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Operator's Manual
Glossary
798
Assigned Mode
A transponder operates in an assigned mode if it is instructed by
an external system to follow certain dictated rules, such as, which
slots to use for transmission.
Autonomous Mode
A transponder.operates autonomously ifit is independent of
external control.
Aux
Auxiliary Port - A communication port on the AIS transponder,
which can be used for NMEA or RTCM, input.
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.
BAUD
Transmission rate unit of measurement for binary coded data (bit
per second).
BEARING
The direction of one terrestrial point from another, expressed as
angular distance from North, clockwise through 360°.
BIT
Short form ofBinary Digit. The smallest element ofdata in a binary-
coded value.
bps
Bits Per Second.
CENTRAL MERIDIAN
The meridian (see MERIDIAN) that passes through the center of
the referenced grid (Zero longitude).
CHARACTER STRING
Contiguous characters (other than spaces) in a message.
CHECKSUM
The value sent with a binary-coded message to be checked at the
receiving end to verify the integrity of the message.
Version 1.5
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