If its any help, I have the ray 425 (same one as 435, but its B&W). refresh rate is too quick to notice. super accurate positioning.
easy to use, waypoints, routes and navigation to waypoints and along routes is super smooth and accurate....
had it to two seasons now. Navionics chips are excellent, and they offer an yearly udate for like 25 bucks.
Don't know what else I can say, my buddy saw mine and bought the same one last year.
If you have specific questions , maybe I can answer.
Good luck.
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