Join Date: Apr 2006
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Re: Electrical kill switch
"on a boat or a plane, redundancy is a good thing."
Perhaps you've never heard of the KISS principle.
Long distance aircraft used to have four engines, for redundancy. The accepted logic was that you might lose one engine, but three were still more than you needed. Except...
The thinking changed. Four engines means four major failure nodes and now you are 16x more likely to have a failure because they compound, they don't just add up. So now all the airliners use just TWO engines. One, and the minimum number of spares, to provide some extended glide time if one fails.
Same thing on a small boat. The more stuff you've got, the more stuff that finds a way to fail. Infest it with switches, and they will all corrode and wear. Even if you buy the really expensive waterproof and vaportight kind, and then there goes the budget.
Need to cut a power line in a hurry? No problem, one damage control axe can do all sorts of good work fast. (VBG)
You may notice, you don't see THOSE around very much anymore either, do you?
No, you let the battery primary fuse work, the power goes out before you could hit a switch, and then you just attend to the problem. KISS.