Week 3 Flashcards
What’s the function of HP bilge?
- Discharge overboard
- Pump water overboard from flooded compartments
- Provide back up for HP ballast pump
What is the function of the MP ballast system?
- Adjust subs buoyancy using M comp tanks
- Use MP pump as trim pump
- Supplies sea water for firefighting
Function of valves
- Allow opening and shutting of fluid pathway
- Hydraulic accumulator facility
Uses of trim system
Adjust pitch and heel of submarine
Who is the Hover system operater from normally?
Ship Control Console Operator
What tanks are associated with the Hover system?
- Pressurised Water Tank
- M compensating tanks
What pumps are used during Hover operation?
MP ballast pumps
When do we use the Hover system?
- Chalfont
- Slow speed depth control
What is the normal operation of the Priming System?
Auto Remote
At Sea who operates the ballast system?
SCCO which is a suitably qualified senior rate
In harbour who operates the ballast system
Cn be a Junior Rate or duty FWD technical rating
Who operates the LP bilge system?
- Electrical Panel Operator
Who operates the HP bilge system?
SCCO
Where can the submarines Ballast be operated from?
- SCC (via PMS)
- SCC (via reversionary panel)
- Locally
At sea who is the Trim system operated by?
SCCO who will be SNR ME or WE rating
In harbour who operates the Trim system?
- Duty senior rate or junior rating
Where can the trim system be operated from?
At the SCC VIA PMS
Or locally
Who is the bilge and ballast system operated by?
SCCO using PMS
What is the system code for the priming system?
PS
What makes up the Bilge/Ballast priming system?
- Vacuum tank
- Pump
- Sealing water tank
What are the key components of the Ballast system?
- Compensating tanks
- HP Ballast pumps
- MP Ballast pumps
- Ballast Hull valves
- Hydraulic control valves
What are the uses of trim?
- Adjust pitch and heel
- Alternative means of cooling
- Sea water supply for domestic use
What is the system codes for HP and LP bilge systems?
BS
What is the system code for trim and ballast systems?
WS
What is the function of the astute LP Bilge system?
- It collects water from the bilge areas maintaining clean and dry conditions, it also collects waste water from tanks serviced by systems
- Remove oil from dirty bilge water ready to discharge overboard
- Discharge ashore contents of the Clean Bilge Tank, Dirty bilge tank, Contaminated oil tank, Non active drain tank and the precipitator drain tank.
What are the methods of trim operation
Locally and remotley
What does priming prevent
Damage to the pumps
What tanks are associated with the trim system?
- TOT (torpedo overflow tank)
- FWD and AFT trim tanks
- Water retention tanks
Function of the ballast system
- Adjust bodily weight
- Used for firefighting
- Rapid deballasting
What are the 2 speeds of the MP ballast
Fast- Balssating
Slow- Trimming
Function of Hover
Slow speed depth keeping
Chalfont
What are the main international conventions on marpol
Marpol 73/28
What tanks are in the bilge system?
- Clean bilge
- Dirty bilge
- Oil
- Non active drain
- Precipitator drain
What does the trim pump do and how is it operated?
- Moves sea water from one tank to another dependant on required trim.
- Operated both locally and remotely
What are the hazards associated with these system?
- Flooding
- Contamination
- Internal leaks
What is the function of the HP ballast system?
- Adjust subs buoyancy using O comp tanks
- Back up HP bilge system
- Pump water overboard from flooded compartments
What’s the function of LP bilge?
- Collect water from bilge to maintain clean and dry conditions
- Remove oil from dirty water
- Discharge ashore
What can the HP ballast system do in case of emergency?
Rapid deballasting
What are the major gases used on board submarines?
Air and Nitrogen
Where is nitrogen gained from?
Shoreside facilities
What is the function of nitrogen bottle groups?
To Provide a stored Reservoir of nitrogen for:
- Vogs
- Firefighting
- Hydraulic accumulators
- SG blanketing and sparing
What is the function of nitrogen reducing stations?
Reduce the pressure of stored nitrogen for lower pressure ship services:
- fire fighting
- SG blanketing
What is the function of HP air system?
Compress, store and distribute clean dry air at 276 bar
Where does HP air supply?
- AV&B
- Diver quality air for chalfont
- Air for reactor services
- Charging EDBA
How many main bottle groups make up the HP air system?
4 groups split 56 bottles
What is the purpose of a group isolating valve?
- Isolate 4 bottle groups from the ring main
- Operated local and remote
What is the purpose of integrity valves?
- Ensures even during loss of one side of the system HP air will still be supplied
- Normally Open
What is the purpose of bulkhead isolation valves?
- Allow for isolation of certain sections of the HP air system whilst supplies continue elsewhere
- Normally open
What is the purpose of cross connection valves?
- Allow both port and starboard ringmains to be connected
- Normally shut
What is the purpose of captains valves?
- These connect the emergency bottle group to HP air ringmain
- Co must give permission to operate
What is the function of the emergency blows system?
- Assist HP blow for emergency at other depths than periscope
What’s the function of the HP blow system?
- Blow the main ballast wuth air at periscope depth
Name some of the functions of the LP blow system
- Achieving full buoyancy
- Assist in surfacing from periscope depth
- Ventilation and purging
- Alter submarines atmosphere
- Reduce submarines pressure prior to opening hatches
What are the key operating parameters on board?
- Bottle groups at 276 bar
- Control air at 28 bar
- 24V for remote operation and indication on SCC
Who’s permission is needed to operate LP blow when alongside?
Manoeuvring room watchkeeper
What is the system code of nitrogen?
N
What are the functions of the nitrogen distribution system?
- Water mist fire fighting system
- SG blanketing and sparging
- Hydraulic power plant accumulators
- VOGS
When is HPA used to charge VOGS
Only in emergency when nitrogen isn’t available
If a gas burst occurs FWD of 64 Bulkhead what do we treat it as?
HP air burst
If a gas burst occurs aft of 64 bulkhead what do we treat it as?
HP gas burst
What is the system pressure of the AV&B
28 bar
How is AV&B sourced?
HP air system via main composite reducing stations
What is the system code of the AV&B system?
AV
Where are the main 4 composite reducing stations relating the AV&B?
- ships office
- 1 deck stbd side
- Manouvering room
- Thrust block stbd
Who operates AV&B
SQEP
Why is hydraulics used on board?
- Relatively quiet
- Compact
- Easy to extend through hull
- Simple and reliable
Hydel local control valves modes of control are what?
- Single acting
- Double acting
Name some of the uses of hydraulics on board
- Move control surfaces
- Operate tunnel doors
- Operate masts and shutters
- Hull valve operation
- Toredo system ie bow caps and flap valves
What is a proportional control valve?
Is used to control surface movement
What is OX30
- Red in colouring
- incompressible
- Prevents corrosion
- Self lubricating
- Emulsifiers upon water contamination
What are the 3 main pipework sets in a hydraulic system?
- Supply
- Return
- Replenishment
What are the hazards of hydraulics?
- Misting from the burst
- Ignition due to flammable nature
- Slippage
What can hydraulic hazards cause?
- Dermatitus
- Hydopermic injection
- Problems from inhilation
Hydraulic systems have moving machinary attached list some which could cause injury
- Valves
- Masts
- Hydraulic rams
- Bulkhead doors
Name the 4 hydraulic plants on board
- Main hydraulic plant
- Standby main hydraulic plant
- External hydraulic plant
- Steering and hydroplane hydraulic plant
Where are all hydraulic plants originally operated from?
- in the manoeuvring room at the Electronic Wing Panel (EWP)
Name the 3 hydraulic systems on board
- Main hydraulic system
- External hydraulic system
- Steering and hydroplane
Where can hydraulic systems be operated from?
- EWP
- SCC viapms
- Local control panels
