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Compass Marine How To | all galleries >> Welcome To >> Installing New Found Metals Stainless Portlights > Measuring Interior Offset
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Measuring Interior Offset

Measuring Interior Offset

You also need to measure the interior offset. I did not want the gasket compressing under the square, and throwing my reading off, so I removed the gasket/seal on the Beckson ports to get a more accurate reading.

Note the gasket grove or slot on the port and the staining & grime from leaking. I had totally cleaned each of these slots or groves last spring and installed new gaskets, yet a few of these ports continued to leak. I guess plastic, in the marine environment, has a useful lifespan that had been surpassed..

Nikon D200
1/60s f/4.0 at 70.0mm iso100 full exif

other sizes: small medium large
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