(3) The rate of climb or descent, when necessary.

(4)
Detailed instructions regarding departure or approach Levels.

d.
ADHERENCE TO FLIGHT PLAN - Since all Air Traffic Control clearances are predicated on known traffic, adherence to the flight plan as cleared is mandatory

7-19 EMERGENCY PROCEDURES - States of emergency are internationally classified as being of two standards:
a.
DISTRESS - The aircraft is threatened by serious and imminent danger and is in need of immediate assistance.

b.
URGENCY - The calling station has a very urgent message to transmit concerning the safety of an aircraft, or some person on board or within sight.

NOTE: Standard International emergency procedures and individual country exceptions to standard procedures can be found in the Flight Information Handbook (FIH).
7-20 DIMENSIONAL UNITS - Amendment 13 to ICAO Annex 5 introduced a standardized system of units of
measurement based on the International System of Units (SI) and certain non-SI units considered necessary to meet the specialized requirements of international civil aviation. This amendment
became effective on the 26th of November 1981. The Table A below gives the units of measurement more widely used by aircrews.
TABLE A: UNITS OF MEASUREMENT 
MEASUREMENT OF  PRIMARY SI UNIT  NON-SI ALTERNATIVE UNIT 
Distance used in navigation, position reporting etc -  KILOMETERS (km)  .NAUTICAL MILES (NM) 
generally in excess of 4000 Meters. 
Relatively short distances such as those relating to  METERS (m)  FEET (ft) 
aerodromes (e.g. runway lengths) 
Altitudes, elevations and heights.  METERS (m)  FEET (ft) 
Horizontal speed including wind speed.  KILOMETERS/PER HOUR (km/h)  KNOTS (kt) 
Vertical Speed.  METERS PER SECOND (m/s)  FEET PER MINUTE (ft/min) 
Wind direction for landing and taking off.  DEGREES MAGNETIC (°m)  DEGREES MAGNETIC (°m) 
Wind direction except for landing and taking off.  DEGREES TRUE (°T)  DEGREES TRUE (°T) 
Visibility (over 5 kilometers).  KILOMETERS (km)  KILOMETERS (km) 
Visibility (Less than 5 kilometers) including runway  METERS (m)  METERS (m) 
visual range. 
Altimeter setting.  .HECTO PASCALS (hPa)  MILLIBARS (mb) 
Temperature.  DEGREES CELSIUS (°C)  DEGREES CELSIUS (°C) 
(CENTIGRADE)  (CENTIGRADE) 
Weight.  METRIC TONS (t)  METRIC TONS (t) 
or KILOGRAMS (kg)  or KILOGRAMS (kg) 
Time.  HOURS & MINUTES  HOURS & MINUTES 
The day of 24 hrs beginning at  The day of 24 hrs beginning at 
midnight UTC  midnight UTC 
Cloud altitude and height.  METERS (m)  FEET (ft) 
.1 International nautical mile - 1,852 meters 
.1 Millibar = 100 Pascals = (hPa) 

NOTES:

1.
A list of Member States with differences from the Table A units of measurement will be published when available.

2.
The units listed under "NON-SI ALTERNATIVE UNIT" are those that originally appeared under "Units in Blue Table".

3. As an interim measure, until Member States have declared their differences from Table A, the old units of measurement are shown in Table B as follows:
TABLE B: UNITS OF MEASUREMENT 
MEASUREMENT OF  UNITS ICAO TABLE  UNITS IN BLUE TABLE 
Distance used in navigation, position reporting etc -  .NAUTICAL MILES (NM)  .NAUTICAL MILES (NM) 
generally in excess of 2 to 3 nautical miles.  and TENTHS  and TENTHS 
Relatively short distances such as those relating to  METERS (m)  METERS (m) 
　
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