When two sailboats meet, COLREGs Rule 12 decides who gives way with two straightforward tests. If the boats are on different tacks — one has the wind over her port side, the other over her starboard side — the port-tack boat keeps clear, no matter which boat is bigger or which one got there first. If both boats share the same tack, the windward boat, whichever one sits closer to where the wind is coming from, keeps clear of the leeward boat. If you genuinely can't tell which tack the other boat is on, you give way yourself, no exceptions. Whichever boat gives way needs to alter course early and obviously, usually by bearing away to pass astern of the other boat rather than pressing on toward her bow.

Right of way at sea isn't one rule — it's a set of roles assigned situation by situation, and two sailboats meeting is its own specific case. You already know the general shape from give-way and stand-on: one boat acts, the other holds steady. What decides which sailboat acts, when both boats are under sail, is COLREGs Rule 12 — and it comes down to two questions you can answer just by looking at where the wind is hitting each hull. Get the read wrong, or can't get a read at all, and the rule still has an answer ready for you. This guide walks through both tests, the fallback for when you're not sure, and what actually giving way is supposed to look like once you know you're the one who has to move.

Opposite Tacks: The Port-Tack Boat Gives Way

Two sailboats meeting on different tacks each have the wind hitting a different side of their hull: one has it over her port side — she's on port tack — and the other has it over her starboard side. COLREGs Rule 12(a)(i) settles this pairing with no ambiguity: the port-tack boat keeps out of the way of the other, every time. It doesn't matter which boat is larger or which one reached the crossing point first — tack alone decides. If you're on port tack and another sailboat is converging with you on starboard tack, you're the one who acts; she holds her course and speed as the stand-on boat. The figure below shows the shape of it: the port-tack boat's course bends away early, dropping in behind the starboard-tack boat rather than trying to beat her across.

A locator diagram on a pale cream background. Two small sailboat hulls converge toward a point near the upper-middle of the frame, under a shared trio of blue wind arrows pointing down from the top. The left hull is tinted warm orange with a soft orange halo behind it and labeled PORT; her bow points up and to the right. A solid orange arrow curves from near her bow down and to the right, passing well clear of the second hull and ending in an arrowhead beyond it. The right hull is plain white, labeled STARBOARD, her bow pointed up and to the left. Faint grey dashed lines trace each hull's original straight course toward the meeting point.

Same Tack: The Windward Boat Gives Way

When both sailboats have the wind on the same side — both on port tack, or both on starboard — Rule 12(a)(ii) uses a different test: position, not tack. Whichever boat sits further upwind, closer to where the wind is actually coming from, is windward; the other is leeward. The windward boat keeps out of the way of the leeward boat. Rule 12 itself defines windward a little more technically, as the side opposite wherever your own mainsail is carried — handy when you can read a boom but not the wind angle. For a normally trimmed boat the two readings always agree, since wind pressure carries the boom to leeward regardless of which test you use. On the water, position is usually the faster read: look at which boat is closer to the wind's source, and that's your answer.

A locator diagram on a pale cream background. Two small sailboat hulls sail on the same heading under a shared trio of blue wind arrows pointing down from the top. The upper-left hull is tinted warm orange with a soft orange halo behind it and labeled WINDWARD, closer to the arrows. A faint dashed line joins her to the lower-right hull, plain white and labeled LEEWARD, further from the arrows. A solid orange arrow curves from near the windward hull's bow down and across, ending clear of the leeward hull with an arrowhead pointing away to the right.

Can't Tell Her Tack? Give Way Yourself

Sometimes you genuinely can't read another boat's tack — she's far off, nearly bow-on, or angled so her boom isn't visible from where you sit. Rule 12(a)(iii) doesn't let that uncertainty become a reason to wait and see: if you can't determine with certainty which side the wind is on for the other boat, you keep out of her way regardless. It's a deliberately conservative rule, and it's meant to be — guessing wrong about someone else's tack, in either direction, is exactly the situation that turns two converging boats into a collision. Treat "I'm not sure" the same as "I'm the one who has to move," and act on it early rather than closing the distance while you try to get a clearer look.

A locator diagram on a pale cream background. In the lower-left, a sailboat hull tinted warm orange with a soft orange halo behind it is labeled YOU, an orange arrow curving away from her bow to the upper-left. In the upper-right, a second sailboat hull is drawn faint and pale, its sail and boom barely visible, labeled UNCLEAR. A dashed grey sightline runs between the two hulls under a trio of blue wind arrows pointing down from the top of the frame.

Giving Way Means Something Specific

Knowing you're the give-way boat only matters if the other boat can actually tell. The same standard that governs every give-way situation, Rule 16, applies here too: your action has to be early and substantial enough to be obvious, not a token nudge that leaves your intentions ambiguous until the last few boat-lengths. In practice, for two sailboats, that almost always means altering course — and easing sheets if you need to — enough to drop in behind the other boat, passing astern of her rather than trying to cross ahead. The figure shows both versions side by side: an early, wide turn that clears her stern with room to spare, against a late, small correction that's still aimed toward her bow when it matters. If you're racing rather than day-sailing, the Racing Rules of Sailing hand right of way between racing boats their own separate terms — Rule 12 above is what applies the moment either of you isn't.

A locator diagram on a pale cream background. In the lower-left, a sailboat hull tinted warm orange with a soft orange halo behind it is labeled GIVE-WAY. A solid orange curved arrow sweeps wide from near her bow up and to the right, ending well clear of a second hull with a checkmark beside it. In the upper-right, a plain white hull is labeled STAND-ON, holding a straight dashed course. A shorter, solid grey arrow runs from further along the give-way hull's original course up to just short of the stand-on hull's bow, marked with an X. A trio of blue wind arrows points down from the top of the frame.

Two sailboats meeting is one of the most common situations you'll actually face under sail, and it rewards being automatic about it — the moment you clock which tack you're each on, you already know who moves. SailStarter's lesson on sail meets sail walks through these same tests with interactive diagrams you can tap through scenario by scenario, building on the give-way and stand-on roles from the lesson right before it. If Rule 12 still feels like something you'd have to stop and calculate mid-maneuver rather than something you just know, that's exactly the gap a few short, visual lessons are built to close.