ICAOAbbreviation for International Civil Aviation
ICEBERGIce found floating in the sea that
originated from glaciers formed from freshwater
accumulations of snow.
IFRAbbreviation for instrument flight rules.
INFRARED (IR)The portion of the electromagnetic
spectrum with wavelengths just slightly longer than
visible light energy (heat energy).
INVERSIONWith respect to temperature, an
increase in temperature with height. Normally,
temperature decreases with height in the
IRCSlntemational radio call sign.
ISOTHERMAL Having an equal temperature
knAlternate abbreviation for knot. In meteorology,
the more frequently used abbreviation is "kt," but
this should not be confused with the uppercase
"KT" meaning kiloton.
LANLocal area network.
LAPSE RATEThe decrease of an atmospheric
variable with height; the variable being temperature
unless otherwise specified.
LCDLiquid crystal display. A gray or black display
of numbers or shapes commonly used in
LDATSLightning Detection and Tracking System.
LEWPA radar feature, the line echo wave pattern,
normally an indicator of severe weather.
LITTORALThe coastal zone including the beach to
the coastal waters.
LLWSLow--level wind shear.
LOWAn "area of low pressure" in the horizontal
plane referring to the isobars on a surface chart, or
an "area of low heights," in the vertical plane
referring to the height contours on a constant
MANOPFormatted weather message header that
identifies the product type, originator, and area
covered by the product.
METU.S. Navy mobile environmental team.
electronic equipment maintenance technician, a
term usually referring to a Navy ET who has
received special training on meteorological
equipment in the METEM school.
METEOROLOGY The study of phenomenon of the
METVANSUSMC mobile meteorological vans.
Highly transportable, completely equipped
meteorological facilities constructed as complete
modules in cargo containers. Modules may be used
independently or connected to form complete, full--
spectrum, meteorological support facilities in a
forward deployed environment.
MILSAn angular measurement scale in which 800
mils equals 45 degrees of arc; a circle is 6,400 mils.
MMFU.S. Marine Corps mobile meteorological
force (weather personnel who operate USMC
MRCAbbreviation for maintenance requirements
card used with the 3-M System.
MRSMini rawinsonde system.
MSLMean sea level, a suffix used after altitude
MVFRMarginal visual flight rules.
NATONorth Atlantic Treaty Organization.
Meteorology and Oceanography Command
headquartered at the Stennis Space Center,
NBCAn acronym for nuclear, biological, or
NDASINavy digital altimeter setting indicator, also
NDBNondirectional beacon; a radio aircraft
navigation aid that allows aircraft to determine the
direction of the transmitter.