2.1.1.1 The table of units of measurement shown below will be used by aeronautical stations within Kuala Lumpur and Kota Kinabalu FIRs for air and ground operations.

For Measurement of	Units used
Distance used in navigation, position reporting, etc. - generally in excess of 2 to 3 nautical miles	Nautical Miles and Tenths
Relatively short distances such as those relating to aerodromes (e.g. runway lengths)	Metres
Altitudes, elevations and heights	Feet
Horizontal speed including wind speed	Knots
Vertical speed	Feet per minute
Wind direction for landing and taking-off	Degrees Magnetic
Wind direction except for landing and taking-off	Degrees True
Visibility including runway visual range	Kilometres or Metres
Altimeter setting	Hectopascal
Temperature	Degrees Celsius (Centigrade)
Weight	Metric tonnes or Kilograms
Time	Hours and Minutes, the day of 24 hours beginning at midnight UTC

2.1.1.2 The prefixes and symbols listed in table shown below shall be used to form names and symbols of the decimal multiples and sub-multiples of SI units

Table: SI unit prefixes

Multiplication Factor	Prefix	Symbol
1000 000 000 000 000 000 = 1018	exa	E
1 000 000 000 000 000 = 10 15	peta	P
1 000 000 000 000 = 10 12	tera	T
1 000 000 000 = 10 9	giga	G
1 000 000 = 10 6	mega	M
1 000 =10 3	kilo	k
100 = 10 2	hecto	h
10 = 10 1	deca	da
0.1 = 10-1	deci	d
0.01 = 10 -2	centi	c
0.001 = 10 -3	milli	m
0.000 001 = 10-6	micro	μ
0.000 000 001 = 10 -9	nano	n
0.000 000 000 001 = 10 -12	pico	p
0.000 000 000 000 001 = 10 -15	femto	f
0.000 000 000 000 000 001 = 10 -18	atto	a

2.1.2.1 Coordinated Universal Time (UTC) is used in air traffic and communications services and in documents published by Aeronautical Information Service. Local time is 8 hours ahead of UTC in Malaysia.

2.1.2.2 In reporting time, the nearest full minute is used. Time checks to aircraft are accurate to within 30 seconds.

2.1.3.1 The published geographical coordinates in the Kuala Lumpur FIR and Kota Kinabalu FIR indicating latitude and longitude are expressed in terms of the World Geodetic System - 1984 (WGS-84) geodetic reference datum.

2.1.4.1 The nationality mark for aircraft registered in Malaysia is the figure 9 followed by the letter M. The nationality mark is followed by a hyphen and a registration mark consisting of three letters.

Example: 9M-MAS.

2.1.5.1 The following is a list of national public holidays in Malaysia for 2023.

DATE	PUBLIC HOLIDAY
01 January 2023	New Year’s Day
22 & 23 January 2023	Chinese New Year
22 & 23 April 2023	Eid Al-Fitri
01 May 2023	Labour Day
04 May 2023	Wesak Day
05 June 2023	King’s Birthday
29 June 2023	Eid Al-Adha
19 July 2023	Hijri New Year’s Day
31 August 2023	National Day
16 September 2023	Malaysia Day
28 September 2023	Prophet Muhammad’s Birthday
12 November 2023	Deepavali Day
25 December 2023	Christmas