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2. Fender (boating) - Wikipedia

   en.wikipedia.org/wiki/Fender_(boating)

   In boating, a fender is an air-filled ball or a device in other shape and material used to absorb the kinetic energy of a boat or vessel berthing against a jetty, quay wall or other vessel. [1] Fenders, used on all types of vessels, from cargo ships to cruise ships, ferries and personal yachts, prevent

3. Phoenician joint - Wikipedia

   en.wikipedia.org/wiki/Phoenician_joint

   A Phoenician joint (Latin: coagmenta punicana) is a locked mortise and tenon wood joinery technique used in shipbuilding to fasten watercraft hulls.The locked (or pegged) mortise and tenon technique consists of cutting a mortise, or socket, into the edges of two planks and fastening them together with a rectangular wooden knob.

4. Treenail - Wikipedia

   en.wikipedia.org/wiki/Treenail

   The bottom chord often requires 2–3 pegs and is the weakest part of the truss. Hence the treenail can not prevent failure in spans of over 30 feet (9 m). In cases where significant shrinkage may occur, it may be necessary to use iron U-straps or reinforcements. [10]

5. Bridge protection systems - Wikipedia

   en.wikipedia.org/wiki/Bridge_protection_systems

   Pile-supported fender system on the James P. Houlihan Memorial Bridge. Fender systems attached to the pier with the goal to absorb the vessel impact. Their ability to withstand a typical ship collision is low. Fenders are built using a variety of materials: [8] thin-walled concrete box; thin-walled steel membrane steel; rubber.

6. Lock (water navigation) - Wikipedia

   en.wikipedia.org/wiki/Lock_(water_navigation)

   The boat enters the lock. 8–9. The boat enters the lock. 3. The lower gates are closed. 10. The upper gates are closed. 4–5. The lock is filled with water from upstream. 11–12. The lock is emptied by draining its water downstream. 6. The upper gates are opened. 13. The lower gates are opened. 7. The boat exits the lock. 14. The boat exits ...

7. Rowlock - Wikipedia

   en.wikipedia.org/wiki/Rowlock

   A rowlock cut into the top strake of a boat. In some, largely older, strict terminologies, a rowlock is a U-shaped cut-out in the top strake of a boat (usually the wash-strake). In older texts, the U-shaped metal fitting may be called an "oar crutch", a usage which is largely obsolete. [4]: 213–217 [5]