Rules of the Road · Inland-Specific Provisions
A vessel on U.S. inland waters approaching a bend where sight lines are obscured must:
- AAnchor and sound the fog signal until the channel is clear
- BSound one prolonged blast, and any approaching vessel must answer with a prolonged blast✓ Correct
- CSound five short blasts and slow to bare steerageway
- DPost a lookout at the bow and proceed at normal speed
Explanation
Inland Rule 9(f) requires any vessel approaching a bend or area of a channel where other vessels may be obscured to sound one prolonged blast. This signal must be answered by approaching vessels with a prolonged blast. Both rulesets share this requirement; it is Rule 9(f) in Inland and Rule 9(f) in COLREGS.
Authority: Inland Rule 9(f)
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