Someone observed that the Bounty was not well served by an engine-driven bilge pump.
I don't think this is correct.
My understanding is that the only high capacity pump on Bounty was a mains electric (ie AC) pump, which relied on a genset. The gensets in turn would almost certainly have relied on the DC electrical
supply. This would have quickly become unavailable due to flooding, a classic Catch-22.
It seems to me axiomatic that a traditional planked ship or sailboat should have two essential elements:
A large diesel motor
which can be started (by hydraulic or spring starter) and run, BOTH without any electrical supply, and with a completely flooded engine room.*
It makes sense for this engine to be the main propulsion
engine, partly because it needs to be similarly independent of other services in emergencies, and partly because it will be better maintained than any other engine.
This engine should be coupled to at least one direct driven pump which can pump sizable debris without turning a hair, and this pump or pumps should be sized to monopolize the output of that engine, if the output falls in the category of 'auxiliary' power. (It seems that the Bounty pump was woefully undersized, as well as insufficient in number, and inadequate in terms of availability)
Naturally there can and should be other pumps, but they should be viewed as a convenience and a supplement: their availability should in no way be relied on.
*This engine should have a second, emergency fuel
supply sufficient for six hours running, gravity fed, preferably a sealed tank with an internal bladder in lieu of a breather (but beware of fuel heating
issues from injector bypass) and easily refillable by hand pump.
If it's not the main propulsion
engine, it should be capable of jump-starting the main engine, perhaps by a dog-clutch on the donkey engine, a one-way clutch
on the main engine, and a suitable belt drive. Preferably the main engine will have decompressors, in this scenario.
It seems to me that it's lessons like this which should be learned from what happened to the Bounty, but these days it seems fashionable to look elsewhere than the basic, unglamorous, "chips down" grease monkey technologies, even when there is more than enough blame to go around.