M.B. Marsh Design

Good drawings take time to make. Time costs money. Therefore, good drawings are not cheap.

Some boat builders seem to think that this logic leads to a fourth point: "Therefore, we will not include drawings."

Er, guys? Not cool. Seriously, not cool. Just see what happens the very first time the owner has to have something fixed, and the technician spends most of a day rooting around in the bilges trying to figure out where the hell all the wires are going.

Complex systems can bring all the comforts of home to your yacht- if, that is, you can afford to install and maintain them. For those of us with budgets to watch, simpler electrical and mechanical systems can- if properly designed- be a major cost and time saver aboard ship.

Electric cars are trendy these days. Hybrid electric systems are perhaps a little less exciting, but still get a large share of marketing attention. Boatbuilders have been getting in on the act too, but does it make sense to consider electric drive for a boat?

In today's article, I'll summarize three common powertrain architectures (battery electric, hybrid IC/electric and conventional IC engine) and outline the logic that might lead you to choose an electric drive system for your boat.

TL;DR: Electric propulsion can make sense in a boat with high house loads, short range and minimal propulsion requirements, but is unlikely to pay off in faster, longer range vessels or in boats with low house loads.

My five-metre runabout Sunset Chaser has been undergoing an assortment of repairs this winter. Here's a brief overview of the wiring and hardware updates I've been doing on this boat, in the hopes of keeping her going for another decade or so.