That happened to my friend who owns a powerboat. The speedometer through hull installation poped in when he accelerated too hard... I don't want sound like the cool guy or the hero but, keeping it calm is really important. There was half a million thoughts going through my headat that moment. How cold is the water, we can see the shore, how far is it, how long it would take? etc... etc...
The smart guy has taken the
vhf out and cleaned and left it in the house, so no
vhf...
I
keep USCG phone numbers recorded in my phone memory for at least the LIS harbors I travel most It saves time to dial 911 and get redirected... Have a fix for your location every 10-15 minutes with a simple
gps tracker.(get a
handheld gps unit, they are getting cheaper, and you don't need a fancy one.)
The USCG numbers and knowing approximetly where we were saved my skin that day, at least from swimming...
The plug for that through hull was in the engine compartment which was almost impossible to reach for us (CG used a goggle to reach it)... USCG boat came and took us aboard then saved the boat by pumping out the water and towing the boat at the same time...
And consider this; the bilge
pumps in the market do not really
pump what they really claim. I don't have a bilge (believe it or not) on my 22 footer. But I recommended my friend to install a 2000gph regular
pump and 3500gph back up
pump. If you can keep the diesel or genny running so you don't drain batteries within minutes. Bilge
pump will not save the boat but will give you some extra time to catch up with the situation...
And always remember, the boat has the insurance, not your life!
(Unless your wife got one for you that you don't know about

)
Take care...