Transport Canada
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Rules of the Road - TP 14352 E

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vessel diagram showing port, starboard and stern

Port

If a power-driven vessel approaches within this sector, maintain your course and speed with caution.

Starboard

If any vessel approaches within this sector, keep out of its way. (Note: This rule may not always apply if one or both vessels are sail boats.)

Stern

If any vessel approaches this sector, maintain your course and speed with caution.

diagram showing four vessels named a, b, c, and d.

A keeps clear of B - C keeps clear of A and B
B keeps clear of D - D keeps clear of A and C


diagram showing two vessels named a and b passing each other.

A blows one blast and alters course to starboard.
B blows one blast and alters course to starboard.


diagram showing one vessel overtaking the other, named a and b.

Any vessel overtaking another must keep clear.


diagram showing a powered vessel not crossing ahead of a sailing vessel.

A keeps clear of and must avoid crossing ahead of B.


diagram showing a power-driven vessel keeps clear of a sailing vessel

A power-driven vessel keeps clear of a sailing vessel.