Number of ice reports received 75 



Number of vessels furnishing ice reports _ 69 



Number of water temperature reports received - 519 



Number of vessels furnishing- water temperature reports - 89 



Number of obstruction reports received 28 



Number of vessels furnished special information 18 



During the period of this cruise the ice scouting of the surface 

 patrol vessel was supplemented by aerial ice observation flights as 

 follows: On 21 June two flights covered the area from 43° N., to 

 46°40' N., between 50° W., and a line from 43° N., 47°30' W., to 

 47° N., 42°30' W., except for a small area near the eastern edge of 

 the Grand Banks at about 45° N. 



Ninth Cruise, "Modoc." I July fo 15 July, 1946 



The Modoc departed Argentia, Newfoundland, at 0900 G. c. t. 

 on 30 June 1946, for ice patrol. The Tampa was met and relieved 

 as surface patrol vessel at 45°34' N., 49°10' W., at 1100 G. c. t. 

 on 1 July 1946. After beginning a sweep down the eastern edge 

 of the Grand Banks the sweep was abandoned at 0952 G. c. t. on 

 2 July, 1946, and course changed for a position of 45° 14' N., 50° 19' 

 W., to search for a dory and crew lost from the Portuguese fishing 

 vessel Maria Frederico in dense fog. The search continued until 

 the night of 4 July 1946, when the Modoc hove to. The morning 

 brought better visibility and the search was resumed southward. 

 Shortly afterward the Maria Frederico reported the return of the 

 missing dory and crew. 



A general summary of the weather for the period of this cruise 

 follows. Five cyclonic disturbances with four weak fronts affected 

 the weather. A weak warm occlusion passed the area on 1 July 

 and was accompanied by heavy fog that persisted until the 5th 

 when a cold front passed, clearing the fog and bringing clear to 

 partly cloudy weather until the 8th. A weak poorly defined front 

 passed on the 9th accompanied by heavy fog that recurred inter- 

 mittenly for the next 2 days. Another weak indefinite front passed 

 the area on the 11th. The effects of the tropical disturbance that 

 passed up the Atlantic coast and then out to sea were felt on the 

 13th and 14th. Moderate to heavy swells and winds of force 7 with 

 occasional gusts to 40 knots persisted for 2 days. Short periods of 

 light to moderate rain accompanied all fronts. Winds were from 

 the south-southwest to west until 7 July when the direction changed 

 to southeasterly for a few hours after which it returned to south- 

 west. Winds from the northwest and north occurred for a few 

 hours on the 10th. The average force was 4 to 5 with force 6 and 

 7 occurring on the 4th, 13th and 14th. The average daily maximum 



740743—47—10 



141 



