Boat Design

Lifting keels and the loss of "Bayesian"

Imagine, for a moment, that you are aboard a 56 metre luxury yacht anchored off Sicily. It is before dawn, there's some wind but the crew aren't worried, and you're coming up to take a look around. Suddenly, the yacht is knocked about as all the windows explode around you. Confused, startled, and scared, you run for a muster station, managing to get aboard a life raft moments before the yacht disappears beneath the waves. The whole event took longer to write up than it took to happen.

Lithium Charlatanism

It's great to see electrification taking off, as was definitely evident at a recent boat show. It's a little less great to see how much charlatanism and huckstership have tainted the nascent field of marine lithium batteries and the equipment that uses them.
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This 1100 W electric outboard is equivalent to a 3 hp gas engine!
1100 W is 1.475 hp, by the literal definition of horsepower which is 1 hp = 745.7 W. Stop lying.
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Why I over-design electrical systems

"Why", I'm sometimes asked, "do you specify electrical stuff that's bigger and more powerful than I had expected?"

It's a justifiable question. Batteries are expensive, heavy and bulky; why would you want any more of them than necessary? And what's with the multiple shutoff switches, subpanels, and other non-typical features of my electrical designs?

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