Parallel Operations

Question 1

2 Types of Approaches

Answer 1

Independent and Dependent.

Determined by Radar separation

Question 2

All aircraft must have what equipment?

Answer 2

ILS/MLS

Question 3

Independent Parallel Approach (Mode 1)

Answer 3

Intercept angle - 30°

S&L 1nm prior to LOC intercept

S&L 2nm prior to G/S interception

No less than 1035m between runway centrelines

Missed Approach tracks must diverge by 30°

Question 4

Dependent Parallel Approach (Mode 2)

Answer 4

Minimum 3NM between 2 A/C on the same localiser

Minimum 2nm between 2 A/C on adjacent localisers. (Parallel app)

30° intercept angle

1NM S&L prior to LOC

2NM S&L prior to G/S intercept.

Centreline - 915 m (between two runways)

Question 5

Simultaneous Instrument Departures -Mode 3

Answer 5

Not less than 760m between runway centrelines.

Aircraft to be identified by 1nm/ 2km from DER

Trucks must diverge by 15°

Question 6

Segregated Departures & Arrivals - Mode 4

Answer 6

Max intercept angle 45° to the localiser

• 1NM LOCALISER
• 2NM G/S

Not less than 760m, can be staggered by 150m to minimum 300m.

Question 7

Normal Operating Zone

Answer 7

Applies to Mode 1 only

Fly within half scale deflection to maintain clearance

Extends from threshold to where A/C joins centreline

Question 8

Non Transgression Zone (NTZ)

Answer 8

NTZ extends from runway threshold to 1000’ separation point.

Think like from LHR to LCY area.