Old Hull Penetrations

[ThreeQrtrTime]

While cleaning out the interior of our 42 yr old (new to us) boat I found what I believe are a couple of old depth sounder or speed log transducer type items. There is an old but still functioning depth sounder with a third penetration. Of the three penetrations, not sure yet which is the functioning unit. Is it normal to leave these old units in place. Should they be removed and the holes filled? Do I rename the boat (Swiss Cheese)?

[Cheechako]

Originally Posted by ThreeQrtrTime

While cleaning out the interior of our 42 yr old (new to us) boat I found what I believe are a couple of old depth sounder or speed log transducer type items. There is an old but still functioning depth sounder with a third penetration. Of the three penetrations, not sure yet which is the functioning unit. Is it normal to leave these old units in place. Should they be removed and the holes filled? Do I rename the boat (Swiss Cheese)?

If the transducers are sounds it's probably OK. If they are plastic, I would take them out and glass closed from both sides with your next haulout.(taper the glass around the hole well)

[SabreKai]

I'd pull them out and patch the holes on principal. Less drag. Sound bottom. No leaks over time. As was mentioned, do the patch from both sides, bevel the hole at least 10:1 and fill with alternate woven and chopped strand mat.

[Capt Phil]

I'm with Sabrekai on his suggestion. The fewer potentials for leaks, the better you sleep at night. Cheers, Phil