Outstanding development in marine radio during 1927 has been equipping of ships with vacuum-tube transmitters; adoption becoming general; range of communication increased; more ships reached direct; Great Lakes needs; radio compasses, radio beacons, etc.
Marine radio progress in 1927
Shipg. Illustrated
Shipping Illustrated ; 21 , n 12 ; p 26 + 28
1928
Aufsatz (Zeitschrift)
Englisch
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