Sail trim and telltale trainer
Good trim is not "pull everything tight." Match the sail to the apparent wind, watch telltales, keep the boat balanced, and make small changes early.
Telltale checkoff Helm simulator
Saved sail-trim mastery
Scores, lab runs, telltale checkoffs, and weak scenarios are saved in this browser as asa101.sailTrim.v1. Use weak review and queued repairs after a run to repeat missed telltale, course-change, overpowered, and reefing decisions.
Telltale diagnosis checkoff
Use this like a dockside oral-practical: select the scenario, check each gate you can explain out loud, then save proof as telltaleRuns and weak gates as telltaleWeak. Misses can be sent to the drill library.
Telltale trim lab
Set the heading and controls, then read the telltales. The lab scores attachment, balance, heel, and whether the controls match the point of sail.
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Trim rules this drill reinforces
Golden rule
Ease the sail until it just begins to luff, then trim in only enough to stop the luff. If in doubt, let it out.
Jib telltales
Both streaming aft is good. Windward/inside telltale lifting usually means trim in a little or bear away. Leeward/outside telltale stalled usually means ease.
Mainsail balance
If the boat heels too much or fights the helm, ease mainsheet/traveler, feather, flatten, or reef. Comfort and control beat perfect telltales.
Beginner trim sequence
- Set the course and identify the point of sail.
- Ease sheets as you bear away; trim sheets as you head up.
- Watch the leading edge and telltales. Make one small change at a time.
- If overpowered, depower first: ease, flatten, feather, or reef.
- Keep checking after every tack, jibe, puff, lull, or course change.