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Go Back   SailNet Community > On Board > Gear & Maintenance > How can I identify the waterline from inside?
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Thread: How can I identify the waterline from inside? Reply to Thread
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Topic Review (Newest First)
10-12-2013 12:02 AM
Capt Len
Re: How can I identify the waterline from inside?

Shut the seacock. Disconnect the hose from head. hold hose up . Open valve. lower hose till water flows. Voila!
10-11-2013 11:23 PM
rugosa
Re: How can I identify the waterline from inside?

In the factory we used bright light for quality control. If you are looking in a localized area of the hull (near the head?) a strong flashlight in a ziploc against the hull could work.
10-11-2013 10:47 PM
CalebD
Re: How can I identify the waterline from inside?

I like the strong magnet idea Bob.

If the weather is just right and there are small wavelets hitting the side of your hull you can put your ear to the FRP and hear where the wave sound is loudest.

Faster's thru hull hose idea is easier though.

In extreme desperation you could open a through hull and flood the cabin up to the water line (you'll know when you see it). Then drain it all out and carefully trace the high water line and clean up your boat. ;-!)
10-11-2013 07:30 PM
bobmcgov
Re: How can I identify the waterline from inside?

We plan to mark ours on the inside after painting; when the boat's on the hard, you can use strong magnets to trace around the bootstripe. Need a helper on the inside to trail a pencil & hop over bulkheads.
10-11-2013 06:49 PM
MikeGuyver
Re: How can I identify the waterline from inside?

look down the galley sink & measure up to the drain board .
10-11-2013 06:30 PM
Capt Len
Re: How can I identify the waterline from inside?

Maybe the waterline changes a bit when heeled or the wife is standing on the bow?
10-11-2013 06:28 PM
MarkofSeaLife
Re: How can I identify the waterline from inside?

Quote:
Originally Posted by Barquito View Post
So, I take it that my idea of: drilling a series of holes from the top down until water starts streaming in... is not going to win?
Opps! I screwed up your advice and started from the bilge.
10-11-2013 04:08 PM
Barquito
Re: How can I identify the waterline from inside?

So, I take it that my idea of: drilling a series of holes from the top down until water starts streaming in... is not going to win?
10-11-2013 07:57 AM
Seaduction
Re: How can I identify the waterline from inside?

Quote:
Originally Posted by Faster View Post
A long piece of soft transparent tubing (tygon) temporarily attached to any open through hull with the end carefully held above the waterline would flood to the same height... should work!
Correct. That is a water level.
10-11-2013 12:42 AM
minnow1193 I win!
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