Intermediate Supplementary Flight Level

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Link Semantic Value
Term Intermediate Supplementary Flight Level
Status


Mandatory for


Contexts


Categories
Synonyms


Related entries

intermediate flight level (IFL)

Broader term

flight level

Narrower term


Abbreviation

ISL

Definition

If an aircraft cannot reach its IFL on entry of the intermediate sector, its ISL will be set by the Auto so that the aircraft's altitude is guaranteed to be between its ISL and IFL when flying through the intermediate sector.

Definition Source

EUROCONTROL SASS-C Glossary

Note