF THE INVENTION 
       [0004]    Sonar system users often want the ability to gather and replay (review) sonar data that was received along an entire trip on a body of water (e.g., trip replay). Notably, the sonar image shown on the screen accounts for the entire range of possible depths of the body of water traveled. However, since the depth varies drastically over the course of the trip, the resulting sonar image played during the trip replay may result in loss of detail near shallow depths. For example, sonar detail between 0 feet and 5 feet (such as for shallow water) may not be visible because the entire range of depths accounts for the depth at the middle of the lake (e.g., 100 feet). In this regard, even though the detail between 0 feet and 5 feet was captured when the watercraft was in the shallow water, it is not discernible during trip replay because the depth range goes to at least 100 feet (to account for displaying sonar imagery when the trip replay gets to the portion of the trip when the watercraft was in the middle of the lake). Embodiments of the present invention seek to provide the ability to zoom in on portions of the sonar image during trip replay. Additionally, further zoom features, such as bottom lock and canopy lock, provide additional functionality. 
         [0005]    In an example embodiment of the present invention, an apparatus is provided. The apparatus comprises a processor and a memory including computer program code stored thereon, the memory and the computer program code are configured to, with the processor, cause the apparatus to retrieve trip replay data associated with a past trip of a user of a watercraft on a body of water. The trip replay data includes track data associated with a traveled path of the watercraft during the past trip and sonar image data associated with sonar images that were captured by a sonar system attached to the watercraft during the past trip. The computer program code is further configured, when executed, to cause the apparatus to display, on a first portion of a screen, the track data on a chart such that the traveled path of the watercraft during the past trip is displayed over the chart. The computer program code is further configured, when executed, to cause the apparatus to determine the position of the watercraft along the traveled path. The computer program code is further configured, when executed, to cause the apparatus to display, on a second portion of the screen, the sonar image data captured at the position of the watercraft. The computer program code is further configured, when executed, to cause the apparatus to receive user input indicating a desire to zoom in on a portion of the sonar image data being displayed. The computer program code is further configured, when executed, to cause the apparatus to display a zoomed in view of the portion of the sonar image data. 
         [0006]    In some embodiments, the user input further indicates a desire to lock the zoomed in view onto a bottom of the body of water. In such embodiments, the memory and the computer program code may be further configured to, with the processor, cause the apparatus to determine a depth associated with the bottom of the body of water at the position of the watercraft, wherein the position of the watercraft corresponds to the displayed sonar image data. Additionally, the memory and the computer program code may be further configured to, with the processor, cause the apparatus to determine, based on the determined depth, the portion of the sonar image data to be zoomed in on such that the bottom of the body of water is within the portion of the sonar image data. Additionally, the memory and the computer program code may be further configured to, with the processor, cause the apparatus to, as the position of the watercraft changes, automatically determine the portion of the sonar image data to be zoomed in on such that the bottom of the body of water is within the portion of the sonar image data to cause the zoomed in view to lock onto the bottom of the body of water as the position of the watercraft and corresponding displayed sonar image data changes. 
         [0007]    In some embodiments, the user input further indicates a desire to lock the zoomed in view onto vegetation within the body of water. In such embodiments, the memory and the computer program code may be further configured to, with the processor, cause the apparatus to determine a depth associated with vegetation within the body of water at the position of the watercraft, wherein the position of the watercraft corresponds to the displayed sonar image data. Additionally, the memory and the computer program code may be further configured to, with the processor, cause the apparatus to determine, based on the determined depth, the portion of the sonar image data to be zoomed in on such that the vegetation within the body of water is within the portion of the sonar image data. Additionally, the memory and the computer program code may be further configured to, with the processor, cause the apparatus to, as the position of the watercraft changes, automatically determine the portion of the sonar image data to be zoomed in on such that the vegetation within the body of water is within the portion of the sonar image data to cause the zoomed in view to lock onto the vegetation within the body of water as the position of the watercraft and corresponding displayed sonar image data changes. 
         [0008]    In some embodiments, the memory and the computer program code are further configured to, with the processor, cause the apparatus to determine a lowest point of a bottom of the body of water within the sonar image data and remove a portion of the sonar image data below the lowest point of the bottom from the trip replay data to enable a higher resolution image of remaining sonar image data. 
         [0009]    In some embodiments, the received user input includes hovering over the portion of the sonar image data being displayed, and the memory and the computer program code are further configured to, with the processor, cause the apparatus to display the zoomed in view of the portion of the sonar image data by displaying a separate pop-up window of the zoomed in view of the portion of the sonar image data. 
         [0010]    In some embodiments, the memory and the computer program code are further configured to, with the processor, cause the apparatus to display the zoomed in view of the portion of the sonar image data by replacing the sonar data that was being displayed on the second portion of the screen with the zoomed in view of the portion of the sonar image data. 
         [0011]    In some embodiments, the memory and the computer program code are further configured to, with the processor, cause the apparatus to receive second user input indicating a desire to pan the portion of the sonar image data that is being zoomed in on in one of an up direction, a down direction, a left direction, or a right direction, and cause panning of the zoomed in view of the portion of the sonar image data in the indicated up direction, down direction, left direction, or right direction. 
         [0012]    In another example embodiment of the present invention, a method is provided. The method includes retrieving trip replay data associated with a past trip of a user of a watercraft on a body of water. The trip replay data includes track data associated with a traveled path of the watercraft during the past trip and sonar image data associated with sonar images that were captured by a sonar system attached to the watercraft during the past trip. The method further includes displaying, on a first portion of a screen, the track data on a chart such that the traveled path of the watercraft during the past trip is displayed over the chart. The method further includes determining the position of the watercraft along the traveled path. The method further includes displaying, on a second portion of the screen, the sonar image data captured at the position of the watercraft. The method further includes receiving user input indicating a desire to zoom in on a portion of the sonar image data being displayed. The method further includes displaying a zoomed in view of the portion of the sonar image data. Example methods of the present invention may also include additional embodiments as described herein, such as described above with respect to the example apparatus. 
         [0013]    In yet another example embodiment of the present invention, a computer-readable medium is provided. The non-transitory computer-readable medium is comprised of at least one memory device having computer program instructions stored thereon, the computer program instructions being configured, when run by a processor, to retrieve trip replay data associated with a past trip of a user of a watercraft on a body of water. The trip replay data includes track data associated with a traveled path of the watercraft during the past trip and sonar image data associated with sonar images that were captured by a sonar system attached to the watercraft during the past trip. The computer program instructions are further configured, when run by the processor, to display, on a first portion of a screen, the track data on a chart such that the traveled path of the watercraft during the past trip is displayed over the chart. The computer program instructions are further configured, when run by the processor, to determine the position of the watercraft along the traveled path. The computer program instructions are further configured, when run by the processor, to display, on a second portion of the screen, the sonar image data captured at the position of the watercraft. The computer program instructions are further configured, when run by the processor, to receive user input indicating a desire to zoom in on a portion of the sonar image data being displayed. The computer program instructions are further configured, when run by the processor, to display a zoomed in view of the portion of the sonar image data. Example computer-readable medium of the present invention may also include additional embodiments as described herein, such as described above with respect to the example apparatus. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]    Having thus described the invention in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein: 
           [0015]      FIG. 1  illustrates a watercraft emitting one or more sonar beams into a body of water, in accordance with some embodiments discussed herein; 
           [0016]      FIG. 2  shows an example screen where an image of a trip replay for a past trip is displayed in a first portion and sonar imagery corresponding to the past trip is displayed in a second portion, in accordance with some embodiments discussed herein; 
           [0017]      FIG. 3  shows the example screen of  FIG. 2  with a portion of the sonar imagery being zoomed in on, in accordance with some embodiments discussed herein; 
           [0018]      FIG. 4  shows the example screen of  FIG. 3 , wherein the zoomed in sonar imagery has replaced the zoomed out sonar imagery shown in  FIG. 2 , in accordance with some embodiments discussed herein; 
           [0019]      FIG. 5  shows a block diagram illustrating an example system for providing adjustable range viewing of sonar imagery, in accordance with some embodiments discussed herein; and 
           [0020]      FIG. 6  illustrates a flowchart of an example method of adjustable range viewing of sonar imagery according to some embodiments discussed herein. 
       
    
    
     DETAILED DESCRIPTION 
       [0021]    Exemplary embodiments of the present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, the invention may be embodied in many different fauns and should not be construed as limited to the exemplary embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like reference numerals refer to like elements throughout. 
         [0022]    Embodiments of the present invention provide systems and associated methods for providing improved sonar image viewing during trip replay. In particular, sonar image data gathered during a trip and replayed on a screen accounts for the entire range of possible depths of the body of water traveled during the trip. Sometimes, however, a large depth range may result in loss of detail captured during the portions of the trip taken in shallow water. For example, detail taken between 0 feet and 5 feet (such as for shallow water) may not be visible because the entire range of depths accounts for the depth at the middle of the lake (e.g., 100 feet). In this regard, as described herein, embodiments of the present invention seek to provide improved viewing capabilities for portions of the sonar image during trip replay (e.g., zoomed in view, bottom lock, canopy lock). 
         [0023]    In some embodiments, the system  100  may be configured to track the travel path of the watercraft on a body of water. In this regard, the system  100  (e.g., through the position sensor  145  of  FIG. 5 ) may be configured to determine the location of the watercraft during a trip and keep a log of the locations traveled. The system  100  may be configured to store the traveled path (e.g., in memory  120  of  FIG. 5 ) as track data corresponding to a trip. In some embodiments, the track data may be associated with a chart image of the body of water. 
         [0024]    In some embodiments, the system  100  may be configured to capture and/or receive sonar data, such as from the transducer assembly (e.g., transducer assembly  15 ,  150 ) associated with an underwater environment relative to the watercraft. As detailed herein, using the sonar data, the system  100  may be configured to form sonar image data. The sonar image data can be used to form a sonar image that can be displayed to a user on a display (e.g., display  140  or display  194 ). In some embodiments, the sonar data may be used to determine the depth at a given location. 
         [0025]    For example, with reference to  FIG. 1 , a watercraft  10  may include a sonar system that includes a transducer assembly  15 . The transducer assembly  15  can be attached to the watercraft  10  and configured to transmit one or more sonar beams  12  (shown based on theoretical −3 dB range) into the underwater environment. Sonar signals from the one or more sonar beams can reflect off objects (such as the floor  14  of the body of water) and return (as sonar returns) to the transducer assembly  15 . The transducer assembly  15  (such as through one or more transducers) is configured to convert the sonar returns into electrical energy to form sonar data. This sonar data is received by one or more marine electronic devices (e.g., marine electronic device  105  in  FIG. 5 ) and used to generate an image of the underwater environment (e.g., a sonar image) that can be presented on a display (e.g., display  140 / 194  in  FIG. 5 ). 
         [0026]    Though the example illustrated transducer assembly  15  is attached so as to transmit the sonar beams  12  generally downwardly and to the side of the watercraft, other orientations/directions of the transducer assembly  15  are contemplated (e.g., forward facing, rearward facing, downward facing only, side facing only, among others without limitation). Likewise, while the example illustrated transducer assembly  15  is shown as a single sonar beam that has a fan-shape corresponding to a linear transducer, other sonar beam shapes (e.g., conical, elliptical, etc.), transducer shapes (circular, square, etc.), and number of transducers are contemplated by the present invention without limitation. 
         [0027]    In some embodiments, the sonar system  100  may be configured to determine the location corresponding to the received sonar data. For example, the sonar system may use the position sensor  145  to obtain a location of the watercraft when the sonar data is received. 
         [0028]    In some embodiments, the system  100  may be configured to store the track data and the sonar image data to form trip replay data. For example, trip replay data may include track data associated with a traveled path of the watercraft during a past trip. Trip replay data may also include sonar image data associated with sonar images that were captured by a sonar system (e.g., a transducer assembly) attached to the watercraft during the past trip. In this regard, a detailed log of the traveled path and corresponding sonar images during a past trip can be saved and played back later by a user. 
         [0029]    In some embodiments, the system  100  may be configured to display the track data on a chart such that the traveled path is displayed over the chart. In some embodiments, the track data and chart may be displayed on a first portion of a screen of a display (e.g., display  140  or  194  of  FIG. 5 ). For example,  FIG. 2  shows an example screen  200  with a chart  212  and track data  215  being displayed on a first portion (left portion). 
         [0030]    The track data of the trip replay data may be played back or currently displayed as being generated to a user. For example, such a display may occur on a display of a marine electronic device on the watercraft (e.g., marine electronic device  105 ). In some cases, the display may be updated in real-time, such as while the track data is being gathered. Alternately, the display may show the track data from a past trip. Similarly, in some embodiments, a user may utilize a remote electronic device (e.g., remote electronic device  195 ) for viewing the track data (and trip replay data in general). Such an application may be in the faun of a web viewer. Further information regarding an example trip replay system is described in U.S. patent application Ser. No. 14/673,459, entitled “Trip Replay for an Aquatic Geographic Information System”, filed Mar. 30, 2015, which is assigned to the assignee of the present application and incorporated herein by reference. 
         [0031]    In some embodiments, the system  100  may be configured to determine a position of a watercraft along the traveled path of the track data. For example, a user may select a position along the traveled path as represented by the displayed track data. Alternatively, the system  100  may be configured to determine the position of the watercraft as part of a playback or “running” of the track data. For example,  FIG. 2  illustrates a highlighted position  217  (e.g., an orange dot) of the watercraft along the track  215 . 
         [0032]    In some embodiments, the system  100  may be configured to determine sonar image data associated with the determined position of the watercraft. Such sonar image data may correspond to sonar image data captured (e.g., taken) while the watercraft was at the determined position during the past trip of the trip replay data. 
         [0033]    In some embodiments, the system  100  may be configured to display the sonar image data captured at the position of the watercraft. In some embodiments, the sonar image data may be displayed as a sonar image on a second portion of a screen of a display (e.g., display  140  or  194  of  FIG. 5 ) along with the track data that is being displayed on the first portion of the screen. For example,  FIG. 2  shows an example screen  200  with a chart  212  and track data  215  being displayed on a first portion (left portion) and a sonar image  220  displayed on a second portion (right portion). In the depicted embodiment, the sonar image  220  includes a location indication line  227  that denotes the slice of sonar image data captured when the watercraft was at the current position  217 . 
         [0034]    As noted above, depending on the depth range shown in the image and the depth of the portion of the sonar image that the user is interested in, there may be additional detail not currently visible or discernible on the screen. For example, the sonar image  220  shown in  FIG. 2  illustrates that there are varying depths to the bottom  225  of the body of water. Near the left side of the sonar image  220 , the depth to the bottom  225  is approximately 11 feet (see  223 ). However, near the right side of the sonar image  220 , the depth to the bottom  225  changes and is, instead, approximately 22 feet (see  224 ). 
         [0035]    To obtain a view that shows more detail (or other reasons), the user may wish to zoom in on a certain portion of the sonar image (e.g., the left side). As such, in some embodiments, the system  100  may be configured to receive user input (e.g., through the user interface  135  or  196  in  FIG. 5 ) indicating a desire to zoom in on a portion of the sonar image data being displayed. Such user input may come in any faun. For example, the user may indicate a portion of the sonar image and select a zoom button or option accessible via the user interface  135  of the marine electronic device  105  or the user interface  196  of the remote electronic device  195 . In some embodiments, the screen displaying the chart/track data and/or the sonar image data may be a touchscreen, and a user may apply user input directly to the touchscreen. For example, a user may use a zoom in gesture (e.g., a reverse pinch gesture) to indicate the portion of the sonar image data to zoom in on. Further, the user input may indicate the degree of zoom that the user desires. For example, the further a user spreads their fingers in a reverse pinch gesture, the higher degree of zoom desired. 
         [0036]    In response to receiving the user input, the system  100  may be configured to cause display of a zoomed in view of the portion of the sonar image data. In some embodiments, the system  100  may be configured to determine the portion of the sonar image data and the desired zoom level prior to causing display of the zoomed in view of the portion of the sonar image data. For example,  FIG. 3  illustrates an example zoomed in view  230   a  of the portion  230  of the sonar image data  220 . In the depicted example, the zoomed in view  230   a  provides additional detail of the sonar image data. For example, the vegetation  245  is enlarged with additional detail now more readily discernible and visible. Further, the zoomed in view shows a close up view of the bottom  225   a  and also displays an indicator line  227   a  corresponding to the position of the watercraft  217  along the track  215  (if appropriate). 
         [0037]    In some embodiments, the system  100  may be configured to display the zoomed in view of the sonar image data in any number of different ways. For example,  FIG. 3  depicts an example embodiment where the zoomed in view is displayed as a separate pop-up window. Another example embodiment is shown in  FIG. 4 , where the zoomed in view  230   a  replaces the overall sonar image  220  shown in  FIG. 2 . 
         [0038]    In some embodiments, such as when the zoomed in view is displayed as a separate pop-up window, the system  100  may be configured to receive the user input in the form of hovering over the portion of the sonar image data. In this regard, the separate pop-up window may operate as a preview of the zoomed in view. Further, in some embodiments, if the hovered over portion is selected, the overall sonar image  220  may be replaced by the zoomed in view  230   a  of the sonar image data (such as shown in  FIG. 4 ). 
         [0039]    Though the above described embodiments focus on zooming in, embodiments of the present invention also contemplate zooming out. Similarly, in some embodiments, the system  100  may be configured to enable panning (e.g., up or down or left or right) of the zoomed in view of the sonar image data. For example, when the zoomed in view is displayed, the system  100  may be configured to receive second user input indicating a desire to pan the portion of the sonar image data that is being zoomed in on in a direction (e.g., up, down, left, or right). In response, the system  100  may be configured to cause panning of the zoomed in view of the portion of the sonar image data in the corresponding direction. 
         [0040]    Some embodiments of the present invention contemplate providing further features that may be useful to a viewer. For example, in some embodiments, the system  100  may be configured to playback the trip replay such that the sonar image data and the depicted position of the watercraft replay the trip. In this regard, the position of the watercraft and the corresponding sonar image data move on the screen (e.g., like watching a video replay over time). Such playback can occur in forward or reverse and can be played at varying speeds. 
         [0041]    In some embodiments, the system  100  may be configured to provide a “bottom lock” feature, such as in response to user input indicating a desire to lock the zoomed in view onto the bottom of the body of water. Such a feature will determine a zoomed in view that focuses on the bottom and update the zoomed in view accordingly. 
         [0042]    In this regard, in some embodiments, the system  100  may be configured to determine (e.g., with processor  110  or  191  in  FIG. 5 ) a depth associated with the bottom of the body of water at the position of the watercraft. This determination could be accomplished in any number of different ways. In one example embodiment, the system  100  may be configured to determine the depth at the current position of the watercraft based on stored depth data from the sonar data used for the sonar image data. In another example embodiment, the system  100  may be configured to determine the depth using image discerning software to determine the depth as shown in the sonar image. Once the depth is determined, the system  100  may be configured to determine the portion of the sonar image data to be zoomed in on such that the bottom of the body of water is within the portion of the sonar image data. In some embodiments, such an example image may include a determination of a range of depths around the determined depth of the bottom, such as based on the indicated zoom level. Additionally or alternatively, the size of the image around the determined depth associated with the bottom may be predetermined (or configured). In some embodiments, the bottom of the body of water may be centered in the zoomed in view. The displayed zoomed in view of the sonar image data may be updated accordingly. In some embodiments, the bottom lock feature may occur during playback or not during playback. Either way, this may result in an easy to use feature that automatically determines and zooms in on the bottom. 
         [0043]    In some embodiments, the bottom lock may automatically update the zoomed in sonar image such that it changes (e.g., moves up or down) to continue to focus (or “lock” onto the bottom) as the sonar image data plays back. In this regard, the depth determination may be continually updated as the watercraft “travels” along the track during the playback. As such, the system  100  may be configured to, as the position of the watercraft changes, automatically determine the portion of the sonar image data to be zoomed in on such that the bottom of the body of water is within the portion of the sonar image data. This would cause the zoomed in view to lock onto the bottom of the body of water as the position of the watercraft and corresponding displayed sonar image data changes. For example, with reference to  FIG. 2 , as the watercraft  217  moves forward along the track  215 , the sonar image data will scroll from right to left (with the indicator line  227  denoting the sonar image data corresponding to the “new” position of the watercraft). As the sonar image data scrolls past the indicator line  227 , the depth of the bottom  225  changes. Using bottom lock, the system  100  would follow the bottom  225  by changing the portion of the sonar image data that is being zoomed in on. 
         [0044]    In some embodiments, the system  100  may be configured to provide a “canopy lock” feature, such as in response to user input indicating a desire to lock the zoomed in view onto vegetation within the body of water. Such a feature will determine a zoomed in view that focuses on vegetation in the sonar image and update the zoomed in view accordingly. 
         [0045]    In this regard, in some embodiments, the system  100  may be configured to determine (e.g., with processor  110  or  191  in  FIG. 5 ) a depth associated with vegetation within the body of water at the position of the watercraft. This determination could be accomplished in any number of different ways. In one example embodiment, the system  100  may be configured to determine the vegetation at the current position of the watercraft based on stored depth data associated with vegetation from the sonar data used for the sonar image data. In another example embodiment, the system  100  may be configured to determine the depth of the vegetation using image discerning software to determine the depth as shown in the sonar image. Once the depth of the vegetation is determined, the system  100  may be configured to determine the portion of the sonar image data to be zoomed in on such that the vegetation within the body of water is within the portion of the sonar image data. In some embodiments, such an example image may include a determination of the overall size of the vegetation. Additionally or alternatively, the size of the image around the determined depth associated with the vegetation may be predetermined (or configured). In some embodiments, the center of the vegetation within the body of water may be centered in the zoomed in view. The displayed zoomed in view of the sonar image data may be updated accordingly. In some embodiments, the canopy lock feature may occur during playback or not during playback. Either way, this may result in an easy to use feature that automatically determines and zooms in on the canopy. 
         [0046]    In some embodiments, the canopy lock may automatically update the zoomed in sonar image such that it changes (e.g., moves up or down) to continue to focus (or “lock” onto the vegetation) as the sonar image data plays back. In this regard, the depth determination for the vegetation may be continually updated as the watercraft “travels” along the track during the playback. In this regard, the system  100  may be configured to, as the position of the watercraft changes, automatically determine the portion of the sonar image data to be zoomed in on such that the vegetation within the body of water is within the portion of the sonar image data. This would cause the zoomed in view to lock onto the vegetation within the body of water as the position of the watercraft and corresponding displayed sonar image data changes. For example, with reference to  FIG. 3 , as the watercraft  217  moves forward along the track  215 , the sonar image data will scroll from right to left (with the indicator line  227  denoting the sonar image data corresponding to the “new” position of the watercraft). As the sonar image data scrolls past the indicator line  227 , the depth of the vegetation (e.g.,  245 ) changes. Using canopy lock, the system  100  would follow the vegetation by changing the portion of the sonar image data that is being zoomed in on. 
         [0047]    Depending on the configuration of the depth range gathered by the sonar image data during the trip, there may be additional or unused depth readings that extend past the bottom of the body of water. For example, the depth range of the sonar system may be set to 150 feet, but the ultimate depth of the bottom of the body of water may only reach 120 feet. In such an example, depth readings from 120 feet-150 feet are extra and unnecessary. For example, with reference to  FIG. 2 , there are extra depth readings  252  below the bottom  225  at the lowest point. In some embodiments, the system  100  may be configured to identify and remove the extra sonar image data. As a result, the system  100  may be configured to update the sonar image to zoom in on the remaining sonar image data. In some embodiments, to accomplish this, the system  100  may be configured to determine a lowest point of a bottom of the body of water within the sonar image data. This may be the lowest point for the entire body of water, the entire trip, or the currently displayed sonar image data. For example, the system  100  may determine that the lowest point of the bottom is 22 feet. After determining the lowest point, the system  100  may be configured to determine and remove the portion of the sonar image data below the lowest point to enable a higher resolution image (e.g., a zoomed in view) of the remaining sonar image data. This removal could occur temporarily or permanently. 
       Example System Architecture 
       [0048]      FIG. 5  shows a block diagram of an example system  100  capable for use with several embodiments of the present invention. As shown, the system  100  may include a number of different modules or components, each of which may comprise any device or means embodied in either hardware, software, or a combination of hardware and software configured to perform one or more corresponding functions. For example, the system  100  may include a transducer assembly  150 , a marine electronic device  105 , and a remote electronic device  195 . 
         [0049]    The system  100  may also include one or more communications modules configured to communicate with one another in any of a number of different manners including, for example, via a network. In this regard, the communication interfaces (e.g.,  130 ,  193 ) may include any of a number of different communication backbones or frameworks including, for example, Ethernet, the NMEA 2000 framework, GPS, cellular, WiFi, or other suitable networks. The network may also support other data sources, including GPS, autopilot, engine data, compass, radar, etc. Numerous other peripheral devices such as one or more wired or wireless multi-function displays (e.g., a marine electronic device  105 ) may be included in the system  100 . 
         [0050]    The marine electronic device  105  may include a processor  110 , a sonar signal processor  115 , a memory  120 , a user interface  135 , a display  140 , one or more sensors (e.g., position sensor  145 , orientation sensor (not shown), etc.), and a communication interface  130 . 
         [0051]    The processor  110  (e.g., a sonar signal processor  115 ) may be any means configured to execute various programmed operations or instructions stored in a memory device such as a device or circuitry operating in accordance with software or otherwise embodied in hardware or a combination of hardware and software (e.g., a processor operating under software control or the processor embodied as an application specific integrated circuit (ASIC) or field programmable gate array (FPGA) specifically configured to perform the operations described herein, or a combination thereof) thereby configuring the device or circuitry to perform the corresponding functions of the processor  110  as described herein. In this regard, the processor  110  may be configured to analyze electrical signals communicated thereto to provide sonar data indicative of the size, location, shape, etc. of objects detected by the system  100 . For example, the processor  110  may be configured to receive sonar return data and process the sonar return data to generate sonar image data for display to a user (e.g., on display  140 ). 
         [0052]    In some embodiments, the processor  110  may be further configured to implement signal processing or enhancement features to improve the display characteristics or data or images, collect or process additional data, such as time, temperature, GPS information, waypoint designations, or others, or may filter extraneous data to better analyze the collected data. It may further implement notices and alarms, such as those determined or adjusted by a user, to reflect depth, presence of fish, proximity of other watercraft, etc. 
         [0053]    The memory  120  may be configured to store instructions, computer program code, marine data, such as sonar data, chart data, location/position data, and other data associated with the sonar system in a non-transitory computer readable medium for use, such as by the processor. 
         [0054]    The communication interface  130  may be configured to enable connection to external systems (e.g., an external network  102  or a remote electronic device  195 ). In this manner, the marine electronic device  105  may retrieve stored data from a remote, external server via the external network  102  or directly from a remote electronic device  195  in addition to or as an alternative to the onboard memory  120 . 
         [0055]    The position sensor  145  may be configured to determine the current position and/or location of the marine electronic device  105 . For example, the position sensor  145  may comprise a GPS or other location detection system. 
         [0056]    The display  140  may be configured to display images and may include or otherwise be in communication with a user interface  135  configured to receive input from a user. The display  140  may be, for example, a conventional LCD (liquid crystal display), a touch screen display, mobile device, or any other suitable display known in the art upon which images may be displayed. 
         [0057]    In any of the embodiments, the display  140  may present one or more sets of marine data (or images generated from the one or more sets of data). Such marine data includes chart data, radar data, weather data, location data, position data, orientation data, sonar data, or any other type of information relevant to the watercraft. In some embodiments, the display may be configured to present such marine data simultaneously as in split-screen mode. In some embodiments, a user may select any of the possible combinations of the marine data for display. 
         [0058]    The user interface  135  may include, for example, a keyboard, keypad, function keys, mouse, scrolling device, input/output ports, touch screen, or any other mechanism by which a user may interface with the system. 
         [0059]    Although the display  140  of  FIG. 5  is shown as being directly connected to the processor  110  and within the marine electronic device  105 , the display  140  could alternatively be remote from the processor  110  and/or marine electronic device  105 . Likewise, in some embodiments, the sonar signal processor  115 , the position sensor  145 , and/or user interface  135  could be remote from the marine electronic device  105 . 
         [0060]    The remote electronic device  195  may include components (hardware or software) that are configured according to any of the example embodiments detailed herein in the same manner as those of the marine electronic device  105 . For example, the remote electronic device  195  may include a processor  191 , a memory  192 , a user interface  196 , a display  194 , and a communication interface  193 . Each component of the remote electronic device  195  may be configured in accordance with the same component of the marine electronic device  105 . In this regard, as detailed herein, embodiments of the present invention contemplate operation and/or use with either or both of the marine electronic device  105  or the remote electronic device  195 . 
         [0061]    The transducer assembly  150  according to an exemplary embodiment may be provided in one or more housings that provide for flexible mounting options with respect to the watercraft. In this regard, for example, the housing may be mounted onto the hull of the watercraft or onto a device or component that may be attached to the hull (e.g., a trolling motor or other steerable device, or another component that is mountable relative to the hull of the vessel), including a bracket that is adjustable on multiple axes, permitting omnidirectional movement of the housing. 
         [0062]    The transducer assembly  150  may include one or more transducers or transducer elements positioned within the housing. Each transducer may be configured as transmit/receive, transmit-only, or receive-only with respect to transmitting one or more sonar beams and receiving sonar returns. In some embodiments, each of the transducer elements may be positioned within the housing so as to point toward a predetermined area under, to the side, or the front of the watercraft. The shape of a transducer element may largely determine the type of beam that is formed when that transducer element transmits a sonar pulse (e.g., a circular transducer element emits a cone-shaped beam, a linear transducer emits a fan-shaped beam, etc.). Embodiments of the present invention are not limited to any particular shape transducer. Likewise, transducer elements may comprise different types of materials that cause different sonar pulse properties upon transmission. For example, the type of material may determine the strength of the sonar pulse. Additionally, the type of material may affect the sonar returns received by the transducer element. As such, embodiments of the present invention are not meant to limit the shape or material of the transducer elements. Further, transducers may configured to transmit and/or receive at different frequencies. In this regard, embodiments of the present invention are not meant to be limited to certain frequencies. 
         [0063]    Additionally, in some embodiments, the transducer assembly  150  may have a sonar signal processor (e.g., sonar signal processor  115 ) and/or other components positioned within the housing. For example, one or more transceivers (e.g., transmitter/receiver), transmitters, and/or receivers may be positioned within the housing and configured to cause the one or more transducers to transmit sonar beams and/or receive sonar returns from the one or more transducers. In some embodiments, the sonar signal processor, transceiver, transmitter, and/or receiver may be positioned in a separate housing. 
       Example Flowchart(s) and Operations 
       [0064]    Embodiments of the present invention provide methods, apparatuses and computer program products for providing a zoomed in view of sonar image data during a trip replay. Various examples of the operations performed in accordance with embodiments of the present invention will now be provided with reference to  FIG. 6 . 
         [0065]      FIG. 6  illustrates a flowchart according to an example method for providing a zoomed in view of sonar image data during a trip replay according to an example embodiment  400 . The operations illustrated in and described with respect to  FIG. 6  may, for example, be performed by, with the assistance of, and/or under the control of one or more of the processor  110 / 191 , sonar signal processor  115 , memory  120 / 192 , communication interface  130 / 193 , user interface  135 / 196 , position sensor  145 , display  140 / 194 , and/or transducer assembly  150 . Operation  402  may comprise retrieving trip replay data, including track data and sonar image data. The processor  110 / 191 , sonar signal processor  115 , memory  120 / 192 , and/or transducer assembly  150  may, for example, provide means for performing operation  402 . Operation  404  may comprise causing display of track data on a chart on a first portion of the screen. The processor  110 / 191 , communication interface  130 / 193 , display  140 / 194 , and/or memory  120 / 192  may, for example, provide means for performing operation  404 . Operation  406  may comprise determining a position of the watercraft. The processor  110 / 191 , memory  120 / 192 , position sensor  145 , and/or communication interface  130 / 193  may, for example, provide means for performing operation  406 . Operation  408  may comprise causing display of sonar image data captured at that position of the watercraft on a second portion of the screen. The processor  110 / 191 , communication interface  130 / 193 , display  140 / 194 , and/or memory  120 / 192  may, for example, provide means for performing operation  408 . Operation  410  may comprise receiving user input indicating a desire to zoom in on a portion of the sonar image data. The user interface  135 / 196 , communication interface  130 / 193 , display  140 / 194 , and/or memory  120 / 192  may, for example, provide means for performing operation  410 . Operation  412  may comprise causing display of a zoomed in view of the portion of the sonar image data. The processor  110 / 191 , communication interface  130 / 193 , display  140 / 194 , and/or memory  120 / 192  may, for example, provide means for performing operation  412 . 
         [0066]      FIG. 6  illustrates a flowchart of a system, method, and computer program product according to an example embodiment. It will be understood that each block of the flowcharts, and combinations of blocks in the flowcharts, may be implemented by various means, such as hardware and/or a computer program product comprising one or more computer-readable mediums having computer readable program instructions stored thereon. For example, one or more of the procedures described herein may be embodied by computer program instructions of a computer program product. In this regard, the computer program product(s) which embody the procedures described herein may be stored by, for example, the memory  120 / 192  and executed by, for example, the processor  110 / 191  or sonar signal processor  115 . As will be appreciated, any such computer program product may be loaded onto a computer or other programmable apparatus (for example, a marine electronic device  105  and/or remote electronic device  195 ) to produce a machine, such that the computer program product including the instructions which execute on the computer or other programmable apparatus creates means for implementing the functions specified in the flowchart block(s). Further, the computer program product may comprise one or more non-transitory computer-readable mediums on which the computer program instructions may be stored such that the one or more computer-readable memories can direct a computer or other programmable device (for example, a marine electronic device  105  and/or remote electronic device  195 ) to cause a series of operations to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus implement the functions specified in the flowchart block(s). 
       Conclusion 
       [0067]    Many modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the embodiments of the invention are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the invention. Moreover, although the foregoing descriptions and the associated drawings describe example embodiments in the context of certain example combinations of elements and/or functions, it should be appreciated that different combinations of elements and/or functions may be provided by alternative embodiments without departing from the scope of the invention. In this regard, for example, different combinations of elements and/or functions than those explicitly described above are also contemplated within the scope of the invention. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.