tected. Fog persisted throughout the 17th and 18th. At 0400 

 G. c. t. on the 18th the Acushnet was relieved by the Tampa and 

 course was set for Argentia which port was reached 19 April. 



Fog was encountered every day of the cruise except on 27 and 28 

 March and on 2, 3, 5, 12, and 16 April. The highest winds encoun- 

 tered were force 10 from the south on 27 March. These winds lasted 

 approximately 7 hours and then rapidly moderated. Meteorological 

 observations and reports were restricted to six hourly synoptic 

 weather reports. 



Following is summary of water temperature, ice, and obstruction 

 reports received during this cruise : 



Number of ice reports received 36 



Number of vessels furnishing ice reports 24 



Number of water temperature reports received 525 



Number of vessels furnishing water temperature reports 86 



Number of vessels furnished special information 32 



The 12 ice observation flights made during this cruise are discussed 

 in the description of ice conditions for March and April. 



Second Ice Patrol Cruise, "Tampa," 16 April to 5 May 1950 



On Sunday, 16 April the Tampa departed Argentia antl proceeded 

 to relieve the Acushnet in the vicinity 43°50' N., 49°00' W., early on 

 the morning of the 18th. After effecting relief, the Tampa started 

 scouting the area for icebergs previously reported. On 19 April a 

 berg was sighted in 44°24' N., 48°40' W., and two growlers in 44°02' 

 N., 48°42' W. The search was continued along the southeastern 

 edge of the Grand Banks through the 19th and 20th and on the 21st 

 bergs were sighted in 44°30' N., 48°34' W.; 44°41' N., 48°42' W.; 

 44°45' N., 48°24' W.; 44°46' N., 48°32' W., and a growler in 44°43' 

 N., 48°21' W. Visibility was excellent on the 22d and bergs were 

 sighted this date in 44°12' N., 48°55' W.; 44°15' N., 48°47' W. 

 The Tampa continued drifting with the latter two bergs until they 

 reached position 43°13' N., 49°16' W. At this time the bergs were 

 reduced in size and disintegrating rapidly. Upon receipt of orders 

 from Commander, International Ice Patrol on 25 April, the Tampa 

 departed these bergs to search for the boundaries of the cold wall 

 between latitudes 41°40' N., and 43°00' N., between longitudes 

 48°00' W., and 50°00' W. The 50° isotherm which approximated 

 the cold wall was located in the following positions: 41°40' N., 

 48°35' W.; 42°15' N., 48°20' W.; 42°25' N., 47°50' W. 



A westerly gale was experienced the afternoon and night of the 

 27th which prevented any effective scouting. On the 28th the area 

 between 42°00' N., and 43°00' N., and 49°00' W., and 50°00' W., 

 was searched but no ice w^as sighted. An ice patrol plane sighted 

 a berg in 43°10' N., 47°57' W., with several growlers in the vicinity 



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