28.250—High water alarms.
On a vessel 36 feet (11.8 meters) or more in length, a visual and audible alarm must be provided at the operating station to indicate high water level in each of the following normally unmanned spaces:
(b)
A machinery space bilge, bilge well, shaft alley bilge, or other space subject to flooding from sea water piping within the space; and
(c)
A space with a non-watertight closure, such as a space with a non-watertight hatch on the main deck.