---
kind: "section"
citation: "33 C.F.R. § 401.47"
title: "33"
number: "401.47"
heading: "Leaving a lock."
url: "https://uscodex.org/cfr/33/401.47"
---

# §401.47. Leaving a lock.

- (a) Mooring lines shall only be cast off as directed by the officer in charge of a mooring operation.
- (b) No vessel shall proceed out of a lock until the exit gates, ship arresters and the bridge, if any, are in a fully open position and the lock operator gives the “all clear” instruction.
- (c) When “Hands Free Mooring system (HFM) is used, no vessel shall use its engine(s) until the lock operator provides the “all clear” instruction.

## Notes

### Amendments

[81 FR 13746, Mar. 15, 2016, as amended at 89 FR 15961, Mar. 6, 2024]

### Authority

Authority: 33 U.S.C. 983(a) and 984(a)(4), as amended; 49 CFR 1.101, unless otherwise noted.

### Source

Source: 39 FR 10900, Mar. 22, 1974, unless otherwise noted.

### Amendments

[81 FR 13746, Mar. 15, 2016, as amended at 89 FR 15961, Mar. 6, 2024]