Leica apMK12, Operation & Installation Manual

Page: 196 / 218

Version 1.5 183
Appendix G - Technical Specifications Installation Manual
Glossary
A LARM
Message by which the navigator signals the occurrence of an event.
The alarm is indicated by an audible tone and/or a message (or
icon) on the display.
ALMANAC
Library of coarse satellite orbital characteristics used to calculate
satellite rise times, set times, angles of elevation, etc. Almanac
data is valid for 181 days.
ALTITUDE
The height of the antenna over mean sea level.
AMBIENT
Surrounding or encompassing environment.
ANTENNA HEIGHT
The height (over the waterline) in which the antenna is installed.
This value is used in 2D mode only.
ATMOSPHERIC PRESSURE
See BAROMETRIC PRESSURE.
APPARENT WIND ANGLE (AWA)
The angle of the wind as measured on the moving vessel relative to
the heading of the vessel. An AWA of 0° indicates a wind from
straight ahead, whereas 180° indicates a wind from straight astern.
An AWA of 90°St indicates a wind perpendicular to the vessel from
its starboard side.
APPARENT WIND SPEED (AWS)
The speed of the wind as measured on the moving vessel.
AZIMUTH
In satellite navigation, the angular distance measured on the hori-
zon circle in a clockwise direction from the north point in the hori-
zon to the satellite point in the horizon.
B AUD
8/13/01, 11:08 AM 183