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NMEA National Marine Electronics Association. A
professional organization that defines and
maintains the standard serial format used
by marine electronic navigation equipment
and computer interfaces.
OSGB A coordinate system describing only Great
Britain, similar to UTMs. Used with GRB36
datum.
Position fix Position coordinates as computed by the
MYSTIC.
SOG Speed Over Ground. The speed at which
the MYSTIC is moving.
TMP Temperature.
True North The direction to North Pole from an
observer’s position. The north direction on
any geographical meridian.
UTC Universal Time Coordinated. Formerly
referred to as Greenwich Mean Time
(GMT).
UTM Universal Transverse Mercator metric grid
system used on most large and
intermediate scale land topographic charts
and maps.
VMG Velocity Made Good. The component of the
velocity that is in the direction of the
destination.
WPT Waypoint. A location saved in the receiver’s
memory which is obtained by entering data,
editing data, calculating data or saving a
current position. Used to create routes.
XTE Cross Track Error. The perpendicular
distance between the present position and
the courseline. Given as a distance, right or
left, of course when facing the destination.
Mystic OM.book Page 116 Wednesday, October 22, 2003 8:59 PM