54 



the signals str:)ng; the other from the S. S. Montdare at a distance 

 of 1,700 miles, which also reported the signals strong. 



The new Coast Guard modified receiver, type BC-131, was hooked 

 up and used during the entire patroj in order to give it a thorough 

 test. It was found that, with some minor adjustments, this receiver 

 would be entirely satisfactory and its efficiency equal to the Navy 

 tj^pe 1420. 



It was found impracticable to operate the 50-watt tube set which 

 was located on the bridge, on account of the exceptionally cold 

 weather. 



The 50-watt telephone set was used when relieving, constant com- 

 munication being maintained between the vessels from the time they 

 were 225 miles apart until they met. 



A large amount of traffic was handled during this patrol. It was 

 estimated that approximately 195,000 words were received and sent. 

 Transmitters were in continuous operation about 80 per cent of the 

 entire patrol period. The spark transmitter was used for the 706- 

 meter broadcast instead of the ICW, the latter transmission being 

 too sharp and causing many requests for repetitions. 



The phone attachment on the 2-kilowatt tube transmitters was 

 not tested on account of lack of time due to heavy patrol traffic. 



THIRD CRUISE, APRIL 23-MAY 8, "TAMPA" 



During this cruise, on April 30, the starting box of the motor 

 generator was found out of order. It was examined and found 

 that the contactors on the second step of the starter did not release 

 when stopping the machine, thereby throwing the full load on the 

 motor when starting the machine again. Minor adjustments were 

 made to the contactors and the machine placed in working order. 

 This trouble, however, did not delay any of the schedules. 



A new arrangement was made during this cruise whereby the ship 

 at Halifax checked the traffic with NBD (Bar Harbor), relaying the 

 messages, if necessary. This enabled the patrol to keep in constant 

 and direct communication with NBD. The arrangement was as 

 follows : 



Commencing at 11.30 G. C. T., April 29, tlie vessel on patrol will call the 

 vessel in port immediately after the completion of the spark broadcast on 1,621 

 meters CW. for immediate transmission of traffic to NBD. If the traffic is not 

 received before 12 G. C. T., the time for CW. broadcast, the patroling vessel 

 will call again after the CW. broadcast. The operators of vessel in port must 

 remain on watch until the traffic is cleared. This procedure will be carried out 

 in the evening after the spark broadcast, and if necessary, immediately after the 

 CW. broadca.-it requiring watch until 23.30 or whenever the traffic is cleared. 



Tliis arrangement was probably the best that could be made to 

 absolutely insure the passage of the traffic, as all messages could bo 

 classed under the heading of perishal)le — that is, the infonnatit^i 



