Larry,do you need a gyro to use ARPA?A great tool if available for recreational boating...thought i would bump up your post,your course is in 2 days..only $25!
—
"Sailing Still" 1990 C36 M25 wing
Sail Canada/Transport Canada training
Gibsons Harbour BC
www.landsendbc.ca
Greg, I think you have Mini-ARPA...also called MARPA...instead of ARPA. MARPA has a lot of drawbacks, but will be most helpful if you have a solid and *accurate* heading sensor. My MARPA uses simply COG, so a heading sensor is not needed for bare minimum usage; nevertheless, it is terribly inaccurate as a result.
The take-away: Never completely trust MARPA as your collision avoidance tool of choice.
Larry Brandt
S/V High Flight #2109
Pacific Northwest, PDX-based
2002 C-36 mkII SR/FK M35B
On mt Garmin 4208 with 18 HD radar you need a gyro to make it MARPA work
Bill Miller
S/V Lorraine
Pacific Northwest,Sound Sound
Grapeview,Wa
1990 Mk1
A gyro, Bill? Or a fluxgate compass?
Larry Brandt
S/V High Flight #2109
Pacific Northwest, PDX-based
2002 C-36 mkII SR/FK M35B
You are right, wrong word a fluxgate compass is what it needs . I have a fluxgate for my autohelm but can not tie it to my garmin, and garmin wants 900$ so will do with out
Bill Miller
S/V Lorraine
Pacific Northwest,Sound Sound
Grapeview,Wa
1990 Mk1