Patent ID: 11953321
Assignee: IDROP AS
Field: Control (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A method for determining a water current velocity profile in a water column by registration of a deviation between a first position and a second position of an underwater vehicle travelling in the water column, said method comprising:
deploying a first batch of underwater vehicles comprising at least one vehicle from a surface vessel into the water,
said at least one vehicle steering to the first position which for the first batch is a predefined estimated position (PEP) calculated by a first predefined water current velocity profile wherein the at least one vehicle by first means is recording the second position, which is the actual position (AP),
the difference ΔP between the predefined estimated position PEP and the actual position (AP) is registered and based on said difference a deviation data set is calculated and an updated horizontal water current velocity UV is determined in said water column,
the updated water current velocity UV is sent to a controller,
said controller is updating the predefined estimated position PEP to an updated estimated position UEP based on the predefined estimated position PEP and the updated water current velocity UV, and
a next batch of vehicles dropped into the water are steering to the first position based on the updated estimated position UEP.