Electric boats
I'd suggest that the carbs vs injection % comparison may be off with many many diesel boats compared to relatively few diesel cars.
In any event, battery technology will improve with related improvements in weight ratios. The torque of an electric motor added to new, more efficient propellers will surely make for some great performance improvements.
Cars don't always lead the way. Autopilot integrated to electronic nav systems gives you driverless boats already, with collision avoidance systems too.
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