DC closure log.

DOG ZEBRA fittings

DIVISION DAMAGE CONTROL AND FIRE-FIGHTING EQUIPMENT - 12045_128

Military Requirements for Petty Officer 2nd Class - index
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When a fan room door must be kept open to supply air to a fan or to exhaust air from it, the door should have the same classification as that of the fan. For example, a fan room containing a YOKE fan has a YOKE door; a room containing YOKE and ZEBRA fans has a ZEBRA door. All other fan room doors are classified XRAY. A classification has no bearing on the security of a space. A space classified ZEBRA may, for security reasons, be locked during condition YOKE if the space is unattended. However, the locking must be reported to the DCA or to the OOD. When material conditions of readiness are being set, the ship’s first concern is the require- ment for watertight, airtight, firetight, and fumetight integrity. Living conditions and access Condition YOKE may also be modified in a similar manner when appropriate. All ships are required to prepare and maintain a DC closure log (fig. 7-6). Strict discipline must be maintained in the modification of a material condition of readiness. As mentioned before, you must obtain permission before you change a material condition setting in any way. Obtain the permission from the DCA or the OOD. During general quarters, repair party officers control the opening and closing of all fittings in the assigned areas. The repair party officers must keep DCC informed so that the ship’s DC closure log can be kept up-to-date. The closure log is maintained at all times, of to spaces are secondary requirements. During long whether the ship is in port or under way. The periods at general quarters, however, condition closure log is used to show the following: ZEBRA may, with the commanding officer’s permission, be relaxed to pass battle rations and • Where the existing material condition to allow the crew to use the head facilities. The readiness has been modified opening of certain weather-deck doors permits natural ventilation to replace the stuffiness at • The fitting’s type, number, and classifica- some general quarters stat ions with fresh air. tion Figure 7-6.-DC closure log. 7-19

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