call signs, special call signs, and collective call signs - Navy-Marine ...

NTP 8(D)
NAVMARCORMARS. They shall be used on VHF systems and the
WINLINK 2000 system:
NNA0AA through NNZ9ZZ
Seven-character call signs listed above in K120 are converted to
these six-character call signs by taking the first character
after the zero, substituting it for the third "N" prior to the
zero, substituting the members region number in place of the
"zero" in the seven-character call sign, followed by the last
two letters of the seven character call sign.
Example: NNN0ASA VA becomes NNA3SA VA
K130. DEFINITIONS AND TERMS
K131. ADDRESS DESIGNATORS
Call signs, address groups, plain language addresses
(including abbreviated titles), and routing indicators (see
Chapter 8).
K132. CALL SIGNS
Call signs, assigned to individuals, are used on MARS
circuits as personal radio call signs. MARS officials and staff
assistants are assigned administrative call signs for use when
conducting matters pertaining to their administrative or
specialty appointments.
K133. PLAIN LANGUAGE ADDRESS
An abbreviated title and associated geographical location
of a station, MARS official, staff or a predetermined group
within MARS.
Examples:
CHNAVMARCORMARS WILLIAMSBURG VA
(Chief, Navy-Marine Corps MARS, Williamsburg, VA)
ALNAVMARCORMARS PACIFIC AREA
(All Navy-Marine Corps MARS Stations in Pacific Area)
ALNAVMARCORMARSTA REGION ONE
(All Navy-Marine Corps MARS Stations in Region One)
K-3