INTRODUCTION 



This pamphlet deals soleh' with the 1930 International Ice PatroL 

 Tlie text is shorter than that of recent ice patrol bulletins, but the 

 figures, especially the surface isotherm charts, show more detail than: 

 usual. Ice, weather, and other conditions that prevailed southeast 

 of Newfoundland during the spring and early summer of 1930 are 

 systematically outlined. The arrangement of the subject matter is 

 similar to that which has been followed for a number of years. This 

 makes for ease in comparing one year's conditions with another's. 

 Indeed, the whole 1930 International Ice Patrol was carried out in 

 accordance with what might be called the standard practice. 



During the season the United States Coast Guard cutters Mojave 

 and Modoc, each made four cruises to the ice regions and the Tampa 

 made one. Capt. Cecil M. Gabbett, in addition to being in command 

 of the Mojave, was commander, International Ice Patrol. Lieut, 

 Commander N. G. Ricketts, was detailed to remain with the patrol 

 throughout the entire season. He transferred from ship to ship at sea 

 and acted as an aide in ice patrol matters to the commanding officers 

 of the patrol vessels, accumulating at the same time the data found 

 in this report. 



Figure 1, facing this page, shows the region in which the Inter- 

 national Ice Patrol operates. It also show^s those portions of the 

 principal steamship tracks that benefit most from the patrol's regular 

 radio ice information broadcasts. 



CRUISE REPORTS 

 ICE OBSERVATION CRUISE, "TAMPA," FEBRUARY 11-27 



Icebergs in 1930 appeared off the Grand Banks of Newfoundland 

 very much earlier than usual. Accordinglj', on February 11, the 

 Tampa left Boston, Mass., in obedience to orders from United States 

 Coast Guard headquarters, to make an ice observation cruise. The 

 Tampa reached the Tail of the Grand Banks 48 days earlier in the 

 year than the first ice-patrol vessel did in 1929, but nevertheless ice 

 conditions were found to be so menacing that it was deemed advisable 

 to establish at once the regular 1930 patrol service. The lampa 

 searched for ice, collected ice and other information from shipping,, 

 and broadcast detailed summaries of conditions in the usual manner 

 until she was relieved of the patrol duty b}' the Mojave on February 27, 



(1) 



