60 INTERNATIONAL, ICE OBSERVATION AND ICE PATROL SERVICE. 



that it no longer constituted a menace to shipping. The only ice 

 found south of the Tail of the Bank during the last half of the month 

 was a small growler, which was observed in 42° 19' N., 50° 46' W. 

 (See chart "K"). During this period fog enveloped the entire cold- 

 water area, making the search for ice very difficult and almost im- 

 possible. 



Several currents were noted by means of astronomical positions, as 

 follows: April 4, in 42° 56' N., 50° 00' W., a 0.2-knot current was 

 observed setting 246°, true; April 6, in 41° 48' N., 50° 30' W., a 1- 

 knot cun-ent was observed setting 68°, true; April 8, in 41° 48' N., 

 49° 50' W., a 1-knot surface current was observed setting 85°, true. 

 On April 27, while the vessel was at anchor, with very smooth sea 

 and light airs, current observations were made in 43° 45' N., 50° 25' 

 W., and a surface current of a rotary tidal character, the same as 

 found in this locality in 1915 and 1921, was noted. 



During the first half of the month northerly winds prevailed, while 

 during the second half the wind blew steadily from the SE. quadrant 

 and much fog was encountered. This is shown graphically on the 

 wind diagrams of the surface temperature charts and also on the 

 wind diagram and f o^ scale, figure 1 . 



To sum up : The Gulf Stream advanced northward 30 miles south 

 of the Tail of the Bank. The " knuckle" which was observed so often 

 during 1921 was again observed during this month, and extended to 

 41° N., 48° W. The ice observed consisted of two bergs and a few 

 growlers south of the Tail of the Bank and of three small ber^s and 

 two growlers on the Grand Banks. Northerly winds prevailed from 

 the 1st to the 15th, when they were succeeded by southeasterly 

 winds and fog. Fog was present 24 per cent of the month, and low 

 visibility and fog 53 per cent of the month. 



MAY. 



During the month of May, north to northwesterly winds, with good 

 visibility, prevailed. The clear weather permitted the patrol vessels 

 to locate all the bergs around the Tail of^ the Bank ana to plot their 

 drift tracks with accuracy. (See berg charts "E" and "F," and 

 temperature charts "L" and "M.") 



Berg "D" was reported on April 17, in 43° 35' N.. 48° 20' W., the 

 sea-water temperature in its vicinity at the time being 38° F. This 

 berg was first observed by the patrol May 2, as shown on berg chart 

 "F. ' Its track is shown on succeeding days of the month as it was 

 followed by the patrol vessel. It was a large berg when observed 

 May 2, but was a mere crrowler when last seen, on May 22. In 33 

 days it had drifted 250 miles at an average rate of 0.32 knot per hour. 

 The drifts of bergs "E," ''H," and "J" are also shown on borg chart 

 "F." Bergs "F" and "G" arrived off the Tail of the Bank about 

 May 17, or two weeks after the bergs shown on chart "F." Their 

 drift is shown in chart " E." It will be noted that bergs " F" and " G " 

 did not (h'ift to the southwest of tlio Tail of the Bank, ])ut continued 

 nearly (hie south and then easterly into the " knuckle." The cause for 

 the (hd'crence in the drift of these bergs is explained in the summary 

 of oceanographic conditions, page 95. 



On May 7, berg "K" was reported in the position shown on chart 

 "E," It was also observed on May 9 and 10. During this three-day 



