Dolphin Striker

Schematic view of the bow of a ship, showing: A the martingale stay, B the dolphin striker and C the bobstay.

A dolphin striker (an older term for a martingale boom or simply a martingale; sometimes called a striker) is a small vertical or near vertical ancillary spar spanning between the bowsprit and martingale thereby redirecting the tension in the forward end of the martingale slightly more vertically. This vertical component is necessary to more effectively oppose the forestays’ mostly upward tension on the forward end of the bowsprit than would be the case in the absence of the dolphin striker.

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