xxxxxsxx rzxxxxxxxx 
Fish and ■ ildlife '-errS.ee 
Technolo-'i eal laboratory 
2725 Moffltliik® Boulevard 
■'.■©attic, aahington 
February IS, 
^rmXSR&l *to Capt* Harry Oaf fey. 
- ■ . /• ; . ' 
IMS is to advise that the radiophone frequencies listed 
lire been authorized top ms«§ l&fif the second ex- 
pedition of the Alaska Crab Investigation, with the ' following 
limitations; 
2616 kc - approved for conmanicstton between vessels and 
short' stations of the fervid© only. 
■n 
670 kc 
approved for emergency eawamlcatlon 
IT# S* Coast Ouard only. 
with the 
2736 kc 
all government agencies authorised to ns© this 
frequency for eowminioetloo with coastal harbor 
and oasaerelal shin stations only. 
Hi*© vessel "Dorothy* will operate under its r - "ulsr call 
letters - Iff'!®* 
the vessels -Chanpion*’ and "Hocko" having no regular call 
letters have been granted the temporar (0% during the period 
of the charter only, of the followin' station identifications : 
Tessal "Champion” - I'tfTSl. 
Vessel "Lochs" - SSCil* 
The radiophone aboard yot.tr vessel is to be operated in strict 
conformance with the reflations of the Federal Caamnicatioa 
Comission* Advisable precautions arc; 
{1} Do not us© transmitter while passing through Canadian 
waters • 
( 2 ) Keep a complete radio log of all os© of the transmitter* 
(3) Bo sure to sign clear on every call regardless o: ahe«th«r 
contact is made. 
(4) Do not talk longer than five minutes on either 2670 or 
2738. 
E« W. Harrison, 
technologist in Ch.ar.~e* 
H ":Vh 
