what sonar device let morse code messages be sent underwater from a submarine in 1915
Fessenden oscillator The device could also be used as an underwater telegraph, sending Morse code through the water. The Fessenden underwater signalling apparatus, or more usually just "The Fessenden", was fitted to Royal Navy submarines in World War I.[3] British K-series submarines were equipped with Fessenden oscillators starting in 1915. However, a submarine signalling the surface could be heard by any nearby (enemy) hydrophone, so the system had restricted utility during wartime patrols.[4]
Charles Dudley Warner Everybody complains about the weather, but nobody does anything about it.[4]
Lucius Accius Atreus featured the line oderint dum metuant ("let them hate, so long as they fear"), later an infamous motto of Caligula.
Alfonso Arau Alfonso Arau InchÃ¡ustegui (born January 11, 1932) is a Mexican actor and director.[1]