3. Dubai Enhanced Wake Turbulence Separation (eWTS)

3.1 General

Airports within the Dubai CTA utilise a revised system of wake turbulence categories to that defined by ICAO to allow for more efficient separation for arriving and departing traffic, increasing airport capacity.

Known as Enhanced Wake Turbulence Separation (eWTS), the re-categorisation of aircraft is based primarily on maximum take-off mass, wingspan, and approach speed. eWTS splits aircraft into seven categories (A to G), as opposed to the four categories defined in ICAO Doc 4444 (See Section 7).

The use of eWTS allows more efficient use of airspace, reducing separation depending on the leading and following aircraft, maintaining separation in some instances, and increasing separation for the smallest trailing aircraft.

eWTS encompasses both distance-based separation for arriving aircraft as well as time-based separation for departing aircraft and is applied at Dubai Intl (OMDB), Al Maktoum Intl (OMDW) and Sharjah Intl (OMSJ).

3.2 Departures (time-based separation)

3.2.1 Successive full-length departures

Follower	A	B	C	D	E	F	G
Leader
A	*	100s 1m40s	120s 2m	140s 2m20s	160s 2m40s	160s 2m40s	180s 3m
B	*	*	*	100s 1m40s	120s 2m	120s 2m	140s 2m20s
C	*	*	*	80s 1m20s	100s 1m40s	100s 1m40s	120s 2m
D	*	*	*	*	*	*	120s 2m
E	*	*	*	*	*	*	100s 1m40s
F	*	*	*	*	*	*	*
G	*	*	*	*	*	*	*
* No wake turbulence separation requirement

Table 3-1: eWTS departure separation (full-length)

3.2.2 Departure from an intermediate point following departure from full-length

Follower	A	B	C	D	E	F	G
Leader
A	*	160s 2m40s	180s 3m	200s 3m20s	220s 3m40s	220s 3m40s	240s 4min
B	*	*	*	160s 2m40s	180s 3m	180s 3m	200s 3m20s
C	*	*	*	140s 2m20s	160s 2m40s	160s 2m40s	180s 3min
D	*	*	*	*	*	*	180s 3min
E	*	*	*	*	*	*	160s 2m40s
F	*	*	*	*	*	*	*
G	*	*	*	*	*	*	*
* No wake turbulence separation requirement

Table 3-2: eWTS departure separation (intermediate point following full-length)

3.3 Arrivals (distance-based separation)

3.3.1 Aircraft on the same localizer course

Follower	A	B	C	D	E	F	G
Leader
A	*	4 NM	5 NM	5 NM	6 NM	6 NM	8 NM
B	*	3 NM	4 NM	4 NM	5 NM	5 NM	7 NM
C	*	*	*	3 NM	3.5 NM	3.5 NM	6 NM
D	*	*	*	*	*	*	4 NM
E	*	*	*	*	*	*	4 NM
F	*	*	*	*	*	*	*
G	*	*	*	*	*	*	*
* No wake turbulence separation requirement

Table 3-3: eWTS arrival separation for aircraft on the same localiser course