Research conducted on depthmeter for piloting ships by means of frequency modulation principle; it has been observed that depth was exactly in conformity with measurement shown by depth indicator irrespective of character of bottom, condition of river bed, nature of water, or surge caused by ship engaged in taking measurements.
Direct-Reading depthmeter for piloting ships in rivers
Electrotech J (Japan)
Electrotechnical Journal -- Japan ; 2 , n 10
1938
2 pages
Article (Journal)
English
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Electro-magnetic piloting of ships
Engineering Index Backfile | 1921
|Online Contents | 1994
|Online Contents | 1994
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