Not sure if you've seen it or not, but there is a guy on YouTube who is doing basically what you are. Might get some ideas from him. He has a full playlist for it.
https://youtube.com/playlist?list=PLTlAhsWfj8B-CcRmy-Xf9hchzY-YpXP5H
Good point, my concern is being asleep in the cabin, alarm at the helm might not be loud enough to wake me up. It is simple to wire, so I think I'll go with two alarms, with sensor in both the forward bilge and aft bilge.
LOL that is the exact one I'm looking at, found it on Amazon. I think I would like to alarm panels, one at the helm and one in the cabin. Thanks guys for all the help!
One of the surveyor's comments was I need to add a bilge high water alarm to my 282. So, anyone have suggestion on a easy to install high water alarm, and where to mount it (how high is high)?
If I'm doing over 40 I'm probably not looking for fish. :) Yeah this is to get me started, once I get the second NSX I'll look at through hull transducers.
A little update, as I was contemplating Simrad vs Garmin, I recalled that I had a new in box transducer that came with my last Lowrance. I didn't use it as I already had a transducer on the boat. The transducer is the TotalScan all in one transom mount model. It works with Lowrance and Simrad...
Yeah that is something I will be doing, right now I'm just trying to find out the best way to get one graph and transducer on the boat. Then as money allows I will add the other components that I want.