Auxiliary systems Flashcards
High pressure salt water main (HPSWM) maintains what pressure?
7 Bar
Uses for HPSWS (high pressure salt water system)
- Firefighting hydrants
- Pre wetting
- Fitted bilge and salvage eductors
- Emergency cooling to main propulsion
- Auxiliary machinery
- Making fresh water
- Flushing heads
Describe the S/W ringmain
- Runs around 2 deck
- Fitted with isolation valves that allow maintenece to proceed or for damaged sections to be isolated
- Supplies salt water to the services that need it.
What operations would require more than one Salt water pump to be running?
Flying operations
Describe Salt water pumps
- Takes from the sea & discharges into ringmain via Risers
- Has a 10% leak offf valve to prevent over pressurisation
- Can be operated from local & remote
- Electrically driven
- Minimum of 1 pump running, the other is on standby
Sprays are fixed fire fighting equipment supplied by the HPSWM, where can they be found?
- Magazines
- Paint lockers
- Inflam store
- Funnels
What is pre wet used for?
To wash the upper decks to clear them of Nuclear, Biological & Chemical (NBC) contamination.
Describe DC State 1
Is when there is a possibility of sustaining damage.
1.All pumps are running
2.Valves are shut
3.HPSWM is divided into zones
Describe DC State 3
During normal operations
1. One pump is running
2. Other pumps are on standby
3. All valves are open
At what temp do White metal bearings melt?
115 C
What systems are cooled by the Main propulsion circulation system?
- Gas turbines
- Plumber blocks
- Main forced lub system
- CPP (controlable pitch propeller)
What Machinery is cooled by the Auxiliary machinery circulation system?
- Diesel generators
- Air conditioning plants (ACP)
- Each piece of the Auxiliary machinery has its own S/W pump & has X Conn to allow maintence to strainers
What are the 2 reasons for using fresh water to cool machinery?
Fresh water/ Salt water Circulating System
- To stop corrosion
- Stop system from contamination
What is MARPOL 73/78
Enviromental compliance
Maritime Pollution
Inside special areas, where is discharge of oil allowed?
Enviromental compliance
- The ship is underway
- Oil content without dilution doent exceed 15ppm
- The ship has an Oily water seperating filter, with an oil discharge monitoring and control
Outside special areas when can you discharge oil & oily mixtures?
Enviromental compliance
- ship is proceeding en route
- Oil content without dilution doesnt exceed 15ppm
- Oily mixture is processed through oil filtering equipment
What is the IMO?
Enviromental compliance
International Maritime Organisation
Name 6 Special areas
Enviromental compliance
- Baltic sea
- North sea
- Irish sea
- Celtic sea
- English channel
- Black sea
What are the most common sources of oily water contamination?
Enviromental compliance
- Bilges
- Fuel systems
- Oil systems
- Cpp systems
Ships husbandry UNMAKE
To ensure the least amount of oil enters the bilge you have to…
Enviromental compliance
- Keep machinery spotless
- Monitor lub oil ready use tank
- No surficants used
- AFFF used only in real risk situations
- Eductors to be manned when in use
- Use shoreside facilities when alongside
Who must you tell about a spill?
Enviromental compliance
- OOD when in harbour
- OOW when at sea
Nautical miles
Name the regulations for discharge of black water at sea
Enviromental compliance
- Within 4NM - an IMO approved STP is in operation
- Between 4&12 NM an IMO approved system to dilute & disinfect the sewage.
- Over 12NM - No treatment needed
Grey water is defined as?
Enviromental compliance
- Bathrooms
- Sinks
- Galleys
What is the Vacuum pumping system (VPS) comprised of?
Enviromental compliance
- Electrically driven pumps
- Manifolds
- Hoses
