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2. Pontoon boat - Wikipedia

   en.wikipedia.org/wiki/Pontoon_boat

   A pleasure boat with two lengthwise pontoons. A pontoon boat is a flattish boat that relies on floats to remain buoyant. These pontoons (also called tubes) contain much reserve buoyancy and allow designers to create large deck plans fitted with a variety of accommodations including expansive lounge areas, stand-up bars, and sun pads.

3. Pontoon bridge - Wikipedia

   en.wikipedia.org/wiki/Pontoon_bridge

   A pontoon bridge (or ponton bridge), also known as a floating bridge, uses floats or shallow-draft boats to support a continuous deck for pedestrian and vehicle travel. The buoyancy of the supports limits the maximum load that they can carry. Most pontoon bridges are temporary and used in wartime and civil emergencies.

4. Dolphin (structure) - Wikipedia

   en.wikipedia.org/wiki/Dolphin_(structure)

   Wood pilings grouped into a pair of dolphins serving as a protected entryway to a boat basin. A dolphin is a group of pilings arrayed together to serve variously as a protective hardpoint along a dock, in a waterway, or along a shore; as a means or point of stabilization of a dock, bridge, or similar structure; as a mooring point; and as a base for navigational aids.

5. Sail components - Wikipedia

   en.wikipedia.org/wiki/Sail_components

   The corner where the leech and the foot connect is called the clew. [8] In the case of a symmetrical spinnaker, each of the lower corners of the sail is a clew. However, under sail on a given tack, the corner to which the spinnaker sheet is attached is called the clew, and the corner attached to the spinnaker pole is referred to as the tack. [20]

6. Sponson - Wikipedia

   en.wikipedia.org/wiki/Sponson

   On flying boats – as first patented by Claudius Dornier and first used on the Kaiserliche Marine ' s German World War I flying boat, the Zeppelin-Lindau Rs.IV [3] [4] – a sponson can help extend the hull higher in the water, reducing drag and providing additional lift when the plane is taking off.

7. Bridge protection systems - Wikipedia

   en.wikipedia.org/wiki/Bridge_protection_systems

   There are several types of bridge protection systems used: [7] 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;