The short version
- Lift and header
- A lift lets you point closer to the windward mark. A header pushes you away from it. Every shift is a lift on one tack and a header on the other.
- Oscillating breeze
- When the wind swings back and forth, tack on the headers and sail the lifts.
- Persistent shift
- When the wind is moving steadily one way, sail toward where it's going — even though that tack is headed at first.
- Stay near the middle
- Close to the straight line to the mark you can take whatever the next shift gives you. Out at a corner you have no options left.
Lifts and headers
The wind is never quite steady. Its direction moves a few degrees, sometimes more, every few minutes. Upwind, those movements matter more than almost anything else, because they change the angle you can sail to the windward mark.
A worked example. The wind is from 000° (due north) and your boat sails 45° either side of it close-hauled: on starboard tack you head about 315°, on port about 045°. Now the wind veers — shifts clockwise — to 010°.
- The starboard boat can now head up to about 325°, closer to the mark. It has been lifted.
- The port boat is pushed down to about 055°, further from the mark. It has been headed.
A backing shift (anticlockwise) does the opposite: it lifts port and heads starboard. So every shift is good news on one tack and bad news on the other, and the skill is being on the right tack at the right time.
Baseline headings: knowing which is which
You can't tell a lift from a header by feel alone — the boat feels the same, the sails are trimmed the same. You need a reference. Before the start, sail upwind on each tack for a few minutes and note the compass heading you settle on. Those are your baseline headings. Do it more than once and you'll also see how far the wind is swinging, and how often. (More in the race warm-up.)
Then, during the race, compare. With the wind from roughly north, as in the example above:
- On starboard, a higher number is a lift (325° against a 315° baseline) and a lower number a header.
- On port, a lower number is a lift (035° against 045°) and a higher number a header.
Without a compass, use landmarks and other boats: if you're suddenly pointing at a spot on shore you couldn't reach last time on this tack, you've been lifted.
Oscillating shifts: tack on the headers
Most of the time, especially on lakes and in offshore breezes, the wind oscillates: it swings one way for a few minutes, then back the other, around an average direction. In that wind the rule is simple: sail the lifts, tack on the headers.
- Sail on a lift — you're pointing closer to the mark than average.
- When the wind shifts back and you're headed past your average heading, tack. The header on this tack is a lift on the other.
- Repeat. Each tack puts you on the tack that points closer to the mark.
Two cautions. First, don't tack on every flicker. A tack costs real speed (see how to tack faster), so tack on a header that has settled in and is a few degrees past your average, not on a one-degree wobble or a gust. Second, headers are compared with your average, not your last heading. Coming down off a big lift to the average isn't a header worth tacking on.
Persistent shifts: sail toward the new wind
Sometimes the wind keeps moving the same way — a sea breeze filling in, a front coming through, the wind bending round a headland. That's a persistent shift, and tacking on the headers gets it wrong.
In a persistent shift, the boats on the side of the course the wind is moving toward gain, again and again. If the wind is steadily veering (moving right), the right side pays. To get there you sail on port — the tack the veer heads — even though it feels wrong. You sail into the header first, then tack and ride the lift in to the mark, while boats that tacked on the first header sail into ever-worse wind.
| Breeze | What it does | What to do |
|---|---|---|
| Oscillating | Swings back and forth around an average | Tack on the headers, stay near the middle |
| Persistent veer (right) | Keeps moving clockwise | Go right: sail port while headed, then tack |
| Persistent back (left) | Keeps moving anticlockwise | Go left: sail starboard while headed, then tack |
| Can't tell | — | Stay near the middle and keep watching |
Telling them apart is the hard part. Watch the trend over the whole pre-start and the first beat, not the last minute; local knowledge and the forecast help.
Why the middle of the course pays
The straight line from the start to the windward mark is the rhumb line. Staying within reach of it keeps your options open, for three reasons:
- You can use the next shift whichever way it comes. A boat in the middle can tack on a header and still have room to sail the lift. A boat on the layline at a corner of the course can't: a header just pushes it below the mark, and a lift turns its whole trip out there into extra distance. See staying inside the laylines.
- You limit your losses. The further you are from other boats sideways, the more a single shift decides who's ahead. Sailing in the middle with the fleet keeps that gamble small.
- You don't reach the laylines early. Once you're on a layline, the next tack is forced and every shift after it is a loss.
None of this means sailing a straight line up the middle. It means taking shifts in the middle third of the course and only going to a side on purpose.
When a side is worth it
Sometimes a side is clearly better, and then committing to it is right:
- More wind. Darker water on one side means more pressure, and more pressure often matters more than a few degrees of shift.
- A persistent shift you're confident in.
- Current — less adverse current or more favorable current on one side.
- Geography — wind bending along a shore, or a wind shadow from land you need to avoid.
Even then, get there in good time, and don't overstay: tack back toward the middle before you reach the layline.
Doing it with Sail Tactician
Sail Tactician tracks the wind live from the courses you sail on both tacks, starting from the wind you set (Point to Wind: bow into the wind, one tap). It starts learning at the countdown, learns only on upwind legs, and takes over the live numbers after a few minutes of beating on both tacks. It won't wander more than 30° from a wind you set on the water — more from a forecast, which can be well off near a shore — so set it yourself.
Questions
What is a lift in sailing?
A wind shift that lets you point closer to the windward mark on the tack you're on. On starboard, a clockwise (veering) shift is a lift; on port, an anticlockwise (backing) one is.
What is a header in sailing?
A wind shift that pushes you further from the windward mark on the tack you're on. A header on one tack is always a lift on the other, which is why you tack on headers in an oscillating breeze.
Should you tack on a header?
In an oscillating breeze, yes — once the header has settled in and you're pointing a few degrees below your average. In a persistent shift, often not: sailing the header first takes you toward the new wind.
What is the difference between oscillating and persistent wind shifts?
An oscillating wind swings back and forth around an average direction; a persistent shift keeps moving the same way. Oscillations reward tacking on the headers; a persistent shift rewards sailing toward the side the wind is moving to.
Sources
Standard racing tactics for oscillating and persistent shifts. The wind-estimate finding is measured on Sail Tactician's own race recordings, a small sample. Sail Tactician behavior from the in-app User Guide, version 3.2.
What changed
- First published.
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