Flasher display sonar depth sounder non-intrusion sensor

Details Flasher display sonar depth sounder non-intrusion sensor Flasher display sonar depth sounder non-intrusion sensor

1990-09-10

1992-07-07

Sotelo, Jesus D.

Ships

Steering mechanism

Remote control steering excluding manual operation

367111, B63H 2500

Patent

active

051273527

ABSTRACT:
A small motor powered boat guidance system is disclosed and includes an arrangement for sensing the vertical distance between the boat and the bottom of a body of water in which the boat is floating and for providing a visual indication of the sensed vertical distance. A first series of visible pulses and a second series of visible pulses of the same frequency as the first series of pulses are generated with the pulses of the first and second series being interleaved and with the phase difference therebetween being indicative of the vertical distance. The visual indicator also generates, simultaneous with the visual indications, electromagnetic radiation in a region of the electromagnetic spectrum remote from the visible portion of the spectrum. An antenna and associated circuitry is responsive to the electromagnetic radiation remote from the visible portion of the spectrum for determining the phase difference between the first and second series of pulses, and therefor also an indication of the distance between the boat and the bottom of the body of water. This distance indication is compared to an operator entered selected distance and an output indication is provided when the distance indication and the selected distance differ by more than a predetermined value. Upon an indication that the distance indication and the selected distance differ by more than a predetermined value, the direction of motor thrust relative to the boat is modified appropriately.

REFERENCES:
patent: 3844242 (1974-10-01), Sernatinger et al.
patent: 4829493 (1989-05-01), Bailey
patent: 4988996 (1991-01-01), Ito

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