MSIModified surf index. A single dimensionless
number that is used to provide a relative measure of
conditions likely to be encountered in a surf zone
during amphibious operations.
MTFEditor-Message text format. The AUTODIN
message formatting software endorsed by the
Navy.
MUFMaximum usable frequency.
N
NATONorth Atlantic Treaty Organization.
NAVAIDAn acronym for navigation aid, usually
referring to an aircraft navigation aid.,
NAVMETOCCOM Short
title
for
Naval
Meteorology and Oceanography Command
headquartered at the Stennis Space Center,
Mississippi.
NAVOCEANOShort
title
for
the
Naval
Oceanographic Office, Stennis Space Center, MS.
Also NAVO.
NEXRADNext generation radar. The weather
surveillance radar-1988-Doppler (WSR-88D).
NIMANational Imagery and Mapping Agency,
headquartered in Washington, D.C.
NIPRNETNonsecure Internet protocol routing
network used by the military.
NITESNavy integrated tactical environmental
system.
NOAANational
Oceanic
and
Atmospheric
Administration, a division of the U.S. Department
o f C o m m e r c e .
NOTAMNotice to airmen.
O
OAAbbreviation for shipboard aviation operations
division, the shipboard division for which most
Aerographers Mates work.
OAMLOceanographic and atmospheric master
library.
OMNI-DIRECTIONAL An antenna capable of
sending or receiving radio waves in all directions.
OTCIXSOfficer in tactical command information
exchange system.
P
PASSIVE USWA method for detecting submarines
that evaluates a signal received by a hydrophone.
PLAPlain language address used with AUTODIN
messages.
PMSVPilot-to-meteorological service.
PSNProcessing sequence number used with
AUTODIN messages.
R
RADFOAn acronym for radiological fallout.
RATTRadio teletype.
REFRACTIVITY The study of how elec-
tromagnetic energy is bent (refracted) as it moves
through different density layers within the
atmosphere.
S
SARSearch and rescue.
SECRETClassified information that if disclosed
could cause serious damage to national security.
SERVERA fast computer connected to the Internet
full time. It directs Internet traffic to its proper
destination.
SHFSuper-high frequency radio waves. Generally
between 3 GHz and 30 GHz.
SIPRNETSecure Internet protocol routing network
used by the military.
SMOOSShipboard meteorological and ocea-
nographic observation system.
SPECIAL-HANDLING MARKINGDesignation
applied to messages requiring special handling
procedures. Special handling markings ensure
messages so marked will be handled and viewed by
authorized personnel only.
SSICStandard subject identification code.
STU-IIISecure telephone unit-third generation.
SYNOPTICIn general, pertaining to or affording an
overall view. In meteorology, this term has become
specialized in referring to the use of meteorological
data obtained simultaneously over a wide area for
presenting a comprehensive picture of the state of
the atmosphere.
AI-3