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2. Alcatraz Wharf - Wikipedia

   en.wikipedia.org/wiki/Alcatraz_Wharf

   The wharf, or boat dock, was established on Alcatraz in the 1850s to permit the landing of men and building materials to construct a fort completed in 1859. In 1867, the General McPherson was built to serve the island and other military institutions in the San Francisco Bay Area, as Alcatraz became a long-term military prison from 1868. The ...

3. Amphibious transport dock - Wikipedia

   en.wikipedia.org/wiki/Amphibious_transport_dock

   An amphibious transport dock, also called a landing platform dock (LPD), [ 1 ] is an amphibious warfare ship, a warship that embarks, transports, and lands elements of a landing force for expeditionary warfare missions. [ 2 ] Several navies currently operate this kind of ship. The ships are generally designed to transport troops into a war zone ...

4. Caisson (lock gate) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(lock_gate)

   A caisson is a form of lock gate. It consists of a large floating iron or steel box. This can be flooded to seat the caisson in the opening of the dock to close it, or pumped dry to float it and allow it to be towed clear of the dock. Graving docks at Birkenhead, closed by a variety of ship caissons and floating (sliding) caissons.

5. Deck (ship) - Wikipedia

   en.wikipedia.org/wiki/Deck_(ship)

   As is typical for a late-19th-century vessel, several deckhouses may be seen. A deck is a permanent covering over a compartment or a hull [1] of a ship. On a boat or ship, the primary or upper deck is the horizontal structure that forms the "roof" of the hull, strengthening it and serving as the primary working surface.

6. Sally port - Wikipedia

   en.wikipedia.org/wiki/Sally_port

   Sally port. A sallyport is a secure, controlled entry way to an enclosure, e.g., a fortification or prison. The entrance is usually protected by some means, such as a fixed wall on the outside, parallel to the door, which must be circumvented to enter and prevents direct enemy fire from a distance. It may include two sets of doors that can be ...

7. Dock - Wikipedia

   en.wikipedia.org/wiki/Dock

   The word dock (from Dutch dok) in American English refers to one or a group of human-made structures that are involved in the handling of boats or ships (usually on or near a shore). In British English, the term is not used the same way as in American English, it is used to mean the area of water that is next to or around a wharf or quay.