Abstract:
An anti-terrorist ship control system includes satellites that automatically take control of a waterborne vessel when the vessel&#39;s position or speed deviate from planned tracks or when the vessel transmits a distress signal or when the vessel stops reporting its status to the satellites.

Description:
FIELD OF THE INVENTION 
     The present invention relates generally to shipping control. 
     BACKGROUND 
     Terrorism is a fact of life, although not necessarily an immutable one. One target might be shipping, particularly large tankers or other large ships that carry dangerous or explosive cargo. 
     This invention can be used to foil infidels who attempt to hijack a ship and sail it into a target. 
     SUMMARY OF THE INVENTION 
     A manned vessel includes a waterborne hull and a control system supported on the hull and responsive to control signals from a control satellite to automatically control the speed and/or course of the vessel. If desired, a position reporting system can be mounted on the hull and can communicate a position of the vessel, a speed of the vessel, and a course of the vessel, to the satellite, for purposes to be shortly disclosed. 
     In a preferred implementation, a receiver is on the hull for receiving signals from the control satellite and communicating with the control system. The control signals can be generated when a reported position of the vessel deviates from a track position by at least a predetermined distance, or when a reported speed of the vessel deviates from a predetermined speed by at least a predetermined amount, or in response to an unplanned cessation of report signals from the position reporting system, or in response to a distress signal. Moreover, the control system can receive an override signal indicating overriding of remote control, and automatically activate a scuttling system in response to scuttle the vessel in the absence of an authorization signal to the contrary. 
     In another aspect, a method to foil ship hijackers includes permitting shipboard control of a ship until an indication of a hijacking of the ship is received. In response to the indication, at least one shipboard control system is disabled and/or overridden with signals from a satellite. 
     In yet another aspect, a shipping control system includes at least one space-based satellite, at least one waterborne vessel capable of receiving signals from the satellite, and at least one of: a propulsion system, a steering system, and a scuttling system on the vessel. The satellite is capable of receiving at least one indication of unauthorized control of the vessel and in response thereto automatically controlling at least one of the propulsion system, steering system, and scuttling system. 
     The details of the present invention, both as to its structure and operation, can best be understood in reference to the accompanying drawings, in which like reference numerals refer to like parts, and in which: 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a block diagram of the present system; and 
     FIG. 2 is a flow chart of the present logic. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring initially to FIG. 1, a manned waterborne vessel  10  includes a hull  12  with quarters  14  for a crew of people. In one non-limiting embodiment, the vessel  10  is an oil tanker. The vessel  10  can communicate with a space-based control satellite  16  using a radio transceiver  18 . The control satellite  16  in turn communicates with control infrastructure including a land-based or space-based control authority  20 , such as a national command authority. The control authority  20  and/or control satellite  16  preferably have access to a planned track, including planned courses and speeds, for the vessel  10 . 
     The radio  18  communicates signals from the satellite  16  to at least one computerized control system  22  onboard the vessel  10 . As shown, the control system  22  receives position and/or speed and/or course information from a position module  24 , which can communicate with, e.g., a space-based GPS satellite  26  to receive position information therefrom. Also, the control system  22  can communicate control signals to at least one of a propulsion control system  28 , a steering control system  30 , and a scuttling control system  32  to respectively control the speed and course of the vessel  10  and to scuttle the vessel  10 . While FIG. 1 shows separate modules/systems  22 ,  24 ,  28 ,  30 ,  32  for ease of disclosure, it is to be understood that their functions can be integrated into more, fewer, or indeed a single computerized component. 
     FIG. 2 shows the logic of the present invention. Commencing at block  34 , the vessel  10  periodically transmits a report to the control satellite  16  (and, hence, to the control authority  20 ). The report can be a position report, a speed report, a course report, or all three, as received from, e.g., the position module  24 , and it is preferably automatically (without human intervention) or manually (with human intervention) generated at specified intervals. 
     At decision diamond  36 , it is determined by the control satellite  16  and/or control authority  20  whether a speed and/or position variance exists. That is, it is determined whether the vessel&#39;s course/speed varies from a planned course/speed by more than a predetermined amount, or whether the vessel&#39;s position varies from a planned track position by more than a predetermined amount. Also, even when the vessel&#39;s course, speed, and position are within planned bounds, the logic can move to decision diamond  38  to determine whether the vessel  10  has failed to report. This can happen when, e.g., terrorists commandeer the vessel  10 . Yet again, the logic can move to decision diamond  40  to determine whether a distress signal has been sent from the vessel  10  by, e.g., a radio operator who is aware of a terrorist attack. If no indications of hijacking are received, the logic ends at state  42 , i.e., the above-described vessel  10  monitoring simply repeats. 
     In contrast, when any one of the tests at decision diamonds  36 ,  38 ,  40  is positive, indicating a hijacking of the vessel  10 , the logic moves to block  44 , wherein a control signal is transmitted or otherwise generated from the control satellite  16 . It is to be understood that the “control signal” can be generated at the control authority  20  and relayed via the control satellite  16 , or initiated onboard the satellite  16  itself, and that it retains its identity as a “control signal” regardless of how processed through intermediate electronic or computer components. 
     In accordance with the present invention, the control signal can be configured to cause one or more actions to be automatically taken. Stated differently, the control signal disables and/or overrides local control of at least one shipboard control system, such as the propulsion control system  28 , steering control system  30 , or scuttling system  32 . By way of example, the control signal can cause the propulsion system to come to “all stop” or even “back full”. Or, it can cause the steering system to come to a new course or to lay the rudder over so that the vessel  10  circles in the water. Yet again, under certain circumstances such as an in extremis situation where the vessel  10  might be in a harbor as planned but heading at high speed for a populated pier, or when the terrorists have managed to override the control system  22  as indicated by continued indications of a hijacking or other override signal or indication, the scuttling system  32  might be actuated to sink the vessel. 
     In any case, in the event of a hijacking indication, the satellite  16  also sends a message to, e.g., the control authority  20  of this fact. 
     At decision diamond  48 , it is determined whether an authorization to resume local control of the vessel  10  has been received. Such an authorization might be generated when, e.g., the terrorists have been overcome, or when a false indication of a hijacking has been given for some reason, e.g., by mistake. The authorization might be in any number of forms, and can be cryptographically protected. For instance, the captain of the vessel  10  and only the captain might be provided with a secret code that he can transmit to the satellite  16  to cause control of the vessel  10  to be returned to local onboard systems at block  50 . 
     While the particular ANTI-TERRORISM SHIPPING CONTROL as herein shown and described in detail is fully capable of attaining the above-described objects of the invention, it is to be understood that it is the presently preferred embodiment of the present invention and is thus representative of the subject matter which is broadly contemplated by the present invention, that the scope of the present invention fully encompasses other embodiments which may become obvious to those skilled in the art, and that the scope of the present invention is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more”. All structural and functional equivalents to the elements of the above-described preferred embodiment that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the present claims. Moreover, it is not necessary for a device or method to address each and every problem sought to be solved by the present invention, for it to be encompassed by the present claims. Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element herein is to be construed under the provisions of 35 U.S.C. §112, sixth paragraph, unless the element is expressly recited using the phrase “means for” or, in the case of a method claim, the element is recited as a “step” instead of an “act”.