This page is a merger of the Inland Navigation Rules and the International Regulations for Preventing Collisions at Sea (COLREGS). Differences between them are shown side-by-side (e.g. Rule 34(c) below) or noted in italic text (text unique to the COLREGS is also [square] bracketed), e.g. Rule 19(c) - Every vessel shall have due regard to...when complying with [the] Rules [of Section I of this Part] 4 through 10.

Rule 34 - Maneuvering and Warning Signals
International Inland
(c)When in sight of another in a narrow channel or fairway:

(i) a vessel intending to overtake another shall in compliance with Rule 9(e)(i) indicate her intention by the following signals on her whistle:
- two prolonged blasts followed by one short blast to mean "I intend to overtake you on your..."
(c) When in sight of another in a narrow channel or fairway:

(i) a power-driven vessel intending to overtake another power-driven vessel shall indicate her intention by the following signals on her whistle: one short blast to mean "I intend to overtake you on your..."

Numbering or titling differences are noted and separated by a vertical line, such as (d | e), Section | Subpart; where the left-side denotes the COLREGS and the right-side the Inland Rules. Immaterial differences are not noted, such as 'one' vice '1'.

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