GN33 Glossary of terms Appendix A-3
Position update - if, for some reason, there is no position update from GPS or
external sensor, the displayed position will start to flash and an alarm will be
activated to alert the operator. Reset the ‘Position missing’ alarm by [CLR].
The alarm can be set ON/OFF - see section 4.5. The displayed position will
stop flashing once normal position update is resumed.
Restart to approaching point – will automatic recalculate the navigation data
from current position to approaching point.
Rhumbline – is the straight line to a waypoint on a chart.
Route name – each route can be given a name for easy identification.
SDGPS - Satellite Differential Global Positioning System - will provide posi-
tion corrections from received satellite signals.
Speed – Speed Over Ground, measured in knots, kilometers, and miles.
Starboard side – right (green).
TFT – Thin-Film Transistor (Active matrix) display.
UTC – Universal Time Coordinates, which is equal to standard time in
London (GMT). UTC is not affected by the local summertime adjustments.
Velocity – speed towards approaching waypoint.
Waypoint name – a name can be added to each waypoint for easy identifica-
tion.
WPplot – instant storage of actual position as a waypoint.
XTE – Cross-Track-Error (-Distance), measured magnitude of the position
error perpendicular to the intended track line.
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