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Primarily used to control the angle of the boom, and thereby the mainsail, this control can also increase or decrease downward tension on the boom while sailing upwind, significantly affecting sail shape. For more control over downward tension on the boom, a boom vang may be used. mainstay
A rudder angle indicator is a device used to indicate the present position of the rudder blade, usually fitted near the Ship's wheel on the bridge and in the engine control room. [ 1 ] Rudder angle indicator of the MS Nordstjernen (1956) Rudder angle indicator
In sailing, a boom is a spar (pole), along the foot of a fore and aft rigged sail, that greatly improves control of the angle and shape of the sail. The primary action of the boom is to keep the foot flatter when the sail angle is away from the centerline of the boat. The boom also serves as an attachment point for more sophisticated control lines.
An inclinometer or clinometer is an instrument used for measuring angles of slope, elevation, or depression of an object with respect to gravity's direction. It is also known as a tilt indicator, tilt sensor, tilt meter, slope alert, slope gauge, gradient meter, gradiometer, level gauge, level meter, declinometer, and pitch & roll indicator.
A jibboom (also spelled jib-boom) is a spar used to extend the length of a bowsprit on sailing ships. [1] It can itself be extended further by a flying jib-boom. [1] The heel (i.e. rear and lower) end of the flying jib-boom is attached to the jib-boom, and the heel of the jib-boom to the bowsprit.
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Kicking straps / boom vangs, which control a boom-footed sail's leech tension by exerting downward force mid-boom. Normally this is a system of highly geared blocks, of flexible stainless steel wire and low stretch cordage but recently some sail boats have a short spar instead, often of carbon fibre.
A new study found that Americans 40 and older could live over five years longer if they exercised as much as the top 25% of the population. Here's what to know.