Safety Distances

Question 1

Radar- Safety distances

Answer 1

Personnel-78m
Fuelling/Oxygen- 200m

Question 2

Doppler- When does it transmit and distances

Answer 2

When electrical supply is set to on & weight is off wheels, DVS will transmit.
Personnel-1m
Fuelling-200m

Question 3

SIFF- When it transmits and safety distance.

Answer 3

Transmits during testing or when under interrogation.
0.7m from SIFF antennas

Question 4

I-Band- When it transmits and safety distance.

Answer 4

Transmits during testing or when under interrogation.
Personnel - 0.2m

Question 5

RAD ALT, when it transmits and safety distances.

Answer 5

When power supply is set to ‘ON’, it will transmit.
Personnel- 0.5m
Fuelling- 200m

Question 6

V/UHF- Safety distances & precautions

Answer 6

Do not touch aerials.
Personnel- 0.75m
Weapons/ fuel- 10m

Question 7

HF- Safety distances and precautions when testing.

Answer 7

Personnel- 2.5m
Weapons/ fuelling- 40m
Transmits at full power during testing.

Question 8

Anti-Col Lights- 2 plus 2 rule and cautions with UV filter.

Answer 8

Don’t look at light at a distance of less than 2m.
Ensure power is removed for at least 2 minutes before starting maintenance.
Allow to cool before starting maintenance.
Don’t switch on light without the UV filter on.

Question 9

HEIU- General precautions

Answer 9

Isolate the system.
Wait a minimum of 1 minute for electrical energy to dissipate.
Disconnect the LT lead before the HT lead.
Reconnect in reverse.

Question 10

Fire bottles- What gas is used and actions to be taken.

Answer 10

Halon gas (which is toxic)
Don’t inhale if operated.
Fit protective blanks when handling.

Question 11

Hand held fire extinguishers- What gas is used and actions to be taken.

Answer 11

BCF (Bromo-chloro-difluoro-methane, which removes oxygen form the atmosphere)
Ventilate the cabin and cockpit when an extinguisher has been operated.

Question 12

Beacon Airfoil Unit- Precautions

Answer 12

Do not go into area 1.2m around BAU.
If working in the area, the BAU must be disconnected.
Care must be taken when working on the BAU as release, shock or damage can cause it to transmit.
Do not press the EAS deploy button in the cockpit (as there is continuous standby power supplies to the system).
Ensure the manual release handle wire locking is attached correctly.

Question 13

Fire and Flotation CCT breakers- When and why are they pulled.

Answer 13

Start of an AFS.
To prevent inadvertent operation.

Question 14

Systems containing EIED’S and precautions when handling.

Answer 14

Fire bottle x8, flotation system x4, ADS winch x1, rescue hoist x1 and BARU x1.
Don’t remove from container unless you are ready to install it.
Put into container immediately after removing from the system.
Don’t touch the terminals, contacts or cables
Ensure you are not in the danger area for radio/ radar transmission.
Shorting plug should not be removed until immediately before being connected.
Carry out no-volts test prior to connection.
Wear correct PPE (goggles, hearing protectors and electro static discharge ground straps)

Question 15

Implications of Crash Switch CCT breaker if popped and action to be taken.

Answer 15

Don’t push back in as it may cause fire system to go off.
Inform a supervisor.

Question 16

EO/IR- Safety distance, undemanded movement and precautions.

Answer 16

1.13m from FMV antenna.
Turret may rotate for 15seconds during power up.
Ensure no body part or loose clothing becomes trapped.
Isolate the power to the system to prevent undemanded movement during maintenance.
Ensure you don’t look directly into the laser lens on the turret.
The turret is a heavy lifting hazard, be careful when moving.
It contains thorium chloride and beryllium copper which are dangerous materials.

Question 17

CMWS- Precautions

Answer 17

EOMS optical window contains Nickel Sulphate (dangerous material if damaged).

Question 18

CMDS- Safety pins and precautions

Answer 18

Ensure safety pins are fitted (rear edge of each sponson).
Ensure the Master Armament Safety Switch is set to Safe.
Ensure the late arm switch is set to Safe (flap lowered).
Ensure the aircraft is in designated arming area, pointing in safe direction.
Avoid dispenser line of fire when approaching aircraft.
DCDU display may indicate zero but misfired flares may still be in the magazine.

Question 19

Flare handling precautions.

Answer 19

Handle in well ventilated area.
Always point base of flare in a safe direction.
Discharge body static.
Don’t strike the impulse cartridge.
Don’t remove the squib from misfired flare.

Question 20

IRCM- Safety distance and precautions.

Answer 20

Personnel 4m.
After system shut down - don’t touch the transmitters for a minimum of 55 minutes (they get very hot).
The system requires very high voltages (4000V/800A in EMI filter & 1500V in transmitters)- Lethal.
IR source lamp contains caesium (which can cause serious burns, spontaneously ignites in contact with moisture can explode in contact with oxidizing materials)

Question 21

Traffic Advisory System- Safety distance

Answer 21

Personnel- 0.4m

Question 22

AC/DC Lethal Voltages-

Answer 22

30V AC
50V DC