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  2. Butterworth cover - Wikipedia

    en.wikipedia.org/wiki/Butterworth_Cover

    Butterworth hatches are not the main access hatches, but are the servicing hatches, and are generally closed with a metal cover plate with a gasket that is fastened to the deck by a number of bolts which stick up from the deck. Holes on the edges of the plate fit over these bolts and the cover is fastened down with nuts or dogs.

  3. Hold (compartment) - Wikipedia

    en.wikipedia.org/wiki/Hold_(compartment)

    Six large cargo hatch covers on a capesize bulk carrier ship as she approaches the Egyptian-Japanese Friendship Bridge. A cargo hatch or deck hatch or hatchway is type of door used on ships and boats to cover the opening to the cargo hold or other lower part of the ship. To make the cargo hold waterproof, most cargo holds have cargo hatch.

  4. Robert MacGregor (engineer) - Wikipedia

    en.wikipedia.org/wiki/Robert_MacGregor_(engineer)

    MacGregor steel hatch cover Robert MacGregor was a British engineer , who, during the 1920s, concerned over unnecessary losses of North Sea colliers , developed the first steel hatch cover. The design was simple and consisted of five articulated leaves that stowed neatly at the end of each hatch.

  5. Open hatch bulk carrier - Wikipedia

    en.wikipedia.org/wiki/Open_hatch_bulk_carrier

    The open hatch bulk carrier, often referred to as OHBC or conbulker, is designed to offer direct access to the hold through cargo hatches which extend the full width of the vessel. As a result, large cargo units can be lowered into place. If it is possible, the holds or hatches are designed around standard cargo unit sizes.

  6. Lake freighter - Wikipedia

    en.wikipedia.org/wiki/Lake_freighter

    The size of a lake freighter determines where it may work. The shallow draft imposed by the St. Marys River and Lake St. Clair restrict the cargo capacity of lakers. [ citation needed ] Poe Lock at the Soo Locks is the largest deep lock at 1,200 feet (370 m) long and 110 feet (34 m) wide.

  7. Steam locomotive components - Wikipedia

    en.wikipedia.org/wiki/Steam_locomotive_components

    Tender Attached rail vehicle that holds both water for the boiler and fuel such as wood, coal, or oil. [1] [2] [3]: 80 Cab (US+ and UK+) Footplate (UK+) Compartment where the engineer (US+) / driver (UK+) and fireman control the locomotive and tend the steam supply and firebox.