Não consigo imaginar o que serão "painéis de escotilha", escotilha é uma abertura, painéis poderão ser os "paneiros" ou coberta do chão do barco, mas o termo é muito estranho.

De qualquer forma, deixo uma tentativa de pista ... para enquadrar com o restante texto.

Hatch beams or hatch webs. Hatch beams, also known as hatch webs, are found in older general cargo vessels.


These are heavy beams, fitting into sockets welded or riveted to the inner side of the hatch coamings. The hatch beams serve to support portable hatch covers. Hatch beams also restore to some extent the transverse structural strength of the vessel, which has been affected by the absence of deck beams over the full breadth of the ship.

Hatch boards, aka hatch covers or beams, were thick slabs of wood used to cover holds (openings) in the decks of ships where cargo was stored. Modern hatches are typically mechanically operated large metal covers and no longer need to be moved by hand.

https://www.google.com/search?q="hatch boards" cargo&tbm=isc...

:)

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Note added at 4 hrs (2021-09-10 11:33:07 GMT)
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Please see "bay" in:
https://www.shippingandfreightresource.com/identifying-a-sto...

"Carpeting the Hatch

1. Cut 1" off the hatch panel at one end, so that the hatch is shorter in length and 1/2" off the width. This allows for the layers of carpet to rollover on each of the fixed ends

2. Clean off any underlay residue off the hatch panel and cut a new piece of underlay allowing about 1" overlaps all the way around.

3. Firmly glue (Contact adhesive) the underlay to the hatch panel, then angle cut (45deg) the underlay overlap (scissors turn inwards) all the way around. This reduces the rollover bulk on the hatch edge but still protects the carpet from the top sharp wooden edge.

4. Measure the hatch length and add the overhangs on both ends (say 2" plus the length of the hatch)

5. Source and cut this length of carpet (possibly from under the sofa) and clean any underlay residue from the carpet.

6. Position carpet overlapping the hatch panel. Put several holding staples at say 6" centers on one long edge and stretch the carpet (lever on the edge with a pair of pliers) to the opposite side, and staple accordingly when stretched. Ensure there is enough overhang at both ends to roll down, then staple all the way around every 1", wrapping/notching the corners. (...)"

Note: The same text mentions "starboard side" (estibordo) in a reader's comment:

"Wow! I was in a hurry last spring when i did my carpet and did not want to take the time to make that hatch since I can crawl around the front of the engine pretty easily.

I did do one on the starboard side though since I cannot crawl there because of my hold n treat holding tank combo." https://www.baylinerownersclub.org/forum/current-topics-gc6/...