---
kind: "section"
citation: "46 C.F.R. § 170.250"
title: "46"
number: "170.250"
heading: "Types and classes."
url: "https://uscodex.org/cfr/46/170.250"
---

# §170.250. Types and classes.

- (a) **Watertight doors, except doors between cargo spaces, are classed as follows—**
  - (1) **Class 1—** Hinged door.
  - (2) **Class 2—** Sliding door, operated by hand gear only.
  - (3) **Class 3—** Sliding door, operated by power and by hand gear.
- (b) **The following types of watertight doors are not permitted—**
  - (1) A plate door secured only by bolts; and
  - (2) **A door required to be closed by dropping or by the action of dropping weights.**
- (c) Whenever a door of a particular class is prescribed by these regulations, a door of a class bearing a higher number may be used.

## Notes

### Authority

Authority: 43 U.S.C. 1333; 46 U.S.C. 2103, 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 79-023, 48 FR 51010, Nov. 4, 1983, unless otherwise noted.