- The vang system shall be between the mast tang and the boom key fitting and shall be comprised of the vang cleat block, the vang key block, a maximum of two control lines, loops and/or “Optional” blocks for additional purchase with a maximum of 7 “Turning Points”.
- The vang cleat block shall be attached directly to the mast tang, or to an “Optional” swivel that shall be attached to the mast tang.
- A shackle may be used to attach the vang cleat block or the swivel to the mast tang.
- The swivel, shackle or swivel/shackle combination shall not exceed 80 mm in length when measured under tension.
- The vang key block may be fitted with a spare key.
- The key may be straight or bent, and it may be held in the key way with either tape, elastic or velcro.
- The vang key block may be replaced with an “Optional” vang key block which may have a spare key.
- “Optional “single blocks may be attached to one or both sides of the vang cleat block, using a clevis pin or bolt through the attachment hole in the vang cleat block.
- The mast tang hole may be drilled to take a larger pin.
- “Builder Supplied” Vang Cleating Fitting
- The vang cleat block may be replaced with a “Builder Supplied” vang cleating fitting which incorporates “Turning Points” and a cam cleat.
These photos show the 2 Class legal “Builder Supplied” vang cleating fittings:

- The fitting shall be attached directly to the mast tang.
- The fitting shall not be modified in any way