PREFACE 



This report is 58th 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, on ice and environmental conditions and their relationship 

 in 1972, and on the dynamic topography surveys conducted during April, 

 May and June 1972. 



The author of this report, LT Douglas W. CROWELL, USCG acknowledges 

 ice and weather data supplied by the Canadian Department of Transport, 

 weather data supplied by the U.S. National Weather Service, weather 

 and oceanographic data supplied by the U.S. Coast Guard Oceanographic 

 Unit. Acknowledgement is also made to Yeoman First Class Bruce S. COLLINS, 

 USCG, Senior Chief Marine Science Technician Paul R. FLOWERS, USCG, 

 Marine Science Technician First Class James A. SHAFER, USCG, Marine 

 Science Technician Second Class Joseph C. DELWICHE, USCG, Marine Science 

 Technician Third Class Larry D. STARK, USCG, and Marine Science Technician 

 Third Class James M. GAYNOR, USCG for assistance in the preparation of 

 the manuscript and illustrations for this report. 



In January 1972, FINLAND became the eighteenth nation to sponsor 

 the International Ice Patrol joining Belgium, Canada, Denmark, France, 

 Germany, Great Britain, Greece, Israel, Italy, Japan, Liberia, 

 Netherlands, Norway, Panama, Spain, Sweden, United States of America, 

 and Yugoslavia. 



The generosity and cooperation given by the Canadian Forces in 

 permitting the International Ice Patrol to operate from their base at 

 Summerside is gratefully acknowledged. 



