TABLE OF CONTENTS 



Preface 3 



International Ice Patrol 1971 4 



Aerial Ice Reconnaissance 6 



Conmunications 8 



Ice Conditions, 1971 Season: 



September through December 1970 9 



January 1971 9 



February 1971 10 



March 1971 10 



April 1971 11 



May 1971 12 



June 1971 12 



July 1971 13 



August 1971 13 



Long Term Trends in the Iceberg Threat in the 



Northwest Atlantic 15 



