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ProMARK X
SOA
SOG
SPEED OF ADVANCE
Start
SPEED OVER GROUND
SQ
3D
TIME TO GO
TOGGLE
TTG
Speed of advance.
Speed over ground.
A vector component of ground
speed (SOG) towards the destina-
Destination
tion. Abbreviated as SOA. Dis-
played when NAV is pressed and
after three position fixes have been
taken.
SOG
Actual ground speed measured as
instantaneous speed and direction.
Abbreviated as SOG. The calcula-
tion is made by the unit instantly
and displayed with VEL.
See Signal Quality.
Three dimensional. The mode of
operation that calculates latitude,
longitude, and altitude, requiring
the use of four satellites.
Time to go. The time necessary to
reach the destination of the current
leg, based on Speed
of advance (SOA).
To switch back and forth between
two settings, or to move through
settings in a continuous loop. For
example, when setting latitude, use
the RIGHT ARROW to toggle
between North and South.
Time to go.
Appendix
A-55
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