need to know, but which was not an addressee of the
original message. This process is called message
readdressal. The originator or action addressee of a
message may readdress that message to another activity
for action or info. Information addressees may
readdress a message to another activity for information
only. Separate readdressal requests must be made for
each message and/or section being readdressed. Figure
1-15 is an example of a message readdressal. The MTF
editor program will provide all required fields.
Reduction in Transmission of Message Traffic
When an actual or simulated emergency arises or is
anticipated, it may become necessary to reduce the
volume of record and/or voice communications by
imposing MINIMIZE on all military circuits. This
action is designed to reduce message traffic during high
tempo operations. Only traffic directly related to
mission accomplishment or safety of life is considered
essential and therefore appropriate for electronic
transmission. Even high precedence messages that do
not meet this criteria cannot be transmitted during
MINIMIZE. In most cases, MINIMIZE is imposed
only for a particular geographical region or operating
area. Certain METOC-related messages, such as high
wind and high seas warnings, are exempt from
MINIMIZE as per NAVMETOCCOMINST 3140.1.
Weather and oceanographic observations are
considered significant and should be transmitted during
MINIMIZE when any conditions listed in table 1-3
Table 1-3.Weather and Oceanographic Conditions
Exempting Observation From MINIMIZE
WEATHER OR OCEANOGRAPHIC
Wind speeds in excess of 34 knots.
Sea height of 12 feet or greater.
Moderate or heavy precipitation.
Pressure change of 3 hPa or greater within the past 3
Visibility less than 1 mile.
Oceanographic observations as dictated by current
Volcanic activity producing volcanic ash.
Q25. Which subsystem of AUTODIN acts as a security
screen for incoming messages?
Q26. Which computer software is used by the Navy to
format electronic messages?
Q27. What publication outlines procedures for
formatting USMTF messages?
Q28. Where can a listing of METOC-related
Collective Address Designators (CADs) be
Q29. What is the fastest way to obtain correct Plain
Language Address (PLA) information?
Q30. When is the set identifier "NARR/" used in a
Q31. Declassification dates are valid for what
Q32. What are the two essential considerations for
sending electronic message traffic during
PMSV RADIO COMMUNICATIONS
LEARNING OBJECTIVES: Recognize the
purpose of PSMV. Discuss proper PMSV radio
operation procedures and proper voice radio
Pilot-to-Meteorological Service (PMSV) radio
transceivers are found at most military aviation weather
offices ashore. PMSV is used to relay meteorological
information between airfield weather offices and
aircraft pilots. Operating frequencies for each site are
assigned by the Federal Communications Commission
(FCC). PMSV transceivers operate in the VHF and
UHF frequency ranges, with assigned frequencies
generally around 200 to 400 MHz. The frequencies for
PMSV services are listed in the DOD Flight
Information Publications (Enroute), IFR Supplements,
commonly called DOD FLIP IFR Supplements. If an
airfield has a PMSV radio, the frequency is listed for the
airfield as the METRO frequency, under the
The radio transceivers are set to operate only on the
assigned frequency. Normally only the amplifier unit
with an audio speaker and an attached push-to-talk
microphone is located within the weather office. The
actual transmitter, receiver, and antenna assemblies are