Meeting and crossing, Inland

Agreeing to a port-to-port pass

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

One short blast

Press play. One signal at a time.

Agreeing to a port-to-port passInland
Reply to one short blast: 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)).

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

Worth remembering

Agreement is the same signal sent back. If you doubt it's safe, sound the danger signal instead.

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

Helm drills every signal with flashcards and spaced review, on the web and iPhone.

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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.