Navigational aids

Details Navigational aids Navigational aids

1978-03-16

1980-06-10

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343112D, 367124, G01S 514, G01S 518

Patent

active

042075718

ABSTRACT:
A navigational-aid apparatus and method involving the use, on a target station or a craft station, of at least two transmitters, separated by a base-line distance, of distinguishable sonic signals and a transmitter of radio or other electromagnetic signals and, on the craft station or the target station respectively, of three receivers for the sonic signals and a receiver for the electromagnetic signals, the receivers for the sonic signals being in two positions separated by a base-line distance, there being two receivers, one for each sonic signal, in one said position and a receiver for one of the said sonic signals in the other position, while the station having the said receivers is provided with timing means for determining the elapsed times between the reception of the electromagnetic signal and the reception of the respective sonic signals.

REFERENCES:
patent: 2910665 (1959-10-01), Hawkins
patent: 4055830 (1977-10-01), Wilson et al.

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