Head-up plan view. You are at the centre of the rose, steering 000. A wake and bow wave mean machinery is driving her — read that first, then her aspect, then call it.
—Drill 001
Question 1 — who is the give-way vessel?
Question 2 — which rule decides it?
Give-way0/0
Rule0/0
Streak0
Reference card
Rule 12 — Sailing vessels
Different tacks: the port-tack vessel keeps clear. Same tack: the windward vessel keeps clear. The windward side is deemed the side opposite the mainsail — which is how you read the tack of a boat running wing-and-wing.
Rule 13 — Overtaking
Coming up from more than 22.5° abaft the other's beam. The overtaker keeps clear, whatever the vessel types, and this overrides every rule in Section II. A later change of bearing does not release her.
Rule 14 — Head-on
Power-driven vessels meeting on reciprocal courses. Both alter to starboard and pass port to port. No stand-on vessel. If in doubt, assume it applies.
Rule 15 — Crossing
Power-driven vessels crossing: the one with the other on her own starboard side keeps clear, and avoids crossing ahead.
Rule 18 — Responsibilities between vessels
Where the two are in different categories, this decides it — not which side she is on.
not under command
restricted in ability to manoeuvre
↑ keep clear of these
engaged in fishing
↑ keep clear of these
sailing vessel
↑ keeps clear of the above
power-driven vessel
Rule 3(b) / 25(e) — Sails up, engine on
A sailing vessel using her engine is a power-driven vessel, and drops to the bottom of the Rule 18 order. She must show a black cone point down by day, and by night switches to sidelights plus a masthead steaming light. On the plot, anything driven by machinery is drawn with a wake and a bow wave.
Rule 17 — Action by the stand-on vessel
Standing on is not a licence to do nothing. You may act when it becomes clear she is not acting, and you must act when collision cannot be avoided by her alone.