COMMUNICATIONS 



Ice Patrol communications included reiDorts of 

 ice and environmental conditions, ice bulletins, ice 

 broadcasts, fascimile charts, and administrative 

 traffic necessary to operate the patrol. The Ice Bul- 

 letin was disseminated by teletype from the Ice 

 Patrol office to a number of organizations, includ- 

 ing the U.S. Navy, the Canadian Department of 

 Transport, and the Canadian Armed Forces. Some 

 of the ice bulletins were re-broadcast by U.S. Naval 

 Station Kadio Washington (NSS) and Canadian 

 Maritime Command Kadio Station (CFH). 



Tables 2 and 3 present Ice Patrol communica- 

 tions statistics for the period September 1968 

 through August 1969. 



Ice Patrol Radio Station (NIK) transmitted 

 the Ice Broadcast to shipping daily at 0018 and 

 1218 G.m.t. Each transmission was preceded by 

 the call CQ on 500 kHz with instructions to shift 

 to 427, 5320, 8502 or 12880.5 kHz to receive the Ice 

 Broadcast. After a two-minute series of test sig- 

 nals transmitted on the operating frequencies 

 given above, NIK transmitted the Ice Broadcast, 

 fii-st at. 25 words per minute, and then at 15 words 

 per minute. Ice Patrol Radio Station (NIK) also 



Table 2. — Communications Statistics 



Number of ice reports received from ships 139 



Number of ships furnishing ice reports 33 



Number of sea surface temperature reports 1985 



Number of ships furnishing sea surface temperature . 211 



Number of ships requesting special information. . . 11 



Number of NIK Ice Broadcasts 246 



Number of NIK FAX Broadcasts 123 



transmitted a facsimile chart of ice conditions at 

 1330 G.m.t. daily on 5320, 8502, and 12880.5 kHz 

 with a drum speed of 60 r.p.m. For general radio 

 communications with merchant shipping, NIK 

 used duplex operation. Merchant sliipping, after 

 calling on 500 kHz, or the 8 or 12 niHz maritime 

 calling bands, shifted to their working frequency 

 and NIK worked on 427, 8650, or 12889.5 kHz. 



Table 3. — Percentage Distribution by Nationality of Ships 

 furnishins Ice or Sea Surface Temperature Reports 



United Kingdom 29. 3 



United States of America 16. 9 



Federal Republic of Germany 11. 2 



Norway 7. 3 



Liberia-. 6. 8 



France 5. 6 



Sweden 3. 4 



Belgium 2. 3 



Italy 2. 3 



Canada 1. 7 



Netherlands 1. 7 



Union of Soviet Socialist Republics 1. 7 



Denmark 1. 1 



Iceland 1. 1 



Israel 1. 1 



Switzerland 1. 1 



Cuba 6 



Finland 6 



Greece 6 



Japan .6 



Poland 6 



Spain .6 



Turkey .6 



Yugoslavia 6 



New Zealand .6 



11 



