BALLAST CONTROL & CHT Flashcards
How are the sea valves for the 5th and 6th deck tanks opened?
Hydraulic pressure from the HPU’s
Where are the HPU’s located?
Reefer decks; main 1 escape or above #6 A/C
Under post office
Repair 3’s p-way
STBD stern gate operating room
How many eddy pumps do we have?
2 (main CHT)
How many macerator pumps do we have onboard?
8
Why do we ballast?
Heavy seas Amphib OPs Low bridges When we run aground List correction Counter battle damage
How many CHT tanks do we have?
7
Main CHT
Port & STBD ejection
Main 1 & 2, Aux 1 & 2
How are the 5th & 6th deck tanks filled and drained?
Filled by gravity
Drained by DBAC
Where is ballast control located?
By STBD side quarterdeck
What gas are we most concerned with dealing with CHT?
H2’s
When do we use the 3 modes for CHT?
Inport - while pier side
Transit - within 3 NM
At sea - outside of 3 NM
How many ballast tanks do we have in total?
87
Why do we de-ballast?
Shallow water
Amphib OPs
Better fuel consumption
How many 5th & 6th deck tanks do we have?
69
How many modes does CHT have?
3
What does IDLH stand for?
Imminent Danger to Life & Health
How many 3rd deck pre-ballast tanks do we have?
18
What is grey water?
Sink
Shower
Deck drains
How many HPU’s do we have?
5
What are the 3 modes of CHT?
Inport
Transit
At Sea
How deep do we need to be at the sill to take in a LCU?
8 feet
What does the red & yellow lights indicate on the H2’s sensors?
Yellow - 8PPM H2’s
Red - 20PPM H2’s
How many gallons does each tank hold?
Main - 13,770 gallons
Port & STBD - 650 gallons
Main space tanks - 15 gallons
What is ballasting?
The controlled sinking of the ship
What is de-ballasting?
The controlled raising of the ships draft
What is black water?
Anything from the urinal or toilet
How deep do we need to be at the sill to take on an LCAC?
0-6 inches
What are the macerator pumps rated at and what do they do?
40 - 60 gallons per minute
Chop up debris into 1/4 inch pieces
What is some of the gear we use for a CHT clean up?
Tyvek suit - Poopy suit firefighting boots Gloves Face shield SCBA
What are the eddy pumps rated at?
300 gallons per minute
How deep do we need to be at the sill in order to recover an AAV?
4-6 feet
How deep do we need to be at the sill in order to launch an AAV?
1 foot
Sewage receiving station number 1
(6-73-3-E)
Sewage receiving tank #1 - 281 gallons
Macerator pump #3
Sump pump #2
Sewage receiving station number 2
(3-113-6-E)
Sewage receiving tank #2 - 295 gallons
Macerator pumps #1 & 2
Sump pump #1
Sewage pump room number 1
(6-39-0-E)
Sewage tank #1 - 26,162 gallons
Discharge pumps #1 & 2 - 150gpm @ 39PSI
Aspirator pumps #1 & 2 - 240gpm @ 13PSI
Comminutor - 8 in 1d
List & trim
List - degree from port - STBD
Trim - Fwd to Aft
*5 degrees is abnormal
both read from clinometer
Draft
How deep the ship sits in the water
Levels of H2’s
Yellow - 10 PPM’s
Red - 50 PPM’s
At 1000 - considered IDLH & be absorbed through the skin
Sewage clean up
Detergent
PPE;
- disposable gloves
- goggles
- face shield
- rubber boots
- laundry bag
- impermeable rubber gloves
4 DBACs onboard
1 & 2 - Fwd A/C
3 & 4 - Aft DBAC
8-12 PSI to blow tank
The bullet
Service tank to HPU
Located horseshoe P-way STBD side
HPUs operate
FM fill
Sea Valve
Gravity drain valves
Sewage pump room number 2
(5.5-76-1-E)
Sewage tank #2 - 27,496 gallons
Discharge pumps #3 & 4 - 150gpm @ 39 PSI
Aspirator pumps #3 & 4 - 240gpm @ 13 PSI
Comminutor - 8 in 1d
