Patent ID: 9213077
Filing Date: 2015-12-15
Classification: B63B,B63C,G01S

Abstract:
1. A method of locating a plurality of water based systems, the method comprising: each water based system determining its geo-location; each water based system encoding its geo-location for radio frequency transmission; each water based system encoding its geo-location for acoustic transmission; each water based system transmitting radio frequency and acoustic signals containing the encoded geo-location at a predetermined time, wherein the pre-determined times for each of the plurality of water based systems are selected using a time-division multiple access scheme using a synchronized time; repeating the determining, encoding, updating, and transmitting steps after pre-determined intervals; receiving the radio frequency and/or acoustic signals containing the encoded geo-location for each of the plurality of water based systems by a receiving station; decoding each of the plurality of water based systems' geo-location; retrieving each of the plurality of water based systems, wherein the step of determining each water based system's geo-location uses a global positioning system comprising an antenna and a receiver, wherein the synchronized time is based on information received through the global positioning system, and wherein the pre-determined intervals increase over time.