12/03/05 22:10:15.63
CONFIDENTIAL June 1, 1942
OPERATION PLAN FOR MIDWAY AREA
3. Frequencies are the same as paragraph 4 of DOCTRINE, i.e.
Army & Navy planes:
Primary 4265
Secondary 4325; marine planes voice 3765 until action begins,
then shift to 6010 with 7700 as secondary.
Authentication:
Patrol planes use authenticator in force.
Other aircraft use PARIER IN THE DELL.
(Two alternate letters) i.e. RE or EL or NH
If you call any aircraft other than patrol
planes, use PARIER IN THE DELL for authentication.