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 UA Operations (PDF, 242KB) AC 101-2-1(3) 7 February 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, 372KB) AC 101-3-1(1) 1 October 2021 Unmanned Aircraft Pilot Licence (UAPL) (PDF, 292KB) AC 101-4-1(2) 15 November 2021 Registration of Unmanned Aircraft (PDF, 289KB) AC 101-5-1 30 December 2019 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)