21 June for ice patrol. The Mocoma was met and relieved at 1140 G.c.t., 



22 June, at position 45°21' N., 50°23' W. The Mendota commenced 

 searching along the eastern slope of the banks and on the 23d sighted a 

 berg at 44°33' N., 48°36' W. The Mendota drifted with this berg until 

 the 27th. Its path is shown in figure 16. By the 27th it had been 

 reduced in size to the point of harmlessness. Therefore, on the 27th the 

 Mendota set course to the southwest. On the 28th a small berg was 

 located at 44"28' N., 47°57' W. The Mendota then commenced searching 

 upstream along the eastern slope of the banks. One berg was located 

 near 48° N., 47° W., and another near 48° N., 49° W. These bergs were 

 being set to the east and consequently represented little or no menace to 

 track C. Upon receipt of orders from Commander, International Ice 

 Patrol, the continuous surface vessel patrol for 1948 was terminated at 

 2245 G.c.t., 2 July, at position 46°33' X., 53°00' W. The Mendota 

 immediately departed the area and set course for Argentia, Newfound- 

 land, arriving there on the 3d of July. Figure 16 shows the track plot 

 of the cruise, all ice sighted and its subsequent drift, if determined, and 

 surface isotherms for the period of the cruise. 



Following is a summary' of water-temperatures, ice and obstruction 

 reports received during this cruise: 



Number of ice reports received 23 



Number of vessels furnishing ice reports 17 



Number of water-temperature reports received 383 



Number of vessels furnishing water-temperature reports 110 



Number of obstruction reports received 11 



Number of vessels furnished special information 7 



During the period of this cruise, patrol vessel activity was supple- 

 mented by aerial ice observation flights as follows: On the 24th, two 

 flights were made. Good to excellent weather conditions prevailed 

 throughout almost the entire search area. Only five bergs were located 

 south of the 47th parallel and there was considerable debris in the vicinity 

 of all ice observed. On the 27th and 28th, the same area was covered 

 and in addition was extended northward past the 54th parallel. At 

 this time the only known ice remaining that might become a menace to 

 track C, following the schedule shift of this track on 1 July, were the 

 bergs sighted on the 27th at 47°54' N., 49° 17' W., and at 47°57' N., 

 47°49' W. As stated previously, the Mendota determined the set of these 

 bergs to be easterl3^ Therefore there remained little likelihood that 

 either would menace track C. With the approval of the Commandant 

 of the Coast Guard, shipping was advised that the continuous surface 

 vessel patrol would be discontinued on 2 July. To summarize, a total 

 of 6 flights were made involving 44.8 hours time in flight. 



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