Hydraulic Bursts

Question 1

Initial actions of the Attack party leader ?

Answer 1

• perform a fire risk assessment
• Report to DCHQ the location and any actions carried out to isolate the burst.
• Report any other hazards caused by the burst

Question 2

What needs to be done before using a dry powder extinguisher ? And why ?

Answer 2

• Don EBS prior to operating dry powder.
• Dry powder can damage human respiratory system.

Question 3

Initial actions if you find a hydraulic burst ?

Answer 3

• raise the alarm by quickest means possible.
• Don an EBS mask
• Attempt to contain the mist with dry powder extinguisher.
• Attempt to shut the supply vv to the burst.

Question 4

Indications of a hydraulic burst ?

Answer 4

• fine high pressured mist or pool of fluid.
• Loud hissing noise that reduces as replenishment tank empties.
• Smell is not easily identifiable due to atmospheric mix of oils onboard.
• Slightly tangy taste if you were to walk into mist.
• Rep tank level and plant pressure indications on PMS start to drop.

Question 5

If snorting or venting in event of a hydraulic burst the SCOOW will ?

Answer 5

Make a pipe stating “Stop snorting/ ventilating.”

Question 6

When the SCOOW pipes “stop snorting and ventilating” it is an order for the ships company to ?

Answer 6

Shut all hull vvs, lower masts and stop any trimming ops.

This allows all systems to be operated and put into normal state mode prior to hydraulic isolations being made.

Question 7

Initial actions of the SCOOW will be to order the planesman ?

Answer 7

A depth to keep- to minimise planes and rudder movements to reduce hydraulic use.

Question 8

Another initial action of the SCOOW in a hydraulic burst is to inform MR when rudder and planes are ?

Answer 8

At minimum angles - MR to isolate system from plant using fire isolation vvs

Question 9

SCOOW initial actions in a hydraulic burst is to order the SCCO to open ?

Answer 9

WS 623 supply to the aft centre fed hose reels, ensure low gain mode has been selected.

Question 10

In a loss of hydraulics what systems may need to be operated by hand ?

Answer 10

Hydroplanes and steering

Weapon handling

Masts

Mast shutters

System vvs

Blow vvs

Question 11

How many actuators does each of the aft control surfaces have ?

Answer 11

Port aft plane : one actuator

Stbd aft plane : one actuator

Rudder : two actuators (work in tandem)

Question 12

How many actuators does each the fwd control surfaces have ?

Answer 12

Fwd planes : one actuator for both port & stbd sides.

Question 13

What is the preferred normal mode for submarine control ?

Answer 13

Auto mode.

Question 14

What are the three gain modes of operation in the PMS control ?

Answer 14

High gain

Normal gain

Low gain

Question 15

What situation would high gain be used in ?

Answer 15

Used in emergency situations when there has been a control surface failure

Question 16

What situation is normal gain mode used ?

Answer 16

Used for all normal operations

Question 17

What situation would low gain mode be used in ?

Answer 17

Used when stealth is required - during quiet ops or when a reduction in hydraulic load is required (eg. Hydraulic burst)

Question 18

To adopt manual control the SCOOW orders ?

Answer 18

“Planes in manual” or “rudder to manual”

Question 19

Once the SCOOW has ordered to adopt manual control what does the planesman do ?

What about if urgent control is required ?

Answer 19

Presses the manual override buttons and reports that he has control in manual.

And he presses the emergency override button on the joystick if urgent control is required.

Question 20

Rate control is ordered when ?

Answer 20

Control surfaces fail to respond in auto/ manual control.

Or

There is any PMS failure.

Question 21

To select rate control the planesman has to ?

Answer 21

Select the hydraulic plant on the hydraulic control panel then press the rate control IPB on the panel for the effected control surface.

Question 22

How does the operator test the control surface ?

Answer 22

By attempting to move it.