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RB-M > Coxswain > Flashcards

Coxswain Flashcards

1
Q

Reduction gears

A

MG5114SC Twin disc

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2
Q

Waterjets

A

Twin Kamewa FF3755 Waterjets

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3
Q

Detroit diesel electronic control (DDEC)

What does it do?

A

Monitors engine systems and regulates fuel injection

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4
Q

Engine display modules (EDM)

A

Oil pressure

Engine rpm

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5
Q

Where are all the engine stop switches?

A

Coxswain upper console
Engineering console
Engine room over the mufflers on each engine

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6
Q

Emergency fuel cutoffs

A

Under and behind coxswain seat

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7
Q

What positions can the gears be placed in?

MG5114SC twin disc marine gears

A

Engaged
Disengaged - no discharge
Backflush - reverses rotation of pump impeller and discharges through the Waterjet intake

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8
Q

Where are the head oil reservoir dipsticks at?

A

Inboard of the engines

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9
Q

What is the reduction ratio of the marine gear?

A

1.02 : 1

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10
Q

How much gear oil in the reservoir?

A

2.8 gallons

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11
Q

Gear oil temperature parameters…

A

130-185 degrees F

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12
Q

Gear oil pressure

A

Clutch engaged - 185-250 PSI

Disengaged - 15-45 PSI

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13
Q

If no power to clutch engage panel, how do you operate clutch?

A

Manually operated solenoids can be used to clutch to engage or backflush

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14
Q

How does the propulsion system work?

A

Water is drawn into the Waterjet through an intake grate mounted flush with the hull bottom. Suction is provided by the Waterjet pump with an impeller. Water is then discharged through the steering nozzle.

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15
Q

Where are the Waterjet inspection ports?

A

Lazarette; black with cylindrical extension to help prevent water from entering when removed.

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16
Q

Two separate raw water systems.

A

Primary: provides cooling for propulsion system, cooling engine coolant, fuel, engine combustion air, gear oil, and engine exhaust (and exhaust quieting)

Secondary: A/C system

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17
Q

Raw water system flow

A

Suction line from the sea chest (Laz) for each engine.

Raw water from sea chest passes through duplex strainer. Seawater pumps and heat exchangers mounted on engines. Heated seawater is then discharged through engine exhaust system where it cools the exhaust and discharged overboard.

*There is a valve to redirect heated water back to sea chest for operations in slush ice. Recirculating valves are below the grating at foot of Laz ladder.

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18
Q

Oil capacity of engine

A

43 quarts 15W40

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19
Q

Where does air enter the engine room from?

A

Two air intake grates located aft bulkhead of pilothouse. The is a fire stop damper designed to close when activating FM200.

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20
Q

How does fuel system work?

A

From tank to primary fuel filters located centerline aft of the engines

Selector valve isolates one of the filter elements to allow changing without interrupting engine operation

Fuel flows from primary filters through fuel pump to second engine mounted fuel filter on aft end of engines. You can prime the fuel with prime pump handle at the secondary filter.

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21
Q

How many proportioning valves located in Laz for steering system

A

5, located on hydraulic valve manifolds

Port bucket
Port interceptor

Steering

Stbd bucket
Stbd interceptor

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22
Q

Where is hydraulic fluid tank? Capacity?

A

Engine room, port side

Holds 9 gallons

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23
Q

Steering vector control unit location and purpose

A

Located stbd aft in aux space (black box)

Converts input signals from joysticks into steering and throttle commands to the engine and hydraulic steering systems

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24
Q

Where is the rollover switch located?

A

Aft bulkhead of aux space port of centerline, above the fuel tank

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25
Q

Backflush RPM limit

A

1200 RPM

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26
Q

Main engines

A

Twin Detroit diesel series 60 engines

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27
Q

What 6 things comprise the HVAC system?

A
  • machinery space ventilation
  • non machinery space ventilation
  • air conditioning
  • HVAC cooling water system
  • electric heating
  • window defrosters
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28
Q

When is the ventilation automatically secured to the engine room?

A

When the FM200 is activated

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29
Q

How does air flow through the engine room?

A

Intakes on the vents on either side of the aft cabin door, through the engine room, and out the vents on either side of the lazarette scuttle.

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30
Q

Aux space vent location

A

Port side just forward of rescue recess

Has a check valve that limits water entry in the event of a rollover

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31
Q

Aux space exhaust fan location and how it works

A

Starboard side aux space

Draws air in from vent valve and discharges it into engine room

32
Q

4 components of A/C system

A
  • A/C unit
  • A/C unit controller
  • A/C unit condensate drain
  • Pump relay panel
33
Q

How many a/c units

A

two self contained 27,000 BTU a/c units

One in the pilot house and one in the survivors compartment

34
Q

Water intake for A/C system location

A

Receives water from starboard side of sea chest

Includes simplex strainer

35
Q

HVAC cooling water pump location and how it works

A

Starboard of centerline in engine room, aft of the access assist steps

Provides cooling water to both HVAC units

36
Q

Number of heaters and their locations

A

4; 2 in pilot house and 2 in survivors compartment
The two in each compartment are 1500W electric standalone heater and a 3000W duct heater. They operate independently of each other.
The 3000W duct heaters are used when sea water temperatures are too cold.

37
Q

Electrical system components

A
  • auragen power system
  • batteries
  • battery controls
  • battery charger
  • AC power distribution
  • Shore power distribution
  • DC power distribution
  • DC-DC converters
  • exterior lighting
  • interior lighting
38
Q

Auragen system consists of what three things?

A
  • Auragen Viper G8500X IPS (induction power source)
  • ECU
  • ICS control panel (inverter charging system)
39
Q

What is the Auragen?

A

Induction power unit mounted at front of each engine.
Belt-driven through engine crank shaft
Provides distribution to the AC and DC systems

40
Q

Auragen kW rating

41
Q

What does the ECU do?

A

Receives power from the Auragen and converts it to DC voltage and once converted, provides a regulated 24 volt DC for battery charge and the DC power distribution system.

It also inverts the DC voltage to AC voltage when selected by the AC Power ON/OFF control switch on the ICS control panel

42
Q

ECU locations

A

Forward aux space outboard of batteries.

43
Q

Auragen control panel location

A

Engineer console

Has an on/off switch and four led indicators

44
Q

How many batteries are there?

A

Four in two separate battery banks
Located on forward bulkhead of Aux space
One battery bank for START and one for HOUSE.

45
Q

Where is the battery charger?

A

Aux space; forward bulkhead, starboard side

46
Q

How many volts are the batteries

A

12 volts each, connected in series to provide 24 VDC current to the DC power distribution bus.

47
Q

Where are the deicing valves (recirculating valves)?

A

Lazarette under the grate at the bottom of the ladder.

48
Q

Bilge Pump locations and GPM rating.

A 
1 in forepeak
1 in survivor's compartment
2 on each side of Aux space
1 in engine room
1 in Lazarette
Each are rated at 2000 GPH (33 GPM)
They are controlled at the engineer console and run off 24V DC
49
Q

Where are the 24 VDC to 12 VDC converters?

A

Starboard side of Aux Space

50
Q

Where is the 240V AC panel?

A

Port side panel; has two load buses, 120V AC each

51
Q

How many volts does the shore power system receive?

A 
120V AC (100 Amps)
BUT the shore power isolation transformer converts it to 240V AC for the AC power distribution system.
52
Q

Where is the 24V DC power distribution panel?

A

Starboard side panel; provides power to the onboard electronics

53
Q

What are the four sections of the 24V DC panel?

A

Vital Bus
Engine Bus
Non-Vital Bus
12V DC Main Panel

54
Q

How much candlepower is the searchlight?

55
Q

How many floodlights are there?

56
Q

What are the low level lights?

A

Small dim lights much like the amber lights on the 25.

57
Q

FM200 consists of what six components?

A
  • Nitrogen pilot cylinder
  • Pressure switch
  • Damper control valves (3)
  • Nitrogen time delay cylinder
  • FM-200 agent cylinder with a pressure operated head
  • Discharge nozzle
58
Q

How much agent is in the FM200 canister?

A

30 Lbs; changes from liquid to gas once released

59
Q

Two ways to activate FM200.

A

Pilot canister under coxswain seat or down in the Aux space at the FM200 canister itself (to bypass 30 second delay bottle)

60
Q

Where are the FM200 canister and 30 delay bottle located?

A

Forward port side Aux space

61
Q

What does the pressure switch (in the fire suppression system) do and how is it activated?

A

Shuts both engines down and secures the engine room exhaust fans.
Activated by the pilot cylinder or manually at the switch in the aux space.

62
Q

How do the damper control valves work?

A

Closes the three dampers to the engine room to secure ventilation.
Automatically actuated when FM200 is activated
OR
Manually when the rings are pulled on the valves themselves

63
Q

Fire extinguisher locations

A

2 in the pilot house behind each aft seat

2 in the survivor’s compartment, one forward and one starboard aft near the folding seats

64
Q

What are the P-6 standpipes on the Laz scuttle for?

A

Top is for engine room dewatering and bottom is for firefighting water (draws from sea chest)

65
Q

What are the bilge alarm float switches?

A

Detect presence of water in the space and sets off audible alarm when the “EXT ALARM ARM” switch is activated.

66
Q

Coxswain Responsibilities

A

Safety and conduct of crew and passengers
Safe navigation and operation of the boat
Completion of mission/sortie
Safeguarding life/property
Enforcement of applicable laws/regulations
Reporting ATON discrepancies

67
Q

Second Search/Multi Unit Search

A

Sector: Second = 30 degress to right
Multi = 90 degrees to left

Square: Multi = 45 degrees to right

68
Q

Firefighting policy

A

No firefighting unless directed by higher authority and fire marshall on scene.
Can SUPPRESS fire with available equipment if necessary to preserve life

69
Q

Statutory authority for SAR

A

14 USC 1: Shall develop, establish and maintain SAR facilities
*Not legally required to respond to SAR

70
Q

Three objectives for SAR

A
  • Minimize loss of life, personal injury, and property
  • Minimize search duration and risk to crew
  • Maintain worldwide leadership role in Maritime SAR
71
Q

What is in the forepeak?

A 
6 - 60' Lines (2 3/4" DBN)
2 - 30' Lines (2 3/4" DBN)
2 - 100' heaving line bags
1 - 14' 6" skiff hook line
300' Anchor Line (2 3/4" DBN)
Drogue (with 200' 1.5" DBN)
72
Q

What is in the Survivor’s Compartment?

A 
5 - SAR Vests
Pyro box (6 M127A1s)
Stokes Litter
DC Kit
Spare Parts Kit
M240 Mount
Portable Searchlight
73
Q

Survivor’s Compartment STBD Cabinets

A 
Gunner restraint harness
Hearing protection
2 - Wool blankets
Emergency blankets
2 - Pillows
Portable air horn
Rescue swimmer harness
First aid kit
Personnel retrieval strap
P-6 firefighting hose
74
Q

What is in the head?

A 
5 Adult Type I PFDs
2 Child Type I PFDs
4 - Boat crew safety belts
Grounding wand
Towing kit (Pelican Case)
75
Q

What is in the Towing Pelican Case in the head?

A

1 1/4” de-anchoring shackle
Nylite shackle
7 LB Grapnel hook

76
Q

Main deck equipment

A 
2 - 30" ring buoy with 75' line bag
2 - 100' heaving lines
2 - boat hooks on either side of cabin
4 - fenders
Knife on sheath on STBD side
P-6 Pump
600' Tow line (2 3/4" DBN)
77
Q

What is in the Aux Space?

A 
Two battery banks with 2 batteries each
AIS
FM200 canister
30-second delay bottle
ECUs
Vector control
Fuel tank
Battery Charger
Air Compressor

RB-M (3 decks)

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