Meeting and crossing, Inland

Agreeing to a starboard-to-starboard pass

Reply to two short blasts: agreed. Both vessels take the steps needed for a safe pass.

Two short blasts

Press play. One signal at a time.

Agreeing to a starboard-to-starboard passInland
Reply to two short blasts: agreed. Both vessels take the steps needed for a safe pass.
Inland Rule 34(a)(ii), 33 CFR 83.34(a)(ii)

Who sounds it

The other power-driven vessel, if it agrees.

How it's sounded

Short blast: about 1 second (Rule 32(b)). The rule sets no gap between blasts. 1 second is used here so the blasts stay distinct.

A short blast is about 1 second. A prolonged blast is 4 to 6 seconds. Clips use 1 and 5 seconds.

Worth remembering

Same signal back means agreed. Doubt means five short and rapid blasts, then precautionary action until a passing agreement is made.

The same sound elsewhere

These use the same pattern, so the rules you’re under and the situation decide what it means.

Study more

See every sound signal, try the free Rules of the Road practice test, or read who gives way, and how Inland differs.

Learn the whole set

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Sources

Inland Rule 34(a)(ii), 33 CFR 83.34(a)(ii)

Helm is an independent study aid, not affiliated with or endorsed by the U.S. Coast Guard or the National Maritime Center. This page is for study, not navigation guidance or legal advice. Check the current rules before you rely on anything here.