pleated and Erergreeti procee(l(Ml into Boiiavista Bay to conduct iceberg 

 tleniolition tests wliich liave been described in tlie ])receding section of 

 this bulletin. 



After conii)l(^ting' the (hMnolition tests, the Evergreen returned to 

 Argentia on 18 Jun(> and (h'parted from tliere on 17 June to conduct 

 the fourtli oceanographic survey which covered the waters over and 

 immediately seaward of tlie soutliern and eastern slopes of the Grand 

 Banks from just westward of the Tail of the Banks to the latitude of 

 Flemish Cap. This survey included 86 stations taken between 18 

 June and 1 July with the work of collection of data beginning at the 

 southwestern end of the area and progressing northward. Between 

 stations 7467 and 7468, 36 liours were lost when the loran receiver 

 Iransformei' l)urned out and a spare one liad to be flown down from 

 xVrgentia. The survey resumed after a successful airdrop was made. 

 At station 75.')7, the fourth survey was completed and Evergreen pi'o- 

 ceeded to St. Johns, Newdonndland, \ov a brief perio<l of rest and 

 relaxation. 



On 5 July, Evergreen (h'[)arted St. Johns to <'omfuct the 1960 post- 

 season cruise wliicli was to inchi(h' an occupation of the Bonavista 

 triangle and a section across tlie Jjabrador Sea- from South Wolf Island, 

 Labrador to (^ape Far(>w(>ll, Greenland. The 30 stations of tlie Bona- 

 \nsta triangle were occu|)ie(l between 6 and 8 July after which tlie 

 Evergreen proceeded to within 5 miles of South Wolf Island to com- 

 mence the Labrador Sea section, where on 10 July, tlu: work of collec- 

 tion of data was resumed. The survey proceeded without interruption 

 mitil shortly after the taking of station 7588, located on the Greenland 

 continental slope, heavy concentrations of storis were encountered. 

 At station 7588, Evergreen was ap|)roxima(ely 'MS miles off Cape Fare- 

 well. Evergreen tlien proceeded skiwl\' tlu'ougli various l(>ads in the 

 ice until at 17 miles from (^ape Farewell an<i still 5 miles sjiort of pro- 

 posed station 7589, the ice became impassable. An attempt was made 

 to take station, but the i'apidl_\' moving ice floes tlireatened to close in 

 on tlie shi|). As there was no indication of more favorable ice condi- 

 tions in the near future, the siu'vey eiuh'd and Evergreen returned to 

 Boston via Ai'gentia and AVoods Hole. Thus ended the 19()0 oc(>ano- 

 graphic data collection. 



The ocean()gi-a])liic work was under the supervision of Lt. P. A. 

 Morrill who was assisted by Lt. (jg.) T. F. Budinger for the first, 

 second, and third surveys, and by Oceanographer AflVed P. France- 

 sclietti for th(> fourth and postseason surveys. Othei' assistants in 

 the observational work included R. (\ Xorris, aerograi)her's mate first 

 class; F. .\. Bi'own, yeoman first class; D. P. Wagnei-, aerographer's 

 mat(> second class; W. (\ ( \-ir[)('nt cr, yeoman second class, and L. E. 

 Dawson, aei-ographer's mate third class. Temperature and salinity 

 observations were made at each of the 325 stations. At the 21 sta- 

 tions forming tlu; section across the Lahi'ador Sea, the ohservations 



32 



