Singapore legislation
Regulation 16
of Air Navigation (98 — Special Operations) Regulations 2018
Regulation 16
Equipment requirements for RVSM operations
A Singapore operator with a special operations approval to conduct RVSM operations must equip every aeroplane used for such operations with navigation equipment capable of —
indicating to the flight crew the flight level being flown;
automatically maintaining a selected flight level;
providing an alert to the flight crew when the aeroplane deviates from the selected flight level with a deviation exceeding the threshold of 90 m (300 ft) above or below the selected flight level; and
automatically reporting to the flight crew the pressure‑altitude if the pressure‑altitude is not automatically reported by the pressure altimeters required for the aeroplane.