In my early days I worked in commercial salvage
In all the excitement about utilizing emergency bilge
pumps don’t forget the most effective solution is to find and plug
the hole as quickly as you can.
I have 2 large nylon bags full of different sized wooden cones that can be hammered into any sized hole to reduce the water
flow. Also ready made up pudding blankets and assorted ¾” ply cuts and wedges with hardwood timber to fabricate a quick repair
Once you know you are taking on large amounts of water
Stop the boat
Feel around in the bilge for where you find the most current
and temperature difference, size and plug
If it is a Thru hull
that has let go, then the hole should be fairly round and uniform so the cone plugs work great to reduce the initial flow.
While I have a large main engine
driven crash pump I am not a big fan of running the main engine
when water is pouring into the engine room. I prefer to quietly and quickly work on stemming the flow without danger
to crew or engine.
Once the hole is plugged from the inside, and the bilges are emptied. I would then consider re-plugging from the outside if it would make a more secure fit, before slowly heading to a safe anchorage to do a permanent repair.