The Tumpa then set course for Ar^entia, Newfoundland, arriving- 

 there on 28 July 1946. 



The following is a summary of water temperature, ice, and 

 obstruction reports received during this cruise : 



Number of ice reports received — 



Number of vessels furnishing ice repoi'ts 



Number of w^ater temperature reports received „.. 



Number of vessels furnishing water temperature reports -. 



Number of obstructions reports received .-_. 



Number of vessels furnished special information - 



11 



10 



___ 447 



. 68 



20 



3 



During- the period of this cruise the surface patrol vessel activity 

 was supplemented by aerial ice observation flights as follows : On 

 17 July two flights were attempted; one PB4Y-1 to extend the 

 southeastern searched area eastward to 43° W., and one PBY-5A 

 to extend the searched area northward to 46° 30' N. Visibility was 

 poor in the southeastern area and because of a radar failure on the 

 PB4Y-1 it returned to base along a course intended to sweep visu- 

 ally the area immediately north of that covered by the PBY-5A. 

 Visibility proved to be poor here also so the only area covered was 

 that jDetween 45°30' N., and 46°30' N., from the Grand Banks east- 

 ward to 43° 10' W. On 22 July two flights extended the searched 

 area eastward to beyond the 43d meridian and northward to 48 N. 



lable of Ice and Obstrucfion Reports, South of 50° N., 1946 



143 



