T&T: AIS Iconography

[Peter Bennett]

Sunday, July 6, 2008, 9:07:24 PM, Garrett wrote:

GL> Normally, AIS targets display as yellow arrowheads. What does one in black
GL> outline with an x over it mean?

Depends on your chart display program - my Raymarine plotter normally
displays AIS targets as grey triangles, but I think turns them red as
if the vessel is predicted to come within my alarm circle.

Tiki Navigator displays them as blue circles with a line indicating
direction of motion, and turns them red if it considers them a hazard.

As a wild guess, I'd suspect that the black outline with an X
indicates that no signal has been received from that vessel for some
time - Raymarine puts a black line across the triangle for that case.


-- 
Peter Bennett, VE7CEI    Vancouver, B.C., Canada
Ennos 31 "Honeycomb"
GPS and NMEA info: http://vancouver-webpages.com/peter 
Vancouver Power Squadron: http://vancouver.powersquadron.ca