MATERIAL CONDITIONS OF READINESS

Question 0

YOKE

Answer 0

SET AND MAINTAINED AT SEA, IN PORT OUTSIDE OF NORMAL WORKING HOURS. BOTH X-RAY AND YOKE CLOSURES AND FITTINGS AND SECURED.

Question 1

X-RAY

Answer 1

Set when the ship is in no danger of attack. All fittings classified X-RAY should be closed.

Question 2

ZEBRA

Answer 2

Set during General Quarters. All X-RAY, YOKE and ZEBRA fittings are secured

Question 3

WILLIAM

Answer 3

Opened during all material conditions. Secured only to control damage or casualties and to effect repairs.

Question 4

CIRCLE WILLIAM

Answer 4

Fittings that access ventilation. Always open and operating regardless of material condition. Secured only to prevent the spread of damage or for CBE defense.

Question 5

CIRCLE X-RAY/CIRCLE YOKE

Answer 5

…

Question 6

CIRCLE ZEBRA

Answer 6

Used to facilitate the feeding if the crew and to allow use of sanitary spaces in extended periods of condition ZEBRA.
CO’s authorization required.

Question 7

DOG ZEBRA

Answer 7

Required to be secured when condition ZEBRA is set. Located in decks and bulkheads exposed to weather. Secured during darken ship to prevent light from showing outside the ship.