62 



Xo seals Avere seen during the j^atrol and only a few schools (;(' 

 whales and porj)oises came in rieM'. 



RADIOCOMPASS, CAPE RACE 



The ]-atrol Missels had reason to use radiocomj'ass l)ea2'ings all 

 diu-ing the season due to tlie great amount of fog. TJiese bearings 

 were obtained through the kindness and cooj^eration of the C'upc 

 Race Radio Station. The bearings were, available ])ractically at all 

 times, a service highly a})])reciated. Although usually confined to 

 foggy weather, a test of the acciu'acy was made by the patrol vessel 

 on numerous occasions dming cknir weather wlien sights Avere obtain- 

 able. It was foimd that when the vessel was within the area bounded 

 by latitudes 42° and 43° N., and longitudes 48° and51° W., an error 

 between three and five miles ap])lied to the left (facing Cape Race) 

 gave excellent results for a new line of bearing, usually cutting the 

 position determined by sights. WTienever the vessel was between 

 latitudes 44° and 46° N., and longitudes 47° and 49° W., an error 

 of three miles applied to the left, facing Cape Race, for the new line 

 of bearing proved very accurate. Caj^e Race is to be complimented 

 on its extreme accm-acy. A j)oint worthy of comment was the fact 

 that Cai:)e Race invariabl}^ made known to the initrol vessel whether 

 the bearing was good, a]:)]7roximate, or doubtful. 



RADIOCOMPASS, CUTTERS 



The radiocomp asses ]:)roved to be an invaluable aid in foggy weather 

 when the patrol vessels relieved each other. At the time of the 

 gi'ounding of the Savgys the bearing obtained by the radiocom])ass 

 enabled the ixntrol vessel to head directly for the Sav{/vs without 

 undue delay. 



MINES 



In mining it was found necessary in all cases to detonate tJie 150- 

 pound mines by firing a small T. N. T. mine, the detonator furnished 

 being either too small for the large mine or tlie space sm'rounding 

 it too large. The detonator usually fu'ed, bursting the primer charge 

 case but not setting off the jirimer. When the larger mine was de- 

 tonated b}' the smaller mine, two sej^arate and distinct ex])losions 

 were felt with quite a percej^tible interval between them. 



VIOLATIONS 



Only two vessels were reported for violation of the track agree- 

 ment. These vessels were sighted by the patrol close by large ice- 

 bergs, well to the northward of the authorized steamshi]-) lanes. 



