52 



(b) Auxiliary transmitting seL— Navy model SE 1205, 2-kilowatt spark set; 

 reliable transmitting range under average conditions, 500 miles daylight and 

 700 miles night; wave-length 600, 706, and 800 meters. 



(c) Main receiving set. — Navy type SE 1420C intermediate wave receiver; 

 wave-length range 450-7,500 meters; and type SE lOOOF two-stage audio- 

 frequency amplifier. 



(d) Short-wave transmitting set. — Coast Guard model T-1; 50-watt ICW and 

 phone transmitter, used for experimental purposes and for communication 

 between the patrol vessels; reliable transmitting range under average conditions 

 350 miles daylight and 800 miles night on ICW, and 150 miles daylight and 200 

 miles night on phone; wave-length range 70 to 180 meters. 



(e) Short-wave receiving set. — Coast Guard type CGR-1 short-wave receiver, 

 wave-length range from 100 to 200 meters and a special Reinartz receiver, wave- 

 length range from 40 to 610 meters. 



(/) Radiocompass. — Tampa was equipped with a Kolster radiocompass and 

 the Modoc with a type SE-1512 Navy standard radiocompass. 



The broadcasting schedule maintained by the patrol was as fol- 

 lows: 



Time Broadcast 



0000 O. C. T Ice broadcast, 3 times, interval of 2 minutes. 



0100 G. C. T I Call NBD (Bar Harbor; to transmit weather for Weather Bureau. 



0200 G. C. T I Q ST for water temperatures. 



0430 G. C. T NA.A. (Arlington) weather, press, and Coast Guard messages. 



0600 G. C. T QST for water temperatures. 



0800 G. C. T ' Special broadcast if necessary. 



1100 G. C. T I Ice broadcast, 3 times, interval of 2 minutes. 



1200G. C.T I Do. 



1300 G. C. T 1 Call NBD (Bar Harbor) to transmit weather for Weather Bureau and ice for Hydro- 



I graphic Office. 



1400 G. C. T I Special broadcast if necessary and QST for water temperatures. 



1500 G. C. T I Weather from Halifax and Cape Race. 



1&30 G. C. T Press and weather from NAA (Arhngton). 



1800 G. C. T QST for water temperatures. 



1900 G. C. T Special ice broadcast when necessary. 



2100 G. C. T QST for water temperatures. 



2300 G. C. T Ice broadcast, 3 times, interval of 2 minutes. 



FIRST CRUISE, MARCH 22-APRIL 8, "TAMPA" 



Splendid results were obtained with the 2-kilowatt tube trans- 

 mitters during this patrol, a considerable portion of which was 

 devoted to cruising near the Tail of the Banks. Very unusual static 

 conditions were found at this time — conditions that were never 

 noticed before the latter part of May or the first part of June in 

 previous years. This may have been partly due to the failure of the 

 patrol vessels to maintain communication with NAA (Arlington). 

 The shift from NAA (Arlington) to NBD (Bar Harbor) and NAD 

 (Boston) was productive of gratifying results. 



Communication with the shore was established on the 50-watt set, 

 which operated exceptionally well until the arrival of the vessel in a 

 static band at the Tail of the Banks. Direct communication was 

 maintained with amateur radio stations in Cleveland, New York, and 

 Manchester. The Reinartz receiver, constructed at Coast Guard 

 headquarters and adapted for the lower wave lengths, was operated 

 successfully. Stations as far west as Hastings, Nebr., were heard 



