Raymarine Raydata Installation And Operating Handbook page 85

76
SOG
TD
TTG
VMG
WPT
XTE
RAYDATA Installation and Operation Handbook
Speed Over Ground.
Time Difference. The difference in time of arrival
(measured in microseconds) of the two Loran signals, one
from the master transmitting station and the other from the
secondary.
Time To Go.
Velocity Made Good. The component towards your
destination based on your vessel's current speed.
Waypoint.
Cross Track Error.