History of development of lighthouses and allied equipment; various types of apparatus in use and requirements to be met by each type of aid; possible applications of electrical art to increasing safety of shipping; fog signals; nautophones and diaphones; radio communication with lighthouses. (See also - discussion p 139-44)
Lighthouses and other aids to navigation
South African Inst Elec Engrs -- Trans
1946
15 pages
Article (Journal)
English
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