ATS AIRSPACE CLASSIFICATION

ENR 1.4 ATS AIRSPACE CLASSIFICATION

1 INTRODUCTION

1.1 The airspace in the Singapore FIR has been classified in accordance with Appendix 4 of ICAO Annex 11.

2 AIRSPACE CLASSIFICATION

2.1 Within the Singapore FIR, the airspace is divided into 5 classes as shown in the table below:

AIRSPACE CLASSIFICATION IN THE SINGAPORE FIR
Airspace		Flight Levels	Classification
Controlled Airspace		FL150 to FL460	A
Controlled Airspace		Surface to FL150	B
Controlled Airspace more than 100NM seaward from the shoreline		Lower Limit to FL460	A
Control Zones (CTRs)	CHANGI CTR	Surface to Upper Limit	C
	PAYA LEBAR CTR		D
	SELETAR CTR		C
ATZs		Surface to Upper Limit	D
Uncontrolled Airspace			G*

* Aircraft operating in Light Aircraft Training Areas A, B and C (refer to page ENR 5.2-1) are required to have continuous two-way communications with the appropriate ATS authority.