navigation acronyms, abbreviations and definitions - International ...

MERSAR MERchant ship Search And Rescue (IMO manual)
MERV maximum tolerable vertical position error
MES mobile earth station
For maritime use known as SES. For land use known as LES or LMES.
MESA maximum entropy spectral analysis
MESA Mobility for Emergency & Safety
A single platform for a range of applications related to TETRA bu on
3.8-4.9 GHz.
MESF Mobile Electronics & Security Federation (UK)
MESFET metal semiconductor field effect transistor
Mesosphere Part of atmosphere from ~ 50-85 km
METAR meteorological aerodrome report
METAREA sea area for GMDSS meteorological infomation
MetFAX UK Met Office faxed-based dial-up weather service
Metop Satellites (3) forming EPS
MF medium frequency (300-3,000 kHz) (hectometric waves)
MFA major floating aid (light vessel, LANBY, light float)
MFC multi-frequency channel
MFD multi-function display
MFDS multi-function display system
MGA Multi-GNSS Asia (Japan)
MGF Message Generation Facility (Galileo)
MGM-net The MGA/JAXA multi-GNSS monitor network (Japan)
MGN Marine Guidance Notice (MCA)
MGO marine gas oil
MGUE Modernized/Military GPS User Equipment (US programme)
MH magnetic heading
Actual direction in which the longitudinal axis (of the ship) is pointed,
defined by the angle between the magnetic meridian through its
position and the fore-and-aft line (of the ship), expressed in angular
units from magnetic north (000º).
MHRS magnetic heading reference system
MHW mean high water
MHWN mean high water neaps
MHWS mean high water springs
MHz megahertz (1,000,000 cycles per second)
MI misleading information
MI shallow (met)
MIC mounain instructor certificate
MICA multiyear interactive computer almanac
Micro-PNT Micro-Technology for Positioning, Navigation and Timing (DARPA)
microcell As a femtocell, but range increased to ~2 km
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March 2012