AIS and ARPA Target Symbols

Web VTS displays two types of targets  –  AIS (triangle) and ARPA (circle).

Inmarsat, Iridium and Globalstar targets are displayed the same as AIS (triangle).

– AIS Base Station.

– AIS target equipped with Class A AIS Transponder that has sent an AIS position report within 10 minutes.

– AIS target equipped with Class B AIS Transponder that has sent an AIS position report within 10 minutes.

 – Moving (speed greater than 0.5 knots) AIS target equipped with Class A AIS Transponder that has sent an AIS position report within 11-30 minutes. Color: blue violet.

 – Moving (speed greater than 0.5 knots) AIS target equipped with Class A AIS Transponder that has sent an AIS position report within 31-60 minutes. Color: violet.

 – Moving (speed greater than 0.5 knots) AIS target equipped with Class A AIS Transponder that has sent an AIS position report within 1-2 hours. Color: grey.

 – Stationary (speed less than 0.5 knots) AIS target equipped with Class A AIS Transponder that has sent an AIS position report within 11 minutes-6 hours. Color: black.

 – Satellite/LRIT target that has sent a position report within 60 minutes. Color: maroon.

 – Satellite/LRIT target that has sent a position report within 1-6 hours. Color: sienna.

 – Satellite/LRIT target that has sent a position report within 6-12 hours. Color: light coral.

 – Satellite/LRIT target that has sent a position report within 12-24 hours. Color: grey.

– Selected AIS target.

 – SAR Aircraft.

– ARPA target.

– Aid to Navigation (Buoy/Light house).

 – Virtual Aid to Navigation.

– Weather buoy.

–  Weather station.