deck
Yes, ship anchors do touch the ocean floor when they are deployed in order to secure the ship in place.
floor of the ship like 1st and 2nd
deck
That is 'the deck'
deck
The deck.
cabins
Your house can have a 'floor one' and a dungeon. If you consider the dungeon to be another floor, then yes. If not, then no.
boat house
The East Room is on the second floor of the White House.
Yes, a sunken ship on the ocean floor experiences a buoyant force pushing up on it that is equal to the weight of the water displaced by the ship. This buoyant force helps to keep the ship in place on the ocean floor despite its weight.
The bridge aka pilot house, wheel house is where the ship is driven or piloted from. There you will usually find the ship's wheel and the other controls needed to navigate the ship.