[CA] [CA11] Axiom Pro RVX Course Up Issues.

[PetrelMarine]

Thanks for your help and that clarification. We will run more tests this week and try using HEAD UP although we had tried that before also and seen similar odd behavior. But we will try again to confirm.

To follow up on my original post, can you please suggest why the COG as reported by the Axiom 16" RVX is different from other onboard independent COG readings. With the vessel underway at 20kts+ on a stable course, an unconnected and independent GPS COG is as much as 20 degrees off from the Axiom COG.

We checked the independent COG against actual vessel heading in no drift conditions and they matched within a degree or two, however the Axiom was again about 20 degrees off. Again, all readings are in degrees Magnetic.
So it seems like the Axiom COG is off from other sources which appear to be correct, and the Axiom incorrect.
Thanks for your help and patience if I am missing something obvious.