COMMUNICATIONS 



From 10 March to 14 July ice information 

 was broadcast twice daily to shipping by U. S. 

 Coast Guard Radio Station (NIK) at 0048 and 

 1248 G.M.T. simultaneously on 155, 427, 5320, 

 8502, and 12880.5 KHZ. Each broadcast was 

 preceded by the general call CQ on 500 KHZ 

 with instructions to shift to the above operat- 

 ing frequencies. A two minute series of test 

 signals transmitted on the operating frequen- 

 cies facilitated receiver tuning. Each broadcast 

 was transmitted twice, once at 15 words per 

 minute and again at 25 words per minute. Pre- 

 scribed radio silent periods were observed. Ice 

 Bulletins were also sent via teletype to the U. S. 

 Naval Oceanographic Office, Washington, D. C. 

 for further dissemination twice daily by U. S. 

 Naval Radio Station Washington (NSS) on 

 their regular daily "HYDRO" broadcasts, for 

 inclusion of a daily ice chartlet in the daily 

 memorandums, and for a weekly ice chartlet. 

 Ice Bulletins were also sent to the Canadian 

 Department of Transport, R.C.N. Radio Station 

 Albro Lake, N.S.; and others for further dis- 

 semination. 



Ice conditions were also transmitted by fac- 

 simile at 1330 G.M.T. daily on 5320, 8502, and 

 12880.5 KHZ. 



Duplex radio operations were used between 

 NIK and merchant ships for general radio com- 

 munications. Merchant ships worked NIK on 

 500 KHZ and 8 and 12 KHZ maritime calling 

 bands. NIK worked 427, 8734, or 12718.5 KHZ 

 as appropriate. 



During the 1967 season, CG Radio Station 

 Argentia (NIK), the Ice Patrol radio station, 

 handled 3071 radio messages and 12,809 land- 

 line messages of which 253 were ice broadcasts 

 and 253 were teletype ice bulletins. Statistics 

 concerning the reports received from shipping 



during the ice season are as follows: 



Number of ice reports received from vessels 569 



Number of vessels furnishing ice reports 211 



Number of sea surface temperatures reported 3,194 

 Number of vessels furnishing sea surface 



temperatures 285 



Number of vessels requesting 



special information 34 



The percentage distribution of reporting ves- 

 sels by nationality was as follows: 



United Kingdom 25.4 



United States of America 20.6 



Federal Republic of Germany 10.5 



Netherlands 8.9 



Norway 6.6 



France 3.3 



Sweden 2.9 



Belgium 2.5 



Canada 2.2 



Liberia 2.2 



Italy 1.8 



Israel 1.7 



Denmark 1.5 



Greece 1.5 



Union of Soviet Socialist Republics 1.4 



Yugoslavia 1.4 



Ireland 1.2 



Poland 1.1 



India 0.7 



Finland 0.6 



Japan 0.5 



Portugal 0.3 



Spain 0.3 



Argentina 0.1 



Honduras 0.1 



Iceland 0.1 



Jamaica 0.1 



Mexico 0.1 



Nigeria 0.1 



Pakistan 0.1 



Panama 0.1 



Venezuela 0.1 



Total 100.0 



