PREFACE 



This is the 63rd in a series of annual reports on the International Ice 

 Patrol Service in the North Atlantic Ocean. It contains information on Ice 

 Patrol organization, communications and operations, and on ice and environ- 

 mental conditions and their relationships in 1977. 



The authors of this report, Lieutenants K. N. KNUTSON and T. J. 

 NEILL, USCG, acknowledge applicable ice, weather and oceanographic data 

 provided by the Canadian Department of the Environment, U.S. National 

 Weather Service, U.S. Naval Weather Service and U.S. Coast Guard Oceano- 

 graphic Unit. Recognition is given to Chief Marine Science Technician 

 N. O. TIBAYAN, Marine Science Technician First Class C. W. JENNINGS, 

 Marine Science Technician Third Class J. D. STEELMAN and Yeoman 

 Second Class T. L. GEST, all USCG, for their assistance in the preparation 

 of this manuscript, and illustrations for this report. 



The U.S. National Aeronautical and Space Administration contribution 

 to the continuing effort to devise an all-weather method of detecting and 

 identifying icebergs is gratefully acknowledged. 



The continued cooperation and generosity by Canadian Coast Guard 

 Radio Station St. John WON is worthy of particular note and gratitude. 



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