Hatches that do not have a scuttle and lead to the
Limited doors or scuttles from the weather deck
shaft alley and pump room
to the crew's galley
Scuttles in the deck to the shaft alley and pump
Doors from aviators and flight crew ready rooms
room
to the flight deck
Doors at the bottom of the trunk to the shaft alley
DOG ZEBRA fittings are marked with a red Z
and pump room
inside a black D. These modified fittings are secured
during condition ZEBRA and darken ship conditions.
Access to the steering gear power and ram room
You must have proper authorization to open fittings
Access to the chill room
with this classification when the ship is at either
condition ZEBRA or darken ship.
ZEBRA Fittings
DOG ZEBRA fittings marked with a red Z inside a
black D are as follows:
ZEBRA fittings are marked with a red Z, and these
closures are secured during condition ZEBRA. You
Doors to the weather deck, excluding those
must have proper authorization to open fittings with this
classified XRAY or YOKE, that do not have a
classification when the ship is at condition ZEBRA.
darken ship switch or a darken ship curtain
ZEBRA closures and fittings marked with a red Z
Air ports (portholes)
are as follows:
All remaining doors and hatches for routine
WILLIAM Fittings
access
WILLIAM fittings are marked with a black W.
Access to all shops, labs, commissary, utility,
These fittings are kept open during all material
control, and hospital spaces
conditions. WILLIAM fittings are secured only as
Access to all offices
necessary to control damage or CBR contamination
and to make repairs to the equipment served.
Access to equipment rooms occupied when
associated control room is in use
WILLIAM fittings are marked with a black W are
as follows:
Main access to machinery spaces
Vital sea suction valves that supply the main and
Access to issue rooms
auxiliary condensers, fire pumps, and spaces that
Access to the steering gear room
are manned during conditions XRAY, YOKE,
and ZEBRA
Access to the enclosed operating stations
Vital valves that if secured would impair the
Access to hangar and flight deck control stations
mobility and fire protection of the ship
Access to the garbage disposal room
CIRCLE WILLIAM fittings are marked with a
Access to the trash burner and bin room
black W inside a black circle. These fittings are
normally kept open, as is the case with WILLIAM
CIRCLE ZEBRA fittings are marked with a red Z
fittings. They must, however, be secured to prevent the
inside a red circle. These modified fittings are secured
spread of damage and as a defense measure when a
during condition ZEBRA. CIRCLE ZEBRA fittings
CBR attack is imminent.
may be opened with the commanding officer's
permission during prolonged periods of GQ. The
CIRCLE WILLIAM fittings are marked with a
opening of these fittings allows evolutions such as the
black W inside a black circle are as follows:
preparation and distribution of battle rations, opening of
Doors to the pilot house, flag bridge, and signal
limited sanitary facilities, ventilation of battle stations,
shelter
and access for aviation personnel to the flight deck.
When open, CIRCLE ZEBRA fittings must be guarded
Ventilation systems to main and auxiliary
so they may be closed immediately if necessary.
machinery spaces, generator spaces, and other
CIRCLE ZEBRA closures and fittings marked
s y s t e m s a n d fi t t i n g s s e r v i n g s p a c e s i n
with a red Z inside a red circle are as follows:
continuous use
3-15
