Skip to main content
A Singapore Government Agency Website How to identify
Official website links end with .gov.sg
Secure websites use HTTPS
Look for a lock () or https:// as an added precaution. Share sensitive information only on official, secure websites.
Scam Alert

Government officials will NEVER ask you to transfer money or disclose bank log-in details over a phone call. Call the 24/7 ScamShield Helpline at 1799 if you are unsure that something is a scam.

Civil Aviation Authority of Singapore

Air navigation services (past version)

Last updated 12 May 2026

Regulatory Requirement (past version)


Document

Version / Revision

Date

Manual of Standards (172 – Air Traffic Services) 2024 (opens in new tab)

1 

28 November 2024
(Superceded by Revision 2)

Manual of Standards (175 – Aeronautical Information Services) 2024 (opens in new tab)

1 

28 November 2024 
(Superceded by Revision 2) 

Manual of Standards (MOS) - Meteorological Service For International Air Navigation Volume I (opens in new tab)

5.0 

26 October 2020 (Replaced by MOS-174 from 27 November 2025)

Manual of Standards (MOS) - Meteorological Service For International Air Navigation Volume II (opens in new tab)

5.0

26 October 2020
(Replaced by MOS-174 from 27 November 2025)

Advisory Circular (past version)


Document

Notice no.

Date

Nil