16 



operations for seven complete days. The percentage of time with, 

 visibility less than 2 miles was 43.3. 



The following is a summary of the ice and water temperatures reports 

 received during the present cruise: 



Number of different bergs south of latitude 48° 32 



Number of different bergs south of latitude 43° 3 



Number of ice reports received 127 



Number of water temperature reports received 1, 096 



Number of ships furnishing ice reports 47 



Number of ships furnishing water temperature reports 170 



Number of ships reported for violation Track Agreement 3 



Number of ships furnished special ice information 9 



Number of special broadcasts transmitted 12 



Figure 5 shows the ice conditions and surface isotherms for the 

 fifth cruise. 



SIXTH CRUISE, "PONTCHARTRAIN," JUNE 17 TO JULY 2, 1932 



The Pontchartrain sailed from Halifax, Nova Scotia, at 11 a. m., 

 June 15, 1932. The run to the relieving point was made in a dense 

 fog. The Tampa made contact with us at 8 a. m. June 17 in latitude 

 43° 04' N., longitude 53° 16' W. The ice observation party reported 

 abroard and the Pontchartrain relieved the Tampa as ice-patrol 

 vessel. 



The ice-patrol vessel proceeded eastward to longitude 51° 00' W. in 

 dense fog and then drifted. Fog prevented all scouting operations 

 until June 22. On June 19 the General Greene made contact with the 

 Pontchartrain and delivered a current map of the ice-patrol area, just 

 completed. The General Greene then proceeded to St. John's, 

 Newfoundland. 



On June 22 the Pontchartrain scouted just south of the tail of the 

 banks from longitude 51° 20' W. to 49° 44' W. At this point fog 

 again set in. The following day w^e had five hours with visibility 

 more than 7 miles. During this time the Ponchartrain scouted to 

 the northward along the eastern slope of the banks in the cold water 

 to latitude 43° 36' N. June 24 and 25 were spent drifting in a dense 

 fog. On June 26 the Pontchartrain, with good visibility, scouted to 

 the northward along the eastern slope of the banks from latitude 

 43° 40' N. to latitude 47° 00' N. 



June 27, 28, and 29 were spent searching the area eastward from the 

 50-fathom curve to longitude 46° 20' W. and between latitudes 

 47° 15' N. and 45° 30' N. Fog during a part of each day delayed 

 this search. On the night of June 29 the commander, international 

 ice patrol, sent a message to Coast Guard headquarters recom- 

 mending the discontinuance of the ice patrol for the season of 1932. 

 The following day was spent, for the most part, drifting in a dense 

 fog. At 11.30 a. m. a metal tank approximately 10 feet high and 



