ENR 1.6 - UK SSR Code Allocation Plan

Question 1

0000

Answer 1

SSR data unreliable

Question 2

0001

Answer 2

Height monitoring unit

Question 3

0002

Answer 3

Ground transponder testing

Question 4

0007

Answer 4

Off-shore Safety Area conspicuity

Question 5

0020

Answer 5

Air ambulance helicopter emergency medivac

Question 6

0021

Answer 6

Fixed wing aircraft receiving service from a ship

Question 7

0022

Answer 7

Helicopter receiving service from a ship

Question 8

0023

Answer 8

Aircraft engaged in actual SAR operations

Question 9

0024

Answer 9

Radar flight evalutation/calibration

Question 10

0030

Answer 10

FIR lost

Question 11

0032

Answer 11

Aircraft engaged in police air support operations

Question 12

0033

Answer 12

Aircraft paradropping

Question 13

0036

Answer 13

Helicopter pipeline/powerline inspection flights

Question 14

0037

Answer 14

Royal flights - helicopters

Question 15

0040

Answer 15

Civil helicopters north sea

Question 16

2000

Answer 16

Aircraft from a non SSR environment, or Mode S aircraft on the aerodrome under tow or parked prior to selecting OFF or STDBY

Question 17

3701 - 3747

Answer 17

RAF Lossiemouth (deemed validated and verified)

Question 18

7000

Answer 18

General conspicuity code

Question 19

7001

Answer 19

Military fixed wing low level conspicuity/climb out

Question 20

7002

Answer 20

Danger Areas general

Question 21

7003

Answer 21

Red Arrows transit/display

Question 22

7004

Answer 22

Conspicuity aerobatics and display

Question 23

7005

Answer 23

High energy manoeuvres

Question 24

7006

Answer 24

Autonomous operations within TRA

Question 25

7007

Answer 25

Open Skies observation aircraft

Question 26

7010

Answer 26

Operating in aerodrome Traffic Pattern

Question 27

7200

Answer 27

RN ships

Question 28

7400

Answer 28

MPA/DEFRA/Fishery Protection/METMAN

Question 29

7500

Answer 29

Special purpose code - Hijacking

Question 30

7600

Answer 30

Special purpose code - Radio failure

Question 31

7700

Answer 31

Special purpose code - Emergency

Question 32

7776 - 7777

Answer 32

SSR monitors

Question 33

2621 - 2630

Answer 33

Aberdeen (Sumburgh Approach)

Question 34

3601 - 3632

Answer 34

Scottish ATSOCA purposes