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What do Air Conditioner Units do for electrical/electronic equipment and crew comfort?
Maintains proper humidity, and provides cooling ventilation
What type of A/C units do we have onboard?
What type of refrigerant is used?
250 Ton Single-Stage Centrifugal
Where are #1 and 2 air conditioning plants located?
FWD A/C (Below FWD mess Decks)
Where are #3 and 4 A/C plants located?
MID A/C (Below print shop/LRC)
Where are #5 and 6 A/C plants located?
AFT A/C (Down near cleaning gear issue/shaft alley)
What is the purpose of the Reefer Units?
Maintains chill box and freezer box temperatures for ship's stores and food storage
What type of Reefers do we have?
What type of refrigerant?
8 Ton Reciprocating compressor type
Where are the Reefer Units located?
FWD A/C (Below FWD messdecks) #1 and 2
What is the purpose of the Freeze box?
Used in the preservation of the ship's stores, operating parameters are between -3deg and 2deg F
What is the freeze box located?
Freeze Storeroom, 6-52-2-A
What is the purpose of the Chill Box?
Used in the preservation of the ship's stores, operating parameters are between 33deg and 38deg.
What are locations of the 2 chill boxes?
Chill storeroom/Vegetable Box 6-52-1-A
Chill storeroom/Dairy Box 6-52-3-A
What is the purpose of the Emergency Diesel Generators?
Provide emergency power to ship's vital loads in the event of a loss of ship's service turbine generator.
Used to restore the Propulsion plant and normally aligned for auto start.
Where is #1 EDG located?
#1 EDG is located in FWD EDG 6-30-0-E
What is the spects of the #1 EDG?
Caterpillar 8 cylinder, 450 volt, 60 hz, 1200amp, 750 kw
Where is #2 EDG located?
#2 EDG is located in FWD EDG 6-109-0-E
What are the specs for #2 EDG?
Caterpillar 8 cylinder, 450 volt, 60hz, 1200amp, 750kw
What is the purpose of the Ship's Service Diesel Generator?
Provides power to ship's electrical distribution system. Used as a ship's service generator and also as a back up in the event of a loss of ship's SSTG.
Where is the SSDG located?
SSDG room 5-133-1-E
Caterpillar 16 cylinder, 450v, 60hz, 2920amp, 1825kw
What is the purpose of the steering motors?
- There are 2 (port/stbd)
- Electric motor coupled to the hydraulic pump to rotate pump.
What is the purpose of the Steering Pumps?
- There are 2 (Port/stbd)
- Variable stroke positive displacement pump, pumps 2135th hydraulic fluid to the rams and cylinders
What is the purpose of the Trick Wheel?
Allows steering capabilities in AFT-steering, 1 for each steering unit. Only qualified aft-steering helmsman and auxiliary div personnel can steer from aft steering.
What is the purpose of the Ram Assembly?
We have 4, 2 for each steering unit. Port/stbd, configured in a push/pull configuration attached to the yoke that turns the rudder.
What is the purpose of the Emergency Steering Hand pumps?
We have two, used only in emergency situations to move the rudder.
What is the purpose of the Manual Transfer Valve?
Allows the selection of steering unit to be used, Port, stbd or locked. Locked position will be used only when steering units are de-energized
Describe the Helm operation.
Located on the bridge, uses an IC circuit to send an electrical signal to aft-steering where it is converted into mechanical motion of the rudder in aft-steering
Describe the operation of the Trick Wheel.
Located in aft-steering, 1 for each steering unit, allows the steering of the ship from aft-steering.
Describe the operation of the Hand Pumps.
60 turns using 1 pump or 30 turms using 2 pumps equal 1 degree rudder movement.
Locks rudder in place. Last resort if all other methods have failed
What can you find in FWD EDG?
#1 HPAC- Provides HP air 2700-3000 PSI for SCBA recharge stations, supplies HP/LP reducer in engineroom in the event of loss of LP air.
What is in FWD A/C?
- #1,2 Reefers
- #1,2 A/Cs
- #1 Fire Pump- 1,000 GPM provides firemain and flushing water
What is in MID A/C?
#3, 4 A/Cs
What is in Aft EDG?
- #2 EDG
- #2 HPAC- Supplies HP/LP reducer in engineroom in the event of loss of LP air
What is in the SSDG Room?
What is in Aft steering?
Port/Stbd steering units
What is the function of the ship's service 60hz Electrical Distribution System?
To distribute 450v AC and 120v AC electric power throughout the ship.
What does the SSTG provide?
How many do we have?
Provides 450VAC 60hz electrical power for shipboard distribution.
3SSTGs **Uses Steam to Operate**
Where is SSTG 1A located?
Fireroom upper level port side
Where is 1B SSTG located?
engineroom upper level stbd side
Where is 1C SSTG located?
engineroom upper level stbd side
What are the specs of the SSTG?
450VAC, 60Hz, 3200amps, 2000kw
What is the purpose of the EDG?
Provides emergency 450VAC 60Hz electric power to vital and semi-vital load centers in case the ship loses normal power.
What is the purpose of the SSDG?
Stand by generator for casualty situations.
What is the purpose of the Ship's Service Switchboard?
- BLR has 3
- 1S- Provides normal power to load centers 31, 32A, 41, 42, 43A, and 51
2S- Provides normal power to load centers 11, 21, 22,23, 32B, 33, and 43B
3S- Provides normal power to load centers 44, 61
Where are the ships service switchboards located?
1S- Upper Level stbd side engineroom
2S- Upper level stbd engineroom
3S- EOS next to SSDG
All switchboards contain what 3 things?
- Generator Breakers (GCBs0
- Bus-Tie-Breakers (BTBs)
- Load Center breakers
What is the purpose of the emergency switchboards?
provides VITAL and semi-vital load centers emergency power in case the ship loses it's normal electric power source.
How many emergency switchboards does the BLR have?
What does emergency switchboard 1E provide power?
Load Centers 32B, 43B, 22, 23
What does the switchboard 2E provide power to?
provides power to Load Centers 32A, 43A, and 42.
Where is the SCU located?
What does it do?
Overall control of 60hz and 400hz electrical plant
What does GCBs (Generator Circuit Breakers) do?
connects and disconnects the generator to its associated switchboard. Located on all switcgboards.
What does the Bus Tie Breakers do?
Used to connect and disconnect switchboards to other switchboards. Located on all switchboards.
What do circuit breakers do?
used to energize and de-energize load centers, panels, fuse boxes, and specific equipment loads. Located on all switchboards, load centers, and breaker panels throughout the ship.
What does the load centers do?
distributtes 450VAC, 60HZ to certain zones and/or specific loads. BLR has 15 (60Hz) load centers.
What is the purpose of the Ship's Service 400Hz Electrical Distribution System?
to provide special frequency regulated power for various types of shipboard electronic equipment to ensure a more constant source of power for efficient operation. Equipment such as ships gyro, HESS, etc.
What is the purpose of the Special Frequency Converters?
- Used to convert 450VAC 60Hz into 450VAC 400Hz
- There are 2.
- NR1 SFC is located in 1EDG room.
- NR2 SFC is located in 2EDG room
Where are the 400Hz load centers located?
NR1 SF load center is located in located in load center 21/22/44
NR2 SF load center is located in load center 31 room
What are the primary and secondary power sources for NR1 SFC & NR2 SFC?
NR1 SFC- primary load center 11, secondary 1E switchboard.
NR2 SFC- primary load center 51, secondary 2E switchboard.
What are the 15 load centers?
11, 21, 22, 23, 31, 32A, 32B, 33, 41 and 42, 43A, 43B, 44, 51, 61
Which load center is located near repair Repair Locker 2?
Which load center is located near CCC office?
21 & 22
Which load center is located near FWD A/C?
Which load center is located near Repair Locker 5?
Which load center is located near Upper Level portside fireroom?
Which load center is located near Upper level starboard side fireroom?
What load center can be found near MID A/C?
Which load center is located near Port side, ladder going to smoke deck?
41 & 42
Which load center is located near Upper level port side engine room?
Which load center is located near Upper level stbd side engineroom?
Which load center is located near same space as LC21 & 22?
Which load center is located near HT office?
Which load center is located above deck berthing Stbd side?
What is the purpose of degaussing?
Reduces the ship's effect on the earth's magnetic field, therefore reducing possibility of detection by magnet sensitive ordnance equipment such as mines.
What is the function of degaussing type?
BLR is equipped with type Solid State magnetic (SSM) automatic degaussing equipment. This equipment consists of a control switchboard, a remote control unit, and a power supply for each of the degaussing coils.
What is the function of the RCU?
Provides status indicators and a heading switch for emergency manual operation from **pilot house**.
What is the function of the Control Switch board?
Contains operator controls, control circuits, and status indicators such as magnetic heading, and DC amp meters. Switchboard is located in the same space as LC 21/22/44 next to CCC office.
What is the function of the Power Supply Units?
Amplify control signals from the switchboard and provide DC current to its associated degaussing coil. There are four power supplies, also located in the same space as LC 21/22/44 next to CCC office.
What is the function of the M coil?
M (main) coil encircles the ship in a horizontal plane near the waterline. The M coil produces a magnetic filed that counteracts the ships vertical permanent and induced magnetism.
What is the function of the FP-QP coil?
Produces a magnetic field that counteracts the ships longitudinal permanent magnetism. Also provides some aid to the M-coil in counteracting the vertical induced magnetism. Split into 2 coils connected in series. FP encircles the fwd 1/3 and qp the aft 1/3 of the ship n the 2nd deck.
What is the function of the FI-QI coil?
Produces a magnetic field that counteracts the ships longitudinal induced magnetism. Field strength depends on ships heading and magnetic latitude. Split into 2 coils connected in series. FI encircles the fwd 1/3 and QI encircles aft of the ship on 2nd deck
What is the function of the A coil?
A coil (arthwartship) coil has loops in the vertical fore-and-aft planes. The A-coil produces a magnetic field that counteracts the ships arthwartship permanent and induced magnetism. Arthwartship induced magnetism changed when the ship changes heading, magnetism latitude, or rolls.
What is the function of the L coil?
L (longitudinal) coil is commonly used for minesweeping only
Which coils have to be manually operated?
Which coils operate automatically?
What are the normal and alternate power sources for degaussing?
Load Center 21
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