Abstract: A system for measuring the position of an asset is provided. The system includes a first plurality of global positioning system (GPS) sensors arranged on a first asset, and a reference position source arranged on the first asset. One or more computer processors is provided in communication with a memory and is configured to measure position data associated with the first asset from the outputs of the first plurality of GPS sensors, and calculate a measurement offset between the measured position data associated with the first asset and position data obtained from the reference position source. From these measurements, position data measurements obtained from the plurality of GPS sensors of the first asset may be corrected using the calculated measurement offset. Likewise, position data measurements obtained from a plurality of GPS sensors of a second asset, located remotely from the first asset, are also corrected using the calculated measurement offset.

Abstract: A method for adapting the pointing of a radar system in response to distortion of a deckhouse support structure supporting plural antenna arrays of the radar system is provided. The method comprises the steps of making repeated measurements between at least one laser tracker located within the support structure and laser targets mounted within the support structure, and comparing the current measurements with previous measurements to determine physical bias introduced into the structure.

Abstract: A method for magnetically compensating the magnetic field distortion occasioned by a ferromagnetic portion of the hull of a vessel includes providing a plurality of electromagnets at predetermined locations throughout the vessel replacing the conventional ship-sized air coils and controlling the amount of energizing current provided to each of the plurality of electromagnets, appropriate magnetic field is generated for compensating the magnetic field distortion using a fraction of energizing DC current.

Abstract: A system is provided for rigidly attaching a supply ship to a receiving ship to facilitate efficient transport of materials there-between even when the vessels are subject to heavy seas and weather. A telescoping truss assembly is provided on the first ship, and has a distal end configured to mate with a receptacle assembly on the second ship. Cables are disposed within the truss and are used to draw the truss and receptacle assemblies into engagement with each other. Once the assemblies are engaged, a hydraulic system is used to draw the two ships together, rigidifying the truss assembly and fixing the two ships in a “catamaran” arrangement. Subsequent transfers of materials between the ships can be carried out without the need to compensate for the relative dynamic vertical and horizontal displacements between the ships due to wind and waves.