?ieh and : ildlife 3 
Technological 
2725 "ontla'cs 
Seattle* i 
February 12, 1941* 
: to capt . Anders Rilsea# 
This is to advise that the radiophone frequencies listed 
hereunder have been authorized for use, during; the second, ex- 
pedition of the Alaska Crab Investigation, with the following 
limitations t 
2616 kc - approved for eon tuni cation between vessels and 
©hors stations of the ervic© 
2670 ke - approved for etergeney eomueieatlon with the 
U* 3 * Coast Guard only* 
2733 kc 
all government agencies authorized to use this 
frequency for eansuni cation with coastal harbor 
and ccmercial ship stations only. 
The vessel *• Dorothy" will operate under Its regular call 
letters - : KDD* 
The vessels "Champion" and "Locks" having no regular call 
letters have been granted 
of the charter >nly, of the following 
Vessel "Ghanaian" « ®IS!* 
Vessel "locks" - 
oonforrmne® with 
Gomtssioii. 
aboard year vessel is 
r filiations of the 
precautions ar©s 
to be operated in strict 
*ral Ccsnun teat Ion 
(1) Do not use transmitter while passing through Canadian 
waters • 
(2) Keep a complete radio log of all use of the transmitter* 
(3) Be sure to sign clear on every cell regardless of whether 
contact is 
(4) Do 
2730. 
er than five minutes on either 2670 or 
I i ! vh 
.... Harrison, 
Technologist in Charge. 
