DC 306 Flashcards
what is the keel?
Backbone of the ship, all other steel parts are attached to the keel either directly or indirectly.
what is the frames?
Frames are attached to the keel, and are known as longitudinal frames.
What is a hull plate?
hull plate is fastened to the framework in longitudinal rows called strakes. Keel is the center strake.
What is Decks?
Floors of the ship are called decks. Divide the ship up and provide addition hull strength.
What is a bulkhead?
Interior of a ship is divided up into vertical compartments called bulkheads.
what is a common type of closure used for routine passage and access or egress into superstructure from wx decks, main passage or manned spaces?
Quick acting watertight door Ex; door leading to machine shop on 175’
what watertight door are either 4 6 8 10 or 12 dogged and provide access or egress to high usage places, which do not require rapid access?
Individually dogged WT doors- door leading to bridge of 110’
what are installed in interior or exterior where rapid access/egress is not required and usually found in low traffic are?
Raised WT Hatch ex; fwd of 65
What hatch is installed with interior and exterior areas where rapid access/egress are required?
Raised WT hatch with scuttle
Explain the method of compartment use?
Maindeck is 1 above main is 2 and so on
Below maindeck is 01 and so on
1 is for stbd and 2 is for port
Define Watertight integrity?
Door that is suppose to prevent water intrusion by all means.
What is X ray?
lowest degree set when ship is in no danger, inport or in well protected harbor.
What is yoke?
set and maintained at sea, entering or leaving port during peacetime, inport during peacetime
what is zebra?
Set during General quarters, or any time the ship is in danger.
what is modified yoke?
reduced during normal working hours at sea in good visibility and peacetime cruising.
what is circle x ray and circle yoke?
assigned to fitting that may be opended wo special permission by personnel proceeding to battle station, or routine inspection.
what is circle zebra?
Commanding Officer may authorize Circle ZEBRA closures and fittings to facilitate the feeding of the crew and to allow the use of selected sanitary space.
what is dog zebra?
Dog ZEBRA closures and fittings are required to be closed when material condition ZEBRA is set or during periods of darken-ship,
what is designation Willam (W)
which serve vital piping and ventilation systems, are classified WILLIAM.
what is circle william
These fittings are required to be closed only to prevent damage or for CBR defense.
What is modified zebra?
is less restrictive than ZEBRA and more readily allows the accomplishment of certain operational requirements.
what is dc closure log and max time a fitting can be left open?
is a record of the status of damage control classified closures and fittings. It is used to record the Cutter’s condition of Material Readiness and list violations, locked fittings and inoperable fittings.
DC Closure Log is normally kept on the quarterdeck inport, on the bridge at sea, and in Damage Control Central (DCC) during General Quarters (GQ) and General Emergency (GE). The DC Closure Log is maintained at all times,
When the ship is not manning the General Quarters (GQ) stations, permission to change the material condition of readiness must be obtained through:
- Damage control central (DCC) watch
* Officer of the deck (OOD)
what is a CCOL?
They provide an itemized list and location of all damage control classified fittings, and are used by personnel responsible for setting of material conditions of readiness.
Primary Fire Boundary
This area includes the bulkheads, deck, and overhead closest to and surrounding the fire
Secondary Fire Boundary
The secondary fire boundaries are set if the fire spreads past the primary fire boundary.
Primary Smoke Boundary
smoke boundary nearest the fire is designated as the primary smoke boundary and normally coincides with the primary fire boundary
Secondary Smoke Boundary
second smoke boundary that is located farther away from the fire.
Buffer Zone
The area between the inner and outer smoke boundaries established for a Class B fire in a machinery space.
what constitutes a fire boundary
Any physical barrier can be a fire boundary. Fire boundaries are generally set at fire zone bulkheads or watertight subdivisions, and at decks above and below the fire.
What constitues Smoke Boundaries?
Closed doors and hatches that lead to the fire space normally constitute a smoke boundary. Smoke curtains and smoke blankets are also positioned on doors and hatches.
What constitutes a flooding boundary?
A flooding boundary is established by first locating the bulkheads and decks that are dry and likely to remain dry. This normally constitutes a flooding boundary.
Primary flooding boundaries are the first set of watertight bulkheads and their closures. Secondary flooding boundaries are the next set of watertight bulkheads and their closures.
State the reason for establishing proper fire/flooding boundaries?
Fire boundaries help prevent the spread of fire.
Flooding boundaries help prevent the ship from taking on more water, with a subsequent loss of buoyancy and stability. Flooding boundaries help avoid progressive flooding and collapsing bulkheads.
How Pressure Affects the Rate of Flooding ?
As water pressure increases, a greater amount of water enters the ship until the level of the water in the flooded compartment reaches the level of the hole. Thereafter, the pressure decreases. As water is received into the hull, the ship settles and the hole is further submerged.
Discuss the importance of securing the source of flooding?
It is important to secure the source of flooding because flooding of compartments increases the load on the already damaged ship girder. The ship can break up unless the strength of fractured components can be replaced before the ship is further subjected to heavy seas. Partial restoration of main strength members can be accomplished only when the ship is at reduced speeds, with a calm sea, and when the destination is not too distant.
Discuss the reason for not securing the firemain system to stop flooding caused by a rupture in the system?
The firemain system draws water from the sea and distributes it throughout the ship. The firemain system is one of the critical auxiliary systems that may determine whether a ship survives battle damage. On most ships, the firemain also provides services critical for peacetime operation.
How many battle damage classifications?
- Large holes in the underwater hull.
- Small holes and cracks in the underwater hull.
- Holes in the hull above water.
- Punctured, weakened, buckled or distorted bulkheads.
- Flooded machinery compartments or other vital spaces.
- Warped or sprung doors and hatches.
- Weakened or ruptured beams, supports and other strength members.
- Ruptured or weakened decks.
- Wreckage that interferes with function.
- Ruptured or cracked pipelines.
- Severed electric cables.
- Broken or distorted foundations under machinery.
- Broken or pierced machinery units.
- Fire, with its attendant heat, smoke and other damage.
Two methods of reinforcing beams and frames?
Beams and frames can be reinforced by bolting or welding doubling plates or bars along the webs
Methods of Reinforcing Cracked Machinery Supports?
Strength can be restored to cracked, fractured or weakened supports under machinery by welding on side plates or angle
what is a simple rupture?
A rupture with no protruding edges, located on a straight section of pipe
what is elbo rupture?
A rupture with no protruding edges, located on a curved section of pipe.
what is a severed pipe?
A section of pipe that has been completely separated.
What is compound rupture?
A rupture having protruding edges, ruptures in fittings, mangled pipes, and similar piping damage.
What is Direct Compression?
Direct compression occurs when the pressure acting on the shore is parallel to its axis.
Measuring Shoring?
Measuring shoring is from the anchor point to the center of the damage; determines the length of the shore and the rise and run needed.
Strain on Shoring?
- When the shore is in direct compression, that is, when the pressure acting on the shore is parallel to its axis.
- When the shore is subject to pressure acting perpendicularly to its axis.
Angle of Shoring?
Angle of shoring are angles that are needed to be cut into each end of the strongback to properly place them for shoring.
Shore ?
A shore is a portable beam.
Wedge ?
A wedge is a block, triangular on the sides and rectangular on the butt end.
Shole?
A shole is a flat block that may be placed under the end of a shore to distribute pressure.
Strongback?
A strongback is a bar or beam of wood or metal that is used to distribute pressure or to serve as an anchor for a patch. The strongback is often shorter than a shore.
Discuss the Various types of patches that can be used to repair damaged piping?
soft patch used to patch small holes
Jubilee patch used to patch hoses
Snytho glass used to patch a hole with quick action.
what is a soft patch?
Small holes or cracks in low-pressure (150 psi) piping often can be repaired by soft patches
Jubilee patch?
The jubilee pipe patch is a modification of a commercial hose clamp
Syntho glass?
The syntho-glass patch is a patented fiberglass pre-impregnated composite that is activated by saltwater or freshwater, and is used when quick-action repair is critical.
What is erect shoring by using a wooden shor and framing square?
Wooden shoring can be laid out using a framing square. The framing square has three parts: the blade (the longest leg), the tongue (the shortest leg), and the heel (the outside corner between the blade and the tongue). The framing square has inches that are divided into twelfths (1/12).
describe the use of a shoring batten?
A Shoring Batten’s function is to measure the length of shores used in shoring. Damage repair party members extend the two sliding components to the required length and lock them with the thumbscrews on the length locking device. They then measure the angles of cut by adjusting the hinged metal pieces at the ends of the batten and lock the angle locking devices in place.
explain the steps of shoring a watertight door/hatch?
When shoring doors and hatches, the basic rule is to put as many points of pressure on the closure as it has dogs.
Hazardous Material
Hazardous Material (HM) is any material that, because of its quantity, concentration or physical, chemical or infectious characteristics, may pose a substantial hazard to human health or the environment
Hazardous Waste (HW)
Hazardous Waste (HW) is a solid waste or combination of solid wastes, which because of its quantity, concentration or physical, chemical properties meets the definition of HW in 40 CFR 261.3.
HM Labeling Requirements?
Manufacturers are required by Federal law to properly label their HM. Any materials purchased by the USCG are required to meet Federal law for labeling. The manufacturer-provided label should be used on HM.
HW Labeling Requirements?
All containers of hazardous wastes must be labeled so that the specific or generic name, hazard, and date of accumulation are clearly identified.
Material Safety Data Sheet (MSDS)?
The purpose of the Material Safety Data Sheet (MSDS) is to provide sufficient information concerning the safety and health hazards associated with a given material. It explains the special precautions to be followed when using and handling a given material, and provides guidance for dealing with accidental spills or fires.
DOD & CG Hazardous Materials Information System (HMIS
The Department of Defense (DOD) Hazardous Materials File (HMF) is a compilation of MSDSs available on microfiche, floppy disk, CD ROM or through telephone modem to the Headquarters mainframe computer. Access to the DOD system is limited due to its high cost
Hazardous Materials Information System (HMIS) for Material Safety Data Sheet (MSDS)
The HMIS for MSDS (111.2.1) is a database that can be accessed by contacting the MLC/Area safety office. If the information needed is not in the Coast Guard system, the MLC safety office has additional information on microfiche. Information requests should be as specific as possible.
Ships’ Hazardous Material List (SHML)?
The Ships’ Hazardous Material List (SHML) a list of HM authorized for use aboard surface ships. The list can be found on the CG HMIS.
List of Authorized HM Storage Locations
A list of authorized HM storage locations can be obtained from the Surface Forces Logistics Center (SFLC).
HM Inventory
A complete inventory list is required for all hazardous materials. At minimum, the list must include unit name, product name, manufacturer and address, FSN, and the location and use of each product. An MSDS shall also be provided for each hazardous material.
Hazardous Material User’s Guide (HMUG)
The Hazardous Material User’s Guide (HMUG) shall be readily available in every shipboard work center where hazardous materials are handled, used, distributed, or stored.
Safety Officer ?
Safety Officers are responsible to the CO or Officer in Charge for carrying out the unit safety and environmental health risk management
Hazardous Material Coordinator?
The Hazardous Material Coordinator is responsible for developing and maintaining a hazardous materials inventory list and Material Safety Data Sheets (MSDS) for all hazardous materials (general use consumables) in the workplace.
Hazardous Material Coordinators are also responsible for training crewmembers in the proper stowage, handling, and disposal of hazardous materials.
Individual Crewmember?
Individual crewmembers are responsible for complying with all hazardous material program requirements
Procedures for Disposal of HW ?
A Coast Guard unit which generates any hazardous waste in excess of 100 kilograms (220 lbs.) in any calendar month shall obtain an EPA identification number, package the waste, label the waste, and arrange for transportation to an approved Treatment, Storage, and Disposal Facility (TSDF). Units must also manifest all shipments of Hazardous Waste (HW), and ensure that personnel are adequately trained
HM Stowage Restrictions ?
Flammable materials must be stowed in approved flammable storerooms or approved flammable storage lockers.
Toxic materials must be stowed in cool, dry, well ventilated spaces separated from acids, caustics, and oxidizers. All containers must be sealed and protected from physical damage.
Corrosive materials must be stowed in their original containers, separate from other materials, in an approved, designated chest/locker. Corrosive materials must be cushioned against shock.
Oxidizers must be stowed in cool spaces where maximum temperature does not exceed 100 degrees Fahrenheit. They must not be stored in the same compartment with combustible materials such as fuels, oils, greases, paints, or cellulose products.
why do you govern damage investigation?
to prevent further damage from happening and to stop the source.
why investigate in pairs?
Investigators work in pairs. It may be necessary to have a helper standing by in case one gets fouled in wreckage or falls through a ruptured deck. Also, a helper can hold a flashlight or have a plug or a tool handy if urgently needed
what is maindrainage?
The main drainage system (213.1.1) is used in many newer ships to drain floodable voids used in counter-flooding after such voids have been flooded, and to empty fuel tanks ballasted with seawater .
what is the gauge on the main drainage mean?
The primary drainage system pumps and eductors have gauges (213.1.1.2.4) to let the operator know if the system is pumping water at the required pressure
what are Gravity drains?
Gravity drains are deck drains that use gravity to drain water out of cutter compartments within the ship
deck drain valves and over board discharge?
Deck drain valves (213.1.3.1.1.2) or closure valves are installed when piping pierces the ship’s side and passes through watertight decks. Deck drain valves prevent water flowing back through drainage piping as a damaged ship lists to one side or settles more deeply.
Loss of Firemain Pressure ?
Loss of firemain pressure may cause additional flooding to compartments and operational areas systems by having to re-route pumps and eductor equipment to deal with a new flooding threat.
Loss of Electrical Power to the Pumps that Feed the Eductors ?
If the installed pumps fail due to power loss, they may not be able to provide the required volume of water pressure to the eductors to drain the compartment space or area. This would result in rising water levels in the flooded areas and the possibility of a catastrophic event.
Battle Damage ?
Pumps and valves that survive battle damage must be able to operate from outside the space to avoid breaking watertight integrity and because entry may be blocked
Improperly operating an installed eductor?
Improperly operating an installed eductor in a dry sump when ventilation is secured, does not exist, or is inadequate for a confined space may threaten life by possible asphyxiation
Using an eductor in a closed space is hazardous?
Using an eductor in a closed space is hazardous; once the water level falls below the suction line, the eductor removes air from the space resulting in possible asphyxiation
