The Imperial Navy developed an excellent receiver for this purpose in 1921, and shortly most of the Japanese warships had this equipment. Although the RUS-1 transmitter was in a cabin on the rear of a truck, the antenna had to be strung between exterior poles anchored to the ground. A second truck carrying the electrical generator and other equipment was backed in opposition to the transmitter truck. Two receivers had been used, every in a truck-mounted cabin with a dipole antenna on a rotatable pole extended overhead. In use, the receiver trucks have been positioned about forty km apart; thus, with two positions, it will be attainable to make a rough estimate of the vary by triangulation on a map.
Newer techniques of VHF radio communications and path-finding might also be used, however a...Read More