It is called the hatchway.
If it is a round opening, it is called a scuttle. If it is a square opening it is called a hatch. Depending on the vessel and the location they can be "dogged" open.
Jonah was sleeping in the lower deck of the boat during the storm.
The Upper Deck of a boat or ship is either the highest of two decks of a boat or the part of the deck that's the highest part covering the hull. The deck of the boat is the part covering the hull or body.
upper deck
The main part of the boat that you walk on is called The deck. Usually known to have the best view on the boat.
dont know boats
When you go on a river cruise, sit on the top deck of the boat if possible. This will give you the best view of the river, and it will not seem like the boat is moving in the water as much as it would be if you were sitting on the lower deck.
Height from the waterline to the deck is "freeboard." Above the deck is superstructure, and below the waterline is draft.
tabernacle
It's a sailing term. "Heel" means the lower end or side of a thing on a boat. (The heel of the mast is the part that sits on the deck.) The heel of the boat itself is the bottom of the boat, and when the boat leans over in the wind you can see the bottom, so it's called "heeling over".
11. There was the roof, on top of the boat deck structure. The Boat deck A-Deck B-Deck C-Deck D-Deck E-Deck F-Deck G-Deck Orlop Deck Tanktop Deck
a deck of a boat is the place were people walk at and sometimes dance and have fun that is what a deck is and like bridge
A scuttle or hatch. Sometimes covered by a "Doghouse" if the hatch or scuttle is on a weather deck and left open for long periods of time inport.