Port-Starboard Decisions

At the regatta start, not only timing matters but also the tack choice: do you sail on starboard or port toward the line? This decision combines the rules, course preference and fleet dynamics. Those who consciously choose port and starboard at the start instead of drifting randomly often gain decisive metres before the start signal – or avoid costly protests and OCS situations. This guide shows when which tack makes sense, how to minimise conflicts and how to combine the decision with line bias and end choice.

Basics: Port and Starboard at the Start

Under the Racing Rules of Sailing (RRS), a boat is on starboard when the wind is coming from the port side; on port when the wind is coming from the starboard side. At the start, the fleet's tacks typically cross because boats approach from different positions and often tack shortly before the signal.

Why tack choice at the start is so important

Right of way: On different tacks, starboard generally has right of way over port (RRS 10).
Course freedom: The chosen tack determines whether you must cross, duck under or give way to other boats.
End choice: Pin end and committee boat end can be approached differently depending on tack.
First windward leg: Whoever starts cleanly and fast sails with clear air to the first mark – tack choice influences whether you end up in dirty air.

Start field and tacks: Overhead view of the start line (pin left, RC boat right). Wind comes from below. Green boats sail on starboard tack (wind from starboard), red boats on port tack. In the middle, crossing points mark the conflict zone between port and starboard.

Rules framework

RRS 10: On opposite tacks

When two boats are on opposite tacks, the boat on port must keep clear of a boat on starboard. At the start this means: a port boat steering toward a starboard boat must duck, bear away or tack in time – otherwise protest and penalty turns threaten.

RRS 11 and 12: On the same tack

When both boats are on the same tack, leeward-windward applies (RRS 11): the leeward (downwind) boat has right of way over the windward boat. This is relevant when you build up parallel to the line or squeeze out another boat on the same tack.

Start-specific particularities

RRS 29 and OCS: The line may only be crossed after the start signal. Anyone who starts too early risks OCS – regardless of port or starboard.
RRS 20 and room: When tacking near the line, room issues can arise; clear communication ("Tacking!") reduces collisions.
No right to a perfect start slot: Starboard alone does not guarantee a free slot – it only protects against port boats that would have to cross.

Steering port toward starboard in the hope the opponent will give way is a classic protest mistake. Better to decide early: duck, look for a gap or tack.

Starboard tack at the start: opportunities and risks

The starboard tack is the defensively stronger option because other boats on port must give way when they cross.

Advantages and disadvantages of starboard

Advantages: Legal superiority at crossings, aggressive approach to the favoured end, pressure on port boats.

Disadvantages: High competition at the favoured end, tacking manoeuvre with late tack choice, dirty air in lee, increased OCS risk.

Typical starboard scenario

You sail from the middle or lee of the line on starboard, aim for the pin end (if favoured) and hold course while port boats give way. Shortly before the signal you accelerate and cross the line at full speed.

Tip: Starboard pays off especially when you want to hold the favoured end and the fleet is tight. Plan the final build-up 90 seconds before the start – late tacking manoeuvres cost speed and nerves.

Port tack at the start: opportunities and risks

The port tack initially appears defensively weaker but offers tactical freedoms that experienced tacticians use deliberately.

Advantages and disadvantages of port

Advantages: Less traffic at some ends, more flexible end change through late tack, leeward position under RRS 11.

Disadvantages: Obligation to give way to starboard, metre loss through bearing away, harder access to the favoured end with strong bias.

Typical port scenario

You approach on port from lee, find a gap and tack 15–30 seconds before the start onto starboard – or stay on port with a thin fleet and a deliberate leeward start.

Decision matrix: when port, when starboard?

Situation

Recommended tack

Reasoning

Risk

Strong pin end favoured, tight fleet

Starboard

Right at favoured end, port boats must give way

OCS, protest with overly aggressive holding

Neutral line, course preference right (RC side)

Port → late tack onto starboard

Flexible access, less early fighting

Late tack costs speed

Light wind, few boats

Port or starboard depending on clear air

Air more important than tack right

Dirty air trumps tack advantage

Black flag / U-flag active

Conservative: starboard with distance

No OCS – one false start can disqualify

Giving up optimal end

Match racing / two-boat duel

Starboard to apply pressure

Force opponent onto port, match their reaction

Penalty for rule violations

Mid-field start, clear air prioritised

Port with early slot, then tack

Use gap, avoid end fight

Missing the favoured end

Comparison: port vs. starboard at the start

Characteristic

Starboard

Port

Right of way

Right of way at crossings

Obligation to give way to starboard

Fleet pressure

High at favoured end

Moderate, more flexible

End access

Direct at favoured end

Often via late tack

Tacking required

Low if chosen early

Late tack often necessary

OCS risk

Increased with aggressive pin end

Moderate, depending on timing

Ideal for

Advanced sailors, favoured-end fighters

Tacticians with clear-air strategy

Combining port-starboard with line bias and end choice

Port-starboard decisions do not stand in isolation. They are closely linked to favoured end and line bias:

Pin end favoured: Many crews choose starboard and fight windward left – port can find leeward gaps if you consciously give up metres.
RC end favoured: Port approach from lee, then late tack onto starboard at the right end is a standard manoeuvre.
Neutral bias: Tack choice based on fleet density and planned first leg – not on end advantage alone.

1

Check bias – assess favoured end and line bias

2

Set end target – choose pin, RC or middle

3

Observe fleet – density and competition at target end

4

Choose tack – port or starboard as decision point

5

Execute approach – build position and speed

6

Final tack and start – cross line at full VMG

Practical manoeuvres and timing

The late tack (port → starboard)

Minus 2 minutes: Position on port, observe gaps and competition.
Minus 60–30 seconds: Tack onto starboard, build speed.
Minus 15 seconds: Fine-tune course and speed.
Start signal: Cross line at full VMG.

Holding starboard at the favoured end

Minus 3 minutes: Build starboard, windward at target end.
Minus 1 minute: Hold position, watch port boats that must give way.
Start: Accelerate without unnecessary luffing.

Choosing port deliberately (leeward start)

Goal: Clear air instead of optimal end.
Manoeuvre: Stay on port below the line, leeward of competition.
After the start: Sail first tack cleanly, secure clear air early.

The fine timing of these manoeuvres is crucial – tacking too early or too late costs more than a wrongly chosen end.

Communication on board

Helm and tactician set tack strategy and fallback before the pre-start – e.g. "starboard pin end" or "port approach, late tack". Clear calls prevent panic when the fleet shifts shortly before the signal.

Important: One sentence before the pre-start is often not enough. Define plan A (tack + end) and plan B (alternative tack or middle) – wind shifts and fleet movements change the situation in seconds.

Checklist: port-starboard before the start

Bias and favoured end assessed
Plan A and plan B for tack choice defined
Fleet density at target end observed
OCS and protest risk for chosen tack evaluated
Timing for late tack (if port) defined
Crew informed about tack and manoeuvre
Competition on starboard/port scanned in last minute

Common mistakes

Tack choice without end plan – starboard chosen but wrong end of line targeted.
Too late tack from port – no speed left above the line.
Overvaluing starboard right – ignoring clear air and OCS risk.
Forcing port crossing – hoping starboard will give way; leads to protests.
No plan B – when end is full, no alternative on other tack.
Ignoring wind shift – bias changes, tack strategy outdated.

Frequently asked questions (FAQ)

Do I always have to start on starboard?

No, port is often tactically sensible, especially with a late tack.

Who has right of way when both are on starboard?

Leeward before windward (RRS 11).

May I sail on port to the favoured end?

Yes, but starboard boats have right of way; you must give way or tack in time.

What is better for beginners?

Conservative middle start with clear tack and sufficient distance from other boats.

Practical example: 470 fleet with pin bias

Pin end favoured, 25 boats: starboard at the pin brings top-5 chances but OCS and protest risk. Port with late tack from the middle delivers a clean start and clear air – at the cost of fewer metres. Experienced crews choose aggressively under medal system pressure, conservatively when discard safety matters.

Fleet behaviour at the start: Approx. 60% starboard at favoured end, 25% late tack from port, 15% leeward port start – with black flag the share of conservative middle starts rises.