When we got our survey done, Frank the Surveyor gave us a list of Must Dos and a list of Should Dos. On the list of Must Dos was a carbon monoxide detector. Considering the boat is a little like a garage with the engine running right under its floorboards, we agreed with this Must Do.
Mack sussed out a spot for it near the nav station (aka desk for planning your trips) and used a jig saw to modify a space that the depth finder and knot meter (neither of which worked) occupied. We plan to invest in a navigation system some day, so we'll replace the depth finder and knot meter when we get there.
Until then, we won't be dying from carbon monoxide poisoning, and since Mack found this nifty device that also checks for propane, we won't be having a gas explosion. Both good goals.
Two people dumb enough to think anything is possible and smart enough to bumble their way into discoveries.