50 



SUMMARY 



During the third cruise of the Modof three icebergs were located, 

 one in 47° 58' north, 52° 37' west, one grounded south of Stinlring 

 Island Light, Newfoundland, and the third w^as first seen on June 5 

 in 48° 21' north, 51° 10' west. We remained by this last berg from 

 the 9th to 18th, inclusive, and followed it as it drifted to 46° 42' 

 north, 52° 00' west on the 15th and then north to 47° 15' north, 

 51° 59' west on the 18th. When the Modoc left this berg on the 

 18th to proceed to meet the 7\wipa^ there was, as far as could be de- 

 termined, no ice south of latitude 47° 15' north. Normal weather 

 conditions w^ere experienced during the cruise. There were no gales 

 with a force of 8 or greater, 4 gales with a force of 6.5 or gi-eater, 

 and an average W'ind force of 3.4. There was 15 per cent of hours 

 Mith fog. The broadcasts and reports to the Hj^drographic Office 

 and Weather Bureau Avere carried out as prescribed in Coast Guard 

 letter of February 4, 1924 (601-612). 



The patrol received 850 surface sea-water temperatures from 134 

 different vessels, 34 w^eather, and 7 wreckage and obstruction reports. 



Sj)ecial ice information was furnished to 26 vessels and 4 were 

 given a special Avarning of their close proximity to an iceberg in the 

 Cape Race route. 



COAST GUARD CUTTER " TAMPA," COMMANDER W. J. WHEELER, 

 ICE PATROL, FOURTH CRUISE, JUNE 19 TO JUNE 30, 1924 



The Tainya left the fuel oil docks, Halifax, at 10.50 a. m., June 

 17, to proceed for the relief of Modoc on fourth ice patrol cruise. 

 Course was laid north of Sable Island for Cape Race. Fresh to 

 gentle SW. breezes, with clear weather, w^as experienced on 17th 

 and 18th. The 19tli began with rain, followed by mist and fog, 

 which continued all day with moderate to fresh breezes from WSW. 

 to W. 



The Modoc was met at 6.45 a. m., June 19, in latitude 46° 04' north, 

 longitude 55° 01' west. Lieut. E, H. Smith, the ice observer, and 

 his assistant. Yeoman Leivis, transferred to Tampa and this vessel 

 assumed ice patrol. 



The ice situation was summarized as follows: One berg and three 

 growlers were in latitude 47° 15', longitude 51° 59' on June 18, and 

 when left on that date they were drifting north at rate of 10 mile& 

 per day. This berg was comparatively shallow in draft, therefore 

 both berg and growlers were largely under influence of the wind. 

 No other ice had been seen or reported in the off-shore Atlantic. 



At 7.46 the Tampa proceeded on course 70° true for Cape Race,, 

 moderate speed, in fog. Modoc directed to proceed to Halifax. 



