comdtinst m2400.1f - US Coast Guard Response Boat-Medium

COMDTINST M2400.1F
CHAPTER 1. GENERAL INFORMATION
A. Purpose. COMDTINST M2400.1 (series) is the basic U.S. Coast
Guard Radio Frequency Plan and contains radio frequencies for U.S.
Coast Guard use. It is issued for the use and guidance of
responsible commanders in formulating supplementary plans and is
furnished to lower echelons for information and planning purposes.
COMDTINST M2400.1 (series) is a radio frequency plan and does not
constitute a radio frequency authorization to operate unless
specifically indicated. Authorization for federal government
stations to use radio frequencies is granted by the National
Telecommunications and Information Administration (NTIA) and specific
assignments are listed in the Government Master File (GMF).
B. General.
1. Information. This publication provides explanatory
information concerning application procedures for use of radio
frequencies, a frequency index and lists of circuits.
a. Frequency Index. The frequency index is a listing of
all radio frequencies assigned by the Commandant for Coast
Guard, and indicates the circuit designator for each of
these assigned radio frequencies.
b. Annexes. The list of circuits is divided into annexes
denoting its function, and each circuit in a particular
annex is arranged in circuit designator order. The
circuit details normally include a descriptive title, a
list of assigned radio frequencies and any special
instructions governing the use of these frequencies.
c. Circuit Designator. The circuit designators within
the "B", "P", "Q", and "Z" annexes are arranged by Coast
Guard District whenever the circuit is confined to an
individual district (e.g., a "P05.01" circuit would
indicate a fixed circuit in the Fifth Coast Guard
District). Whenever the circuit is not restricted to a
particular district, it is assigned a circuit
designator "18" or higher. (e.g., "P18", "Q20", etc.).
d. Circuits. The circuits within the remaining annexes
are arranged by type in circuit designator order; e.g.
"A01" is the Primary Ship-Shore Circuit, and "A01.01" and
"A01.02" are sub-divisions of the Primary Ship-Shore
Circuit indicating HF Ship-Shore Circuits for the
Atlantic and Pacific Areas respectively.
2. Designating Symbol. The designating symbol will normally be
used to identify circuits and radio frequencies in messages,
letters, instructions or other documents; e.g. "A13.02" is the
circuit designator for the High Seas Radiotelephone Service,
"4370.4 kHz" is one of the several radio frequencies assigned
to this circuit.
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