I picked up a used Ray Marine
RC 435 chart plotter on craigslist. It included the antenna
and my local chip. When I turn it on the screen
is good but it does not get a fix. I leftit on overnight and it picks up multiple satellites but has a spare notation and no signal strength from them. I looked on the Ray Marine
website and you can test the antenna
but my ohmmeter does not go high enough. Needs to go to 8 MOhms. Anybody have any suggestions?