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2. Jacob's ladder (nautical) - Wikipedia

   en.wikipedia.org/wiki/Jacob's_ladder_(nautical)

   Jacob's ladder (nautical) Members of Prince William ' s crew climb onto the main-top using the Jacob's ladder. The term Jacob's ladder, [ 1] used on a ship, applies to two kinds of rope ladders. [ 2] The first is a flexible hanging ladder. It consists of vertical ropes or chains supporting horizontal, historically round and wooden, rungs.

3. Fish ladder - Wikipedia

   en.wikipedia.org/wiki/Fish_ladder

   Pool-and-weir fish ladder at Bonneville Dam on the Columbia River Drone video of a fish way in Estonia, on the river Jägala FERC Fish Ladder Safety Sign. A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon, is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as ...

4. Lock (water navigation) - Wikipedia

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

   A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.

5. AOL Mail

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6. Accommodation ladder - Wikipedia

   en.wikipedia.org/wiki/Accommodation_ladder

   An accommodation ladder is a foldable flight of steps down a ship 's side. Accommodation ladders can be mounted parallel or perpendicular to the ship's board. If the ladder is parallel to the ship, it has to have an upper platform. Upper platforms are mostly turnable. The lower platform (or the ladder itself) hangs on a bail and can be lifted ...

7. Ballard Locks - Wikipedia

   en.wikipedia.org/wiki/Ballard_Locks

   Ballard Locks. /  47.66556°N 122.39722°W  / 47.66556; -122.39722. The Hiram M. Chittenden Locks, or Ballard Locks, is a complex of locks at the west end of Salmon Bay in Seattle, Washington's Lake Washington Ship Canal, between the neighborhoods of Ballard to the north and Magnolia to the south. [ 2]: 2 [ 3][ 4]: 6.