DARKEN SHIP BILL a. PURPOSE. To prescribe responsibilities and procedures for darkening ship. b. RESPONSIBILITY FOR THE BILL. The Damage Control Assistant (DCA), under the Executive Officer, is responsible for this bill. c. INFORMATION

(1) SMOKING LAMP. The smoking lamp is out on all weather decks and in any other place visible from outside the ship during darken ship.

(2) WHITE LIGHTS. No white lights shall be visible from outside the ship.

(3) FLASHLIGHTS. Only flashlights producing a dim red light shall be permitted in darkened spaces.

(4) WEATHER DECK ACCESS. Weather deck access shall be via doors and hatches equipped with either light locks or cut-out switches. All precautions necessary to prevent showing any light shall be taken.

(5) LIGHT LOCK SCREENS

(a) Light lock screens shall be rigged at all times. The screens maybe tied back when the ship is not darkened.

(b) The DCA may approve removal of specific light lock screens. Unrigged screens shall be stowed as directed by the DCA in a location convenient to the opening.

(6) HANGAR DECKS

(a) All hangar deck lighting shall be set up for automatic operation when darken ship is ordered.

(b) Hangar bay roller curtains may be open when turning up aircraft provided all white lights are out and fire doors are closed.

(c) All lifelines around elevator pits shall be rigged when preparing to darken ship. Unless operations require, they shall remain up at all times when the hangar bays are darkened.

(7) NAVIGATION LIGHTS. Navigation lights shall be extin- guished on orders of the OOD under the prescribed lighting measure. d. RESPONSIBILITIES

(1) HEADS OF DEPARTMENTS. Heads of department with assigned spaces shall:

(a) Ensure that spaces are darkened in accordance with the bill.

(b) Take additional action necessary to effectively darken their spaces when darken ship is ordered.

(2) DAMAGE CONTROL ASSISTANT. The DCA shall assign responsibilities to divisions for maintaining and closing DOG- ZEBRA fittings and shall supervise the darkening of the ship.

(3) DIVISION OFFICERS. Division officers of divisions assigned DOG-ZEBRA closure responsibilities shall:

(a) Ensure closure of all DOG-ZEBRA fittings assigned to their divisions when darken ship is ordered.

(b) Supervise the maintenance and promulgation of a division Darken Ship Bill listing the DOG-ZEBRA fittings that the division is responsible for and the names of personnel assigned to close them.

(c) Ensure that the Division Damage Control Petty Officer periodically inspects the closure of all DOG-ZEBRA fittings within division responsibility, and reports their initial closure to damage control central when darken ship is ordered.

(d) Ensure that all light traps under their cognizance are painted dull black and all light trap screens and automatic cut-out switches are in place and in good repair.

(3) Ensure that all DOG-ZEBRA fittings within division responsibility are stenciled on both sides with a red ”Z” encircled with a black “D”. e. PROCEDURE

(1) ACTION. When darken ship is ordered, the following action shall be initiated by designated personnel:

(a) Officer of the Deck

(1) Order the following word passed over all circuits of the lMC announcing system: “DARKEN SHIP; DIVISIONS CONCERNED MAKE DARKEN SHIP REPORTS TO THE OFFICER OF THE DECK (damage control central, when manned).”

(a) Illuminate navigation lights in accordance with the prescribed lighting measure. (b) Division Damage Control Petty Officers. Supervise the closure of all DOG-ZEBRA fittings assigned to their division.

(2) REPORTS

(a) Division Damage Control Petty Officers. Report to damage control central (if manned) or the OOD that all DOG- ZEBRA fittings assigned to their divisions are closed.

(b) Damage Control Central (if manned). Report the ship darkened to the OOD when all divisional darken ship reports are received.

(c) Security Patrols. Check the ship for lights con- tinually throughout the night and report all exposed lights to damage control central (if manned) or the OOD.