DC, CHT, & Ballasting Flashcards
What is CHT?
What is the communication circuit?
- CHT is the system in which sewage is collected in a tank where it is held on board or transferred overboard or to a sewage facility
- CHT is the system. Sewage is what flows through the CHT system
- X52J
What is Soil?
What is Waste?
- Soil: Sewage: Black water. The waste of human origin from water closets (toilets) or urinals
- Waste: Grey water. Waste water. Discarded water from deck drains, lavatories, showers, dishwashers, laundries, garbage grinders, and medical facilities.
Where are the sewage tanks onboard USS Harpers Ferry located?
- Total of seven tanks
- Main CHT pump room 5-33-1-Q (14029 gallon)
- Port CHT pump room 3-107-2-Q (650 gallon)
- Starboard CHT pump room 3-107-1-Q (650 gallon)
- One in each main space and aux space (15 gallon)
What are the three modes of CHT?
- Inport: Sewage and grey water are collected in main CHT. Pump Controller switches are placed in Auto for discharge to a shore/ barge facility
- Transit: While transiting a restricted zone, sewage is diverted to the tank and Grey water is diverted to the overboard position. Pump controller switches are in the OFF position
- At Sea: Sewage and Grey water are diverted overboard. Pump Controller switches are place in the AUTO position
What is H2S?
- H2S is an odorless and colorless gas that may cause serious injury or death. Poisoning usually occurs from inhalation
Sewage Clean up?
- If a Sewage Spill occurs clean the area with hot potable water, stock detergent and Betadine/Wescodyne/Povidone-Iodine Solution.
- Personal Protective Equipment (PPE) : Disposable Coveralls, goggles, Faceshield, Rubber Boots, Laundry Bags, Impermeable Rubber Gloves
What is ballasting?
What is deballasting?
- Ballast: to expertly sink the ship for the purpose of Stability due to heavy seas, Amphibious Operations, Low Bridge or we have run a ground
- DEBALLASTING IS WHEN WE RAISE THE SHIP. PURPOSE FOR RAISING SHIP; SHALLOW WATER, AMPHIB OPS, BETTER FUEL CONSUMPTION
How many Ballast tanks are there? And how are they drained/ filled?
- 85 BALLAST TANKS ONBOARD. 69 FIFTH AND SIXTH DECK TANKS, 16 THIRD DECK TANKS
- 3RD DECK TANKS ARE FIRE MAIN FILLED AND GRAVITY DRAINED DUE TO BEING ABOVE THE WATERLINE.
- 5TH AND 6TH DECK TANKS ARE BELOW THE WATERLINE SO THEY ARE GRAVITY FILLED AND BLOW OUT WITH DBAC’S.
- TO FILL 5TH AND 6TH DECK TANKS YOU NEED TO OPEN SEA VALVE, SHUT BLOW, AND OPEN VENT.
- TO DRAIN 5TH AND 6TH DECK TANKS TO NEED TO OPEN BLOW, SHUT VENT, OPEN SEA AFTER PRESSURE BUILD UP
How many HPU’s are onboard and where are they?
What is the bullet?
What do HPU’s operate?
- 5 HYDRAULIC POWER UNITS ONBOARD (HPU). 1 ON REFFER DECKS, 2 IS BY MAIN 1’S ESCAPE TRUNK, 3 IS BY DEGAUSSING, 4 IS OUTSIDE REPAIR 3, 5 IS INSIDE STBD MACHINARY ROOM
- THE BULLET” IS THE SERVICE TANK TO HPU’S AND IT IS LOCATED IN HORSESHOE PWAY STBD SIDE
- FM FILL, SEA VALVE, AND GRAVITY DRAIN VALVES.
How many DBAC’s are onboard?
Where are they located?
How much PSI?
Can it be started from ballast control?
- 4 DEBALLASTING AIR COMPRESSORS (DBAC) ONBOARD. 1 AND 2 ARE IN FWD AC, 3 AND 4 ARE IN AFT DEBAC (STBD FANTAIL). NEED 8-12 PSI TO BLOW TANK. CANNOT START FROM BALLAST CONTROL ONLY CHANGE MODE OR TURN OFF.
Where is ballast control?
What is a list?
- BALLAST CONTROL IS NEAR STBD QUARTERDECK.
- LIST IS DEGREE FROM PORT TO STBD. TRIM IS FROM FWD TO AFT. 5 DEGREES IS ABNORMAL
- Both are read from a clinometer. just depends on position
What is draft?
- How deep the ship sits in water and can be read on the pier with numbers on the side of the ship. bottom of the number is 6 inches. Top of the number to bottom of the next number is 6 inches
How much water does an LCU need?
- 6-8 feet on the well
How much water does an LCAC need?
- 0-6 inches
How much water does an AAV (recovering) need?
- 3-5 feet
How much water does an AAV (launching) need?
- 1 foot
What are the four pipe patching methods?
- EWARP
- Soft patch
- Jubilee
- Banding Patch
What does EWARP stand for
- Emergency water actuated repair patch
What PSI can EWARP hold?
- 150psi
What systems cannot be patched with EWARP?
- Potable water
- Fuel
- Steam
What does the soft patch consist of?
- Wedge
- Gasket
- Marlin
- Oakum
What PSI can a soft patch hold?
- 150psi
What PSI can a jubilee patch hold?
- 100psi
What’s unique about the jubilee patch?
- Can be applied to pressurized systems
What are the components of a banding patch?
- Gasket
- Steel shole
- banding
- banding clip
- cutter
- banding tool
What PSI can a banding patch hold?
- 150psi
What is the minimal number of bands required?
- 3
What are the 5 portable dewatering equipment?
- S-type
- peri jet
- derbishire
- ESP
- P-100
What portable educators are operated by firemain?
- S-type
- peri jet
- derbishire
What type of power is used to operate the ESP?
- 440v
Who is authorized to activate the ESP?
- Repair electrician
What cannot be passed through the ESP?
- Fuel
- Hot water
- Debris (Strainer)
How many P-100 pumps do we have?
- 3
Where are the P-100 pumps located?
- Boat deck, STBD & Port quarterdeck
What type of pump is the P-100?
- Centrifugal pump
What is the fuel tank capacity on the P-100?
- 1.45 Gallons
What is the rated capacity of the P-100?
-20ft suction lift, 100 gpm@83psi
What is the primary purpose of the P-100?
- Primary: Firefighting
- Secondary: Dewatering
How many spaces are covered by halon?
- 10
What spaces are covered by halon?
- AMR1, AMR2, MMR1, MMR2, FLAM1, FLAM2, PAINT MIX, TROOP FLAM, JP-5 Pump room, Hazardous material ready issue
What actuates halon?
- 5Ibs CO2 bottle
What the pressure switches that’s actuated by C02?
- Lights and horns, Ventilation and dampeners, time delay
What are the three colors of lights used by halon?
- White (power available)
- Amber (actuated)
- Red (Halon discharged)
What state is halon in the bottles?
- Liquid state pressured with nitrogen (600psi)
What are the time delays for halon?
- 30+/-5 sec (unmanned)
- 60+/-10 sec (manned)
What is the purpose of the time delay?
- To allow for the vent damners to close
- for personnel to evacuate the space
how long does it take halon to cover the space?
- Within 10 seconds
What is the scientific name for halon?
- bromotrifluoromethane
What type of firemain do we have?
- Double horizontal loop
What deck are the loops on?
- 2nd deck
- 03 level
How many zebra valves isolate the system?
- 4
Where are the zebra valves located?
- repair 2
- AFT of armory 2nd deck
- 03 marine berthing
- FWD repair 4
How many fire pumps do we have?
- 7
What does AFFF stand for?
- Aqueous Film Forming Foam
How many AFFF stations do we have?
- 4
Where are the AFFF stations located?
- 2nd deck (1-AFT A/C, 2–AFT MMR1 escape trunk, 3-FWD armory, 4FWD ships laundry)
how large are the AFFF tanks?
- 800 gallons
Where are the AFFF refill stations located?
- 1st deck above the AFFF stations
What is the purpose of the AFFF proportioners?
- To maintain concentrate ratio
What is the concentrate ratio?
- 94% sea water to 6% AFFF
How do you activate the AFFF station?
- electrical: manual control valve
- hydralic: SOPV
Where can you activate the AFFF station?
- pushbutton at each AFFF station
What is SOPV?
- Solenoid operated Pilot Valve
What does AFFF provide to?
- VSA, VTA, well deck, flight deck, machinery room bilges (AMR&MMR only), JP-5 pump room, hose reels
What is the purpose of AFFF bilge sprinkling?
- To create a foam blanket, vapor lock over fuel or oil
How many main eductors do we have?
- 4
What are the eductors rated at?
- 650gpm
where are the eductors located?
-Main and aux spaces
What does PECU stand for?
- Portable Exothermic Cutting Unit
What is the PECU primary use?
- Accessing spaces to rescue personnel
What is the range of a 15Ib CO2 bottle?
- 4-6 feet from the horn
What is the 15Ib bottle length of time?
- 40 seconds
What is the primary class of fire for the C02 bottle?
- Class C
What does PKP stand for?
- Potassium Bicarbonate
What are the sizes of the PKP bottles?
- 18 and 27Ib
What is the range of the PKP bottles?
- 18: 19
- 27: 21
What is the range of the PKP bottles?
- 18: 10
- 27: 11
What does PKP do to electronic components?
- It’s corrosive
What class of fire does PKP combat?
- B
What is the range of a aportable 28Ib AFFF extinguisher?
- 15 feet
How long will the bottle last with continuous use?
- 55-65 seconds
What class fire does AFFF combat?
- A and B
How many gallons does AFFF produce?
- 16
What does NFTI stand for?
- Nava Fire/fighting Thermal Imager
What overhaul gear is in the repair locker?
- Rake, Shovel, Halogen, Axe, NFTI
What does CBR stand for?
- Chemical, Biological, Radiation
A chemical agent is what?
- A substance through chemical reactions within the human body produces lethal or damaging effects on personnel
What are chemical agents used for?
- Weapons of mass destruction to kill, injure, or incapacitate opposing forces
What chemical detector do we have?
- M256A1
What does it detect?
- Nerve, blister, and blood agents
What paper tests for agent?
- M8 & M9
What does M8/M9 paper detect?
- liquid nerve and blister agents
What is the response time for M8/M9 paper?
- 20 seconds (M8), 10 seconds (M9)
How does the paper identify agent?
- it changes color
What color can the M8 turn into?
- Yellow/ green (nerve), red (blister)
What color can M9 turn into?
- some shades of red, more sensitive than M8
What does MOPP stand for?
- Mission Oriented Protective Procedure
What installed chemical detector does harpers ferry have?
- IDPS-LR
What portable agent detector do we have?
- dry filter unit
How long do we have to deliver sample to shore facility?
- 24H
What gas mask do we have?
- M-50
What radiological detector do we have?
- AN-PDQ-1(IM-265) & (DT-680)
