Nautical Term: Superstructure
Definition of Superstructure
1. Superstructure refers to the sections of a vessel built on and above the upper or main decks. These areas may include structures such as masts, rigging, lifeboats, deckhouses, and other enclosed spaces.
2. In a more restrictive context, under the International Convention on Load Lines (1966), superstructure refers to a detached enclosed structure on the freeboard deck and extending transversely to within 4% of the breadth from the vessel’s sides.
Example: During a routine inspection, the crew of the cargo ship Seaworthy discovered a crack in the superstructure near the stern. The captain ordered the vessel to return to port for repairs. The superstructure damage was classified as a significant structural issue, and the repairs were expected to take several weeks.
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