Fractional, in-line multi-spreader rig, deck-stepped mast, forward and aft lower shrouds. Alternatively baby stay and aft lower shrouds.

(Equivalent one-spreader rig is tuned in the same way) At the crane • Read the “At the crane” section on pages 20-21. • Lift the mast and place it on the T-base. • Attach the cap shrouds, backstay, forestay and lower shrouds. • Tighten the cap shrouds, forestay, backstay and lower shrouds hand-tight so that the mast is stayed both laterally and longitudinally. • Lower and remove the lifting strop. Move the yacht away from the crane. Runners are required to give sufficient longitudinal stability, and to obtain the required forestay tension. The backstays must be located as near the centre line of the hull as possible so as not to affect the lateral tuning. This type of rig is also found with single lower shrouds, in-line, and in that case checkstays are recommended to prevent excessive mast bend.
Backstay 15% Cap shroud15% Tuning • Tension both runners 15% of their breaking load.• Check the mast rake. Adjust if necessary using toggles on the forestay.• Tension the cap shrouds to 15% of the breaking load of the wire. See the “folding rule method”, page 29.• Straighten the mast using the aft lower shrouds and the intermediate shrouds. If necessary, adjust the rigging screws for the cap shrouds without changing the cap shrouds tension (slacken one rigging screw by exactly the same amount as you tighten the other one). Check that the mast is straight by sighting up the luff groove, all the way up from deck level.
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