Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent
1982-09-29
1985-07-30
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Offshore prospecting
367 6, 367106, G01V 138
Patent
active
045326177
ABSTRACT:
A system and method for determining the position of towed marine object relative to a towing vessel. The system comprises a towing vessel, a slave vessel, and the towed object. An acoustic transceiver is located on either the towing vessel or the slave vessel with an acoustic receiver located on the other vessel. One or more acoustic transponders are associated with the towed object. The distance between the towing vessel and the slave vessel is determined, for example, by radio navigation which is calibrated by a high precision range-range system. The acoustic transmitter emits an interrogation signal which causes the transducer(s) to emit a response acoustic signal which is recorded at the two receivers. Using the time for the response signal to reach each of the receivers and the velocity of sound in water, the distance of the transducer from each vessel is calculated. With the three distances the location of the transducer relative to the towing vessel is determined by trilateration. The system is especially useful for determining the horizontal profile of a towed seismic cable, where a series of transducers are located along the cable. The interrogation signal will interrogate each transducer sequentially and by trilateration of each transducer a very accurate representation of the horizontal profile is obtained.
REFERENCES:
patent: 3439319 (1969-04-01), Whitfill
patent: 3581275 (1971-05-01), Hedberg
patent: 3906352 (1975-09-01), Parker
patent: 3953827 (1976-04-01), Moal et al.
patent: 4087780 (1978-05-01), Itria et al.
patent: 4254478 (1981-03-01), Dumas
patent: 4388710 (1983-06-01), Pecon, Jr.
patent: 4446538 (1984-05-01), Zachariadis
Baecker Donald R.
Bijou Joseph V.
Farley Richard A.
Johnson Kenneth H.
LandOfFree
System for locating a towed marine object does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for locating a towed marine object, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for locating a towed marine object will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2376884