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  2. Rail integration system - Wikipedia

    en.wikipedia.org/wiki/Rail_integration_system

    A rail system mounted on top of a SIG SG 550 A dovetail rail on a rifle receiver for mounting a sight. A rail integration system (RIS; also called a rail accessory system (RAS), rail interface system, rail system, mount, base, gun rail, or simply a rail [1]) is a generic term for any standardized attachment system for mounting firearm accessories via bar-like straight brackets (i.e. "rails ...

  3. Canton Viaduct - Wikipedia

    en.wikipedia.org/wiki/Canton_Viaduct

    Canton Viaduct is a blind arcade cavity wall in Canton, Massachusetts, built in 1834–35 for the Boston and Providence Railroad. [2]At its completion, it was the longest (615 ft [187 m]) and tallest (70 ft [21 m]) railroad viaduct in the world; today, it is the last surviving viaduct of its kind.

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  5. Stanchion - Wikipedia

    en.wikipedia.org/wiki/Stanchion

    Stanchions and velvet rope. A stanchion (/ ˈ s t æ n tʃ ən /) is a sturdy upright fixture that provides support for some other object. [1] It can be a permanent fixture. In nautical terms, the stanchion is the thick and high iron that with others equal or similar is placed vertically on the gunwale, stern and tops.

  6. Transom (nautical) - Wikipedia

    en.wikipedia.org/wiki/Transom_(nautical)

    Vertical transom and stern of a modern cargo ship. In some boats and ships, a transom is the aft transverse surface of the hull that forms the stern of a vessel. Historically, they are a development from the canoe stern (or "double-ender") wherein which both bow and stern are pointed.

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  8. Anchor - Wikipedia

    en.wikipedia.org/wiki/Anchor

    One method of accomplishing this moor is to set a bow anchor normally, then drop back to the limit of the bow cable (or to double the desired scope, e.g. 8:1 if the eventual scope should be 4:1, 10:1 if the eventual scope should be 5:1, etc.) to lower a stern anchor. [9] By taking up on the bow cable the stern anchor can be set.

  9. Port and starboard - Wikipedia

    en.wikipedia.org/wiki/Port_and_starboard

    Port side and starboard side respectively refer to the left and right sides of the vessel, when aboard and facing the bow. The port and starboard sides of the vessel always refer to the same portion of the vessel's structure, and do not depend on the position of someone aboard the vessel.