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A skeg (or skegg or skag) is a sternward extension of the keel of boats and ships which have a rudder mounted on the centre line. [1] The term also applies to the lowest point on an outboard motor or the outdrive of an inboard/outboard .
A surfboard fin or skeg is a hydrofoil mounted at the tail of a surfboard or similar board to improve directional stability and control through foot-steering. Fins can provide lateral lift opposed to the water and stabilize the board's trajectory, allowing the surfer to control direction by varying their side-to-side weight distribution.
Soft skin construction, such as Cush or Spacestick boards, adds an additional soft shell skin to the outside of a sandwich construction board. The soft skin is vacuumed to the cloth and epoxy so that the soft shell is exposed--- meaning the hard glass and resin are protected inside, and under, the soft cush skin.
A ship's draft/draught is the "depth of the vessel below the waterline measured vertically to the lowest part of the hull, propellers, or other reference point". [1] That is, the draft or draught is the maximum depth of any part of the vessel, including appendages such as rudders, propellers and drop keels if deployed.
Boat rudders may be either outboard or inboard. Outboard rudders are hung on the stern or transom. Inboard rudders are hung from a keel or skeg and are thus fully submerged beneath the hull, connected to the steering mechanism by a rudder post that comes up through the hull to deck level, often into a cockpit.
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Bowsprit held down by a bobstay Bowsprit with forestays and bobstays. The bowsprit of a sailing vessel is a spar extending forward from the vessel's prow.The bowsprit is typically held down by a bobstay that counteracts the forces from the forestays.
A clinker-built Viking longship, whose overlapping planks constitute "strakes". Garboard strakes and related near-keel members Diagram of typical modern metal-hulled ship’s exterior plating, with a single strake highlighted in red