Minimum Safe Flight Altitudes According to Circular 19/2017/TT-BGTVT

22:02, 11/07/2024

Circular 19/2017/TT-BGTVT stipulating the management and assurance of flight operations was issued on June 6, 2017. This Circular specifically regulates the minimum safe flight altitude as follows:

1. The minimum safe flight altitude is regulated and published by the Civil Aviation Authority of Vietnam for each ATS route, RNAV/RNP route, and controlled airspace.

2. The minimum safe flight altitude on the route is calculated based on the highest point of the terrain and artificial obstacles within a 25 km wide strip on each side of the ATS route axis, within the protection strip as prescribed for each type of RNAV/RNP route as follows:

- At least 300 m for plains, midlands, and water surfaces;- At least 600 m for mountainous terrain.

3. In airport airspace, the minimum safe flight altitude must be regulated for the sectors of each instrument approach procedure. The minimum safe flight altitude in each sector is at least 300 m above the highest point of the terrain and artificial obstacles within 46 km from the navigation aid station of the instrument approach procedure, including a 9 km buffer zone surrounding each sector. For high mountainous terrain, this altitude is regulated to be at least 600 m.

4. If the altitude difference between sectors is less than 100 m, a common minimum safe flight altitude can be prescribed for the sectors.

5. For two flight procedures using two navigation aids placed no more than 9 km apart, the minimum safe flight altitude for each sector is selected as the higher value.

See more: Circular 19/2017/TT-BGTVT effective from August 1, 2017.

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