Question

The outward curvature of the hull surface of the vessel above the water line is called as

• A. Sheer
• B. Flare
• C. Beam
• D. Keel

Hint:

- Flare = Outward lateral curve above the waterline (keeps the deck dry).
- Sheer = Upward longitudinal curve of the deck (raised bow/stern).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Naval architecture defines specific terminologies for the geometric curves, lines, and dimensions of a vessel's hull to evaluate stability and seaworthiness.

Step 2: Detailed Explanation:
- Flare: The outward curvature or widening of the hull surface above the waterline, especially towards the bow of the vessel. It provides extra reserve buoyancy to prevent the bow from plunging deeply into waves and helps deflect sea spray away from the deck.
- Sheer: The upward longitudinal curve of the deck from amidships toward the bow and stern.
- Beam: The maximum width of the vessel's hull.
- Keel: The heavy longitudinal structural backbone at the bottom of the hull.

Step 3: Final Answer:
The outward curvature is called Flare, which corresponds to option (B).