PREFACE 



This bulletin is No. 46 in the series of annual reports on the Inter- 

 national Ice Patrol and covers the season of 1960. It is divided into 

 two parts. The first is a report of tlie observation operations which 

 extended from 11 ]Marcli to 30 June 1960. Sliip, aircraft and com- 

 munication activities are described in detail and special sections deal 

 with observed monthly ice conditions, experiments in iceberg demoli- 

 tion and statistics on ice and sea temperature reports for 1960. 



The second part comprises a preliminary presentation of the oceano- 

 graphic data collected during 1960. Included are charts of dynamic 

 topography of tlie sea surface (ocean current maps), tables of oceano- 

 graphic (hita, and a brief discussion of the results of tlie season's four 

 oceanographic surveys and the post-season research cruise in the 

 Labrador Sea. 



The authors of the section on oceanography are Floyd M. Soule, 

 Oceanographer, U8CG, Lieut. P. A. Morrill, "USCXI, and Alfred F. 

 Franceschetti, Oceanographer, ILSCG. The remainder was written 

 bv Capt. R. P. Bullard, FSCTi, and Lt. Comdi-. K. P. Dinsmoi<>, 

 USCG. 



