0/ 



■'> stron*:: and wliolc fjjnlc on the northern part of the Grand Bunks 

 on tiie 23(1 instant. Tomperaturi's taken indieatefi a larj^fT volume 

 of Arctic water around the Tail of the Bank than at the same season 

 last year. Icebei^s actually seen by the patrol vessel menaced the 

 steamship lanes less than at this season last year, the lowest actually 

 seen being near the 43d parallel and apparently setting in on SW. 

 slope of the Bank. The berg reported by an unidentified Norwegian 

 motor ship as in lat. 41° .54', long. 49° 52', on the 26th, was not 

 found b}' the patrol vessel nor seen by another vessel which passed 

 near that po.sition about the time of the report. The berg reported 

 by the steamship EstJionia in lat. 41° 42', long. 50° 32', on the 30th, 

 also could not be found by the patrol vessel. In neither case, how- 

 ever, did the weather afford the opportunity of making a thorough 

 search. Either or both reports may have been enoneous, but the 

 possible danger to the normal westbound steamship track was too 

 serious to be disregarded, and no pains were spared to secure con- 

 firmatory evidence. 



On this cruise 15 oceanographic stations were occupied, including a 

 line of stations as far north as the axis of the GuUey off Cape Race. 

 Eleven ice reports were received from steamships and four bergs were 

 sighted by the patrol vessel. In the aggregate, 28 vessels were 

 warned or given ice information, and 871 water temperature reports 

 were received. 



Ice information was broadcast twice daily on 600-meter wave 

 length and once daily on 2,300-meter wave length, each warning 

 l)eing repeated three times. Ice information was sent daily to the 

 Hydrographic Office and weather reports were sent twice daily to the 

 Weather Bureau. Washington. 



COAST GUARD CUTTER " MODOC," COMMANDED B. M. CHISWELL, 

 ICE PATROL, FOURTH CRUISE, JUNE 30 TO JULY 12, 192.3. 



The Modoc left Halifax at 10 a. m., June 30. and met the Tampa 

 at 11.45 p. m., July 2. in lat. 41° 50', long. 52° 50'. The oceanographic 

 observer was transferred to the Modoc, which then took over the 

 duties of the ice patrol. The Modoc left Halifax in thick weather and 

 experienced WSW. to SSW. airs and breezes, with dense fog, until 

 midnight of July 1. On July 2 we were in the warm water of the 

 Gulf Stream, witii clear weather. Thick fog prevailed at the time of 

 meeting the Tdtnpo. 



July 3: Light E. airs and breezes. Clear weather with excellent 

 visibility and intervals of fog. We ran to the position of the berg 

 reported by the Esthonia on June 30 in lat. 41° 42', long. .50° 32'. and 

 searched along its line of probable drift. About 12.45 p. ni. the 

 vessel crossed the line separating the Gulf Stream from Arctic waters. 

 This \'mt- was quite distinct and could be seen for miles in either 



