December 14, 2021
When we were last out, I saw something strange on our Simrad NSS9 EVO3 chartplotter – a curved projection line…
The projection line is set to show the vessel’s projected position in 30 minutes at it’s present course and speed. I’ve never seen a curved line before. Feature? Bug? Any ideas anyone?
Rich
Update:
steved replied on cruisersforum.com with the following:
Rate Of Turn (ROT), usually expressed as degrees per minute. (in this case a minute being a minute of time, not a minute of angle !)
AIS Class A vessels (aka big ships), include a ROT value in their AIS transmissions. In this example, the ship is obviously turning and thus the projected course appears as a curve.
