Method and means for surveying positions of mooring lines

Details Method and means for surveying positions of mooring lines Method and means for surveying positions of mooring lines

G - Physics

01

S

349/25

G01S 15/42 (2006.01) G01S 5/18 (2006.01) G01S 15/06 (2006.01) G01S 15/88 (2006.01)

Patent

CA 1231775

A B S T R A C T METHOD AND MEANS FOR SURVEYING POSITIONS OF MOORING LINES Means are provided for surveying positions of mooring lines extending between a moored structure and anchors in the water bottom. The means comprise a rotatable submarine transducer assembly including acoustic pulse transmitting means and an array of acoustic receivers, a support for locating the transducer assembly at a predetermined level above the water bottom and actuator means for rotating said assembly about a vertical axis relative to the support. During operation the transmitting means produce a beam of acoustic pulses. Pulse reflections originating from mooring line sections that are successively scanned by said beam are received by the acoustic receivers, and the position of each scanned mooring line section is calculated by a processor unit on the basis of the time intervals at which said pulses are received after transmission.

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