L3 Technologies AISA1 Manuale Utente
Marine Systems
Aviation Recorders
Initial Issue
Dec. 01/06
Dec. 01/06
165M0014-10
Page 1–22
1.5.1.8
ROT - Rate of Turn
The rate of turn value is only used if the talker identifier is “TI”. Otherwise the value
will only be used to determine if the vessel is “Moving Right” or “Moving Left”.
will only be used to determine if the vessel is “Moving Right” or “Moving Left”.
Field
Notes
Rate of Turn
Used when status is “A”. If Talker
is “TI”, value is converted ascending
to 1371 msg 1, 2, 3 spec. If talker is not
“TI”, value is set to - 127, 0, or + 127,
based on ROT value.
is “TI”, value is converted ascending
to 1371 msg 1, 2, 3 spec. If talker is not
“TI”, value is set to - 127, 0, or + 127,
based on ROT value.
Status
Must be “A”
1.5.1.9
VBW - Dual Ground / Water Speed
The current position source must be external GPS, and heading must be available
for the transponder to accept this sentence.
for the transponder to accept this sentence.
Field
Notes
Longitudinal Water Speed
Ignored
Transverse Water Speed
Ignored
Status: Water Speed
Ignored
Longitudinal Ground Speed
Used if Status is set to “A”
Transverse Ground Speed
Used if Status is set to “A“
Status: Ground Speed
Used
Stern Transverse Water Speed
Ignored
Status Stern Water Speed
Ignored
Stern Transverse Ground Speed
Ignored
Status Stern Ground Speed
Ignored
1.5.1.10 VTG - Course Over Ground and Ground Speed
Field
Notes
GOG, degrees True (2 fields)
Used
COG, degrees Magnetic (2 fields)
Ignored
SOG, knots (2 fields)
Used
SOG, km/h (2 fields)
Ignored
Mode Indicator
Used