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Damage Control Overview. Why Learn Damage Control?. Fire… call the local fire department? Flooding… you either fix the damage or sink to the bottom Crew’s responsibility to handle any ship damage. Objectives. Objectives of damage control Damage control organization Prevention aspects of DC
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Why Learn Damage Control? • Fire… call the local fire department? • Flooding… you either fix the damage or sink to the bottom • Crew’s responsibility to handle any ship damage
Objectives • Objectives of damage control • Damage control organization • Prevention aspects of DC • Material conditions of readiness • Maintenance of DC equipment
Introduction • Damage control includes both prevention and remedial measures • Two basic objectives: • Take all practical preliminary measures before damage occurs to prevent it • Limit and localize damage when it does occur • DC abilities dependent upon prompt action by personnel
DC Organization • DC Organization a vital part of ship’s battle organization • Engineer & DCA in charge of actions • DC Central • Controlling station for combating casualties • Primary purpose is to collect and coordinate reports to determine what actions needed • Tracks casualties, maintains diagrams of status
DC Organization • Repair Parties • DC groups set up to fight casualties • Number & ratings of people determined by number of personnel on ship • Repair/DC lockers store equipment • Fire parties • Made up of portion of repair parties • Composition varies depending on ship size
Preventing Casualties • About 90% of damage control is done before the damage occurs -> PREVENTION • Must work to ensure structural strength and watertight integrity maintained • All personnel get trained in DC knowledge and procedures
“Compartmentalization” • Ships can have up to 600 watertight compartments • Barrier to fires and flooding • Prevents further damage • Not effective if watertight integrity is not maintained
Material Conditions of Readiness • All doors, hatches, scuttles, etc. classified and marked • Each material condition represents a degree of tightness/security • Maximum closure cannot be maintained at all times - why? • Three conditions of readiness
Material Conditions of Readiness • X-ray (X) • Provides least protection • Set when ship not in danger of attack (well-protected harbor) • Yoke (Y) • More protection • Set in unprotected harbor/after hours or normal underway • Zebra (Z) • Maximum protection • Wartime or General Quarters (GQ) • Localize fire/flooding X Y Z
X Y Z Special Classifications • Circle X and Y: • Letter within black circle • May be opened without permission, but must be closed after use • Circle Z: • Letter within red circle • May be opened during GQ for comfort of the crew with CO permission • Guarded while open so they can be shut immediately
W D Z Special Classifications • William (W): • Sea suction valves which serve vital systems cooling water. Closed only to prevent further damage • Circle W: • Letter within black circle • Ventilation fittings, which are normally open, are closed when NBC attack is imminent • Dog Z: • Letter within black ‘D’ • Closed during darken ship as well as General Quarters W
DC Equipment • Maintenance of watertight integrity & fittings • Chalk tests, air blast tests, & pressure tests used to ensure seals work properly • DC equipment is inspected and tested as part of PMS • DCA in charge of DC equipment with divisional DCPO’s assisting