Trimaran — Wind Direction & Sail Trim
Trimarans combine a narrow center hull with two outriggers (amas). They point high and accelerate quickly — watch for the windward ama lifting and ease sails to keep it planted.
Wind 90° off bow · Sail 45° off centerline
Sail Angle
Eased ~45°
Close Hauled
Wind: 30°–45°Trimarans point well thanks to the narrow center hull. Keep sails trimmed tight and watch for ama fly — ease if the windward ama lifts.
Sail Angle
Pulled in tight
Close Reach
Wind: 45°–60°Slightly off the wind. Trimaran acceleration is strong here — hold the ama down with hiking or sheet tension.
Sail Angle
Trimmed 25°–35°
Beam Reach
Wind: 90°Wind directly from the side. Fastest point for trimarans — watch ama fly and ease the mainsheet if the windward ama lifts.
Sail Angle
Eased ~45°
Broad Reach
Wind: 135°–150°Wind behind at an angle. Let sails out further. Trimaran stays stable with both amas in the water.
Sail Angle
Eased 60°–75°
Dead Run
Wind: 180°Wind directly behind. Sails all the way out. Beware of rounding up — trimaran rudders lose grip dead downwind.
Sail Angle
Fully out ~90°
When to Reef
If you think you must reef, then it may be too late already.
Reef early — before conditions force your hand. A well-timed reef keeps the boat balanced, fast, and safe.
| Reef Stage | Apparent Wind | Sail Reduction |
|---|---|---|
| Full Sail | 0–14 kn | 0% |
| 1st Reef | 15 kn | ~25% |
| 2nd Reef | 20 kn | ~40% |
| 3rd Reef | 25 kn | ~55% |
These are general guidelines based on apparent wind speed. Actual reefing thresholds vary with sail area, displacement, sea state, point of sail, and crew experience. Always consult your vessel's own reefing chart or manufacturer specifications.