Birds, fish and other migratory creatures have long been the envy of the U.S. Navy, which would like to learn to navigate with their casual accuracy. In its latest effort to understand animal travel tricks, the Office of Naval Research has been loading homing pigeons with tiny, transistorized radio transmitters designed by American Electronic Laboratories, Inc. of Philadelphia. Despite four batteries and a 40-in. trailing antenna, each transmitter weighs only 2½ oz. and does not overburden an airworthy pigeon. For 20 hours, it sends out a signal that can be picked up by directional receivers tracking the pigeon to its home...
To continue reading:
or
Log-In
