60 50_Afficheur_Multigraphic_um_UK_27
2.11 A.I.S. page
A.I.S. (Automatic Identification System) is a worldwide system for exchanging
information between ships and stations ashore. A.I.S uses dedicated VHF
frequencies to automatically broadcast information such as ship’s identification,
status, position and route. This information is available to any ship or traffic control
station within the signal reception area.
The NMEA input of the Multigraphic can be connected to an A.I.S. receiver to
display A.I.S. targets and to calculate collision risks.
Glossary:
CPA (Closest Point of Approach) is the shortest distance to the meeting point of two
vessels in approach. This is used to measure the collision risk.
TCPA (Time Closest Point of Approach) is the time remaining until CPA (hours,
minutes and seconds)
N° MMSI or selected
target’s name
Number of targets
Selected target highlighted in
red when in alert position.
Selected target’s
Course Over Ground
Selected target’s Speed
Selected target’s
bearing
Selected target’s
distance
Selected target’s
CPA
CPA’s bearing for
selected target
Selected target’s
TCPA
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