Singapore legislation
Regulation 89
of Air Navigation (135 — Commercial Air Transport by Helicopters and Small Aeroplanes) Regulations 2018
Regulation 89
Aircraft operating under VFR
An AOC holder must ensure that a relevant aircraft that is to be flown in accordance with the Visual Flight Rules is equipped with a means of measuring and displaying —
(a)
magnetic heading;
(b)
the time in hours, minutes and seconds;
(c)
barometric altitude;
(d)
indicated airspeed;
(e)
mach number, if the speed limitation prescribed by the aircraft flight manual is expressed in terms of mach number; and
(f)
turn direction and rate of turn, if the aircraft is a helicopter.