is far too vague for us to offer specific useful information. This is why suggestions like "connect it to power," "turn it on," "mount the antenna," "look at the screen," and "RTFM" will be offered to you.Can anybody tell me how to operate a Garmon 540 GPS for my sailboat?
Alternatively, if you'd like to pay my expenses, send me a PM and I will come to your boat and show you the basics... I hope that you have a nice boat, because it could take me a while to figure it out. I guarantee that I will have a full report by September