Unmanned Aircraft Advisory Circulars Advisory Circulars are issued to provide guidance to the industry on subjects related to procedures. ANR101 – Unmanned Aircraft OperationsToggle accordion Subject Notice. No Date Permits for Unmanned Aircraft (PDF, 214KB) AC 101-2-1(4) 23 December 2022 BVLOS Operations for Unmanned Aircraft (PDF, 315KB) AC 101-2-2 30 December 2019 Centralised Flight Management System (PDF, 158KB) AC 101-2A-1 4 April 2022 Approvals for Unmanned Aircraft Training (PDF, 373KB) AC 101-3-1(2) 20 October 2022 Unmanned Aircraft Pilot Licence (UAPL) (PDF, 262KB) AC 101-4-1(3) 1 November 2022 Registration of Unmanned Aircraft (PDF, 634 KB) AC 101-5-1(1) 23 December 2022 Cross Border Permit for Unmanned Aircraft Operations (PDF, 172KB) AC 101-2-3 21 November 2023 Unmanned Aircraft Operations Over Roads Within Visual Line of Sight (PDF, 219KB) AC 101-2-4 27 December 2023 Safety Information Bulletin Safety Information Bulletins aim to communicate safety-related information to all unmanned aircraft users in Singapore. Safety Information BulletinToggle accordion SIB (Year 2018) 11/18 CAAS SIB 2018-05 Operations of Unmanned Aircraft using DJI Battery TB 50 and TB55 (PDF, 482KB)