Boom Vang (Kicking Strap)

A tackle, strut or powered control that restrains or adjusts a boom’s vertical movement.

Known as a kicking strap in British usage, it normally leads between the lower mast region and the boom. Tension controls leech shape and twist, particularly when the mainsheet no longer pulls strongly downward, while a rigid vang can also support the boom when unloaded.

The vang and its mast and boom fittings can carry high compression and tension loads. Excessive use can overload the boom or gooseneck, and tackles, pins, gas springs, hydraulics and attachment structure require inspection and controlled release.