Communications – electrical: acoustic wave systems and devices – Echo systems – Speed determination
Patent
1978-09-05
1980-08-05
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
Speed determination
367 95, 367 97, 367108, 343 5BD, G01S 754, G01S 968
Patent
active
042165385
ABSTRACT:
A navigation aid for determining berthing data comprises distance detecting units embodying sonar transducers which are spaced apart along the length of a jetty a short distance behind the berthing line. The units are operative to provide signals indicative of the distance from the berthing line of correspondingly spaced sections of the ship, and a microcomputer selects two out of three of these signals and processes them to determine the distance from the berthing line of nominal bow and stern sections of the ship, the nominal measuring points being different from the actual measuring points at which the transducers are positioned. The microcomputer also processes the selected signals to determine the velocity of the bow and stern sections relative to the berthing line, and controls a jetty display of the determined distance and velocity data in addition to local and remote indications/recordal thereof.
REFERENCES:
patent: 3673553 (1972-06-01), Miura et al.
patent: 3980983 (1976-09-01), Shannon
Kritz et al., Navigation, vol. 16, No. 1, 1969, pp. 3-20.
Healy Dennis
Tomlinson Peter
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