1. Navigational History
(Mariners Education/Navigation)

... the installation of the first radiobeacon. The first prototype shipborne radar system was installed on the USS Leary in April 1937. On November 18, 1940 Mr. Alfred L. Loomis made the initial suggestion ...

2. Marine Navigation
(Mariners Education/Navigation)

... line with each other Compass bearing to a charted object, Radar range to a charted object, On certain coastlines a depth sounding from echo sounder or hand lead line. There are some methods seldom ...