46 C.F.R. § 119.530 Bilge high level alarms.
Title 46 - Shipping
(a) Each vessel must be provided with a visual and audible alarm at the operating station to indicate a high water level in each of the following normally unmanned spaces: (1) A space with a through-hull fitting below the deepest load waterline, such as a lazerette; (2) A machinery space bilge, bilge well, shaft alley bilge, or other spaces subject to flooding from sea water piping within the space; and (3) A space with a non-watertight closure , such as a space with a non-watertight hatch on the main deck. (b) A visual indicator must be provided at the operating station to indicate when any automatic bilge pump is operating. [CGD 85–080, 61 FR 922, Jan. 10, 1996; 61 FR 20556, May 7, 1996]
Title 46: Shipping
PART 119—MACHINERY INSTALLATION
Subpart E—Bilge and Ballast Systems
§ 119.530 Bilge high level alarms.

