Leica MX400 Operating Instructions Manual page 42

Navigate
your course and speed. You will find the Course Over Ground
(COG, which is calculated by GPS), Heading (HDG, which is your
NMEA 0183 compass input), and Heading To Steer (HTS) data on
the left side of the window. HTS data is calculated by considering
your Heading , minus COG and adding BRG to the waypoint. In
doing so, the software considers any Set to be included in the HDG
value. If there is no Set, your HDG should be equal to COG. Set
and Drift is calculated from GPS and your Speed Log (NMEA 0183
VHW record or Pulse input) and Compass (NMEA 0183 HDM,
HDT, or VHW) input or an operator manual input.
On the right side of the lower left window you will find the Speed
Over Ground (SOG, which is calculated by GPS), Speed Log (LOG,
which is your NMEA 0183 or pulse speed input), and your
Waypoint Closure Velocity (WCV). WCV reflects the real time
velocity from your present position and course towards the next
waypoint. The VMG and WCV are calculated from GPS data. Refer
to the diagram below to see a graphical representation between
VMG and WCV.
Version 3.3
Operator's Manual
29