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Methods and system to assist search for lost and submerged objects

  • US 9,995,824 B2
  • Filed: 08/27/2014
  • Issued: 06/12/2018
  • Est. Priority Date: 04/09/2014
  • Status: Active Grant
First Claim
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1. A first device configured to be located at an object to aid in the location of the object when the object is lost and submerged comprising:

  • a receiver at a submerged depth substantially below a surface configured to receive an interrogation signal when sent from a search second device near the surface; and

    a transmitter at a submerged depth substantially below a surface configured to transmit a ping signal to the search second device in response to the interrogation signal from the search second device;

    whereina parameter of the ping signal is modified as a function of at least one of the parameters of the interrogation signal to substantially increase the distance between the search second-device and the transmitter across which the search second device can detect the ping signal from the distance between the search second device and the transmitter across which than the search second device can detect a ping signal from the transmitter using the parameter without the modification.

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