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Version 2.0
Operator’s Manual
Glossary
MENU
A list of functions in the display. Selection of a function from the
list is accomplished with either the toggle key or the soft keys.
MERCATOR CHART
A map developed by Mercator projection wherein the curved sur-
face of the Earth’s ellipsoid is projected onto a cylinder and the
cylinder is “unwrapped” to form a flat representation of the ellip-
soid.
MERIDIAN
The circumference line of a meridian plane. The meridians define
longitude. A special case meridian is the Greenwich meridian, whose
longitude is 0 degrees and to which all other meridians are refer-
enced.
MMSI
MOTION DYNAMICS
Characteristics of changes in attitude and location of a moving
object according to its application and/or environment. For ex-
ample, vessels at sea in rough waters may have low forward veloc-
ity but high-rate, short-term changes in attitude due to yaw, pitch
and roll.
NAVIGATION SOLUTION
The mathematical derivation of navigation components (for example,
speed, heading, set, drift) from a series of satellite position updates
plotted over time.
NMEA
National Marine Electronics Association. The NMEA electronics
interface specifications have been developed under the auspices
of the Association. The NMEA 0183 is an internationally recog-
nized specification for interfacing marine electronics. NMEA 0183
version 2.1 is identical to IEC 1162-1.
Summary of Contents for MX420
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