Sheer Line

五月 23, 2012 at 10:07 | 張貼於Uncategorized | 發表留言
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Sheer line

The projection on to the plane of symmetry of the intersection of deck with the side, or the intersection of a deck with the plane of symmetry of a ship when the deck has no camber. The amount of rise of a sheer line above its lowest point is called the Sheer, forward or aft.

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Boat design categories as defined by Institute Recreational Craft

二月 23, 2010 at 08:00 | 張貼於sail, sail boat, sailing | 發表留言
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Boat design categories as defined by Institute Recreational Craft:

Design Category
Wind Force
Beaufort Scale (knots)
Significant Wave Height
in meters (feet)
A – “Ocean" exceeding 8 (over 40 kts.) exceeding 4 (over 13 ft.)
B – “Offshore" up to and including 8 (34-40 kts.) up to and including 4 (13 ft.)
C – “Inshore" up to and including 6 (22-27 kts.) up to and including 2 (6.5 ft.)
D – “Sheltered waters" up to and including 4 (11-16 kts.) up to and including 0.5 (1.5 ft.)
A. OCEAN: Designed for extended voyages where conditions may exceed wind force 8 (Beaufort scale) and significant wave heights of 4 meters and above, and vessels largely self-sufficient.

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