NIMANational imagery and mapping agency.
NOAANational Oceanic and Atmospheric
Administration, a division of the U.S. Department
NODDESNaval oceanographic data distribution
expansion system (used with TESS).
NODDSNavy oceanographic data distribution
NOMOGRAMAny graphic product used to find
solutions to complex calculations.
NOTAMNotice to airmen.
NUCAn abbreviation for nuclear, used within some
NWSNational Weather Service, a division of
OAAbbreviation for shipboard aviation operations
division, the shipboard division for which most
Aerographers Mates work.
OAMLOceanographic and atmospheric master
OKTASEighths of the sky.
OODOfficer of the deck.
OPARSOptimum path aircraft routing system.
PHELPhysiological heat exposure limit.
PIBALAn acronym for pilot balloon, a small balloon
tracked with a theodolite to determine wind
direction and speed.
PIREPAbbreviation for pilot report.
PMSVPilot meteorological service, voice radio.
PREVAILINGThe most frequent or most common.
PSYCHROMETER Any device used to measure
dry--bulb temperature (air temperature) and wet--
QFEA signal used to indicate the value provided; the
QFFA signal used to indicate the value provided; the
QNHA signal used to indicate the value provided;
the minimum altimeter setting for the period of time
RABALA method using radar to track a balloon
carrying a radar-reflector, and is used to determine
RADATA term used to indicate freezing level
information derived from a radiosonde
RADFOAn acronym for radiological fallout.
RADIOSONDE A device carried aloft by a balloon
to measure pressure, temperature, and humidity in
RAOBAcronym for radiosonde observation.
RAWINSONDE Radio--wind sounding. A device
carried aloft by a balloon that measures pressure,
temperature, humidity, and the slant-range from
the release point. Calculations on the change in
pressure (height) and change in slant-range
(distance) yield wind speed and direction.
RBCRotating beam ceilometer.
RHUsual abbreviation for relative humidity.
ROCKETSONDEA device carried aloft by a rocket
which measures pressure, temperature, and
humidity as it drifts on a parachute to the ground.
ROCOBAcronym for rocketsonde observation.
SALINITYA measurement of the amount of salts
dissolved in sea water.
SARSearch and rescue.
SLUSHA mixture of snow and liquid water on the
SMOOSShipboard meteorological oceanographic
SSIShowalter stability index.
SURFCAST (or SURFCST) Acronym for surf
SUROBAcronym for surf observation.
SYNOPTICIn general, pertaining to or affording an
overall view. In meteorology, this term has become
specialized in referring to the use of meteorological