Definition
Altitudes shown on an instrument approach procedure chart that are recommended for descent planning but are not mandatory minimums or required crossing altitudes. They are depicted in the profile view of approach plates, typically shown in italics or with an asterisk, and are provided to help the pilot maintain a stable descent profile but do not carry the regulatory weight of published minimum altitudes.
Plain English
Suggested altitudes printed on an approach chart to help you fly a smooth descent. They are guidance, not rules — you are not required to be exactly at them, but they help you stay on a sensible path down.
Context Anchor
Seen on the profile view of an instrument approach chart, especially when checking descent planning from one fix to the next.
Derivation
From Latin advisare, 'to consider' or 'give counsel.' An advisory altitude is one that advises — it offers recommended guidance rather than imposing a requirement.
Why Pilots Care
Distinguishing advisory from mandatory altitudes supports safe descent planning and regulatory compliance during approaches.
Intuition Check
Do not read advisory as required. Advisory altitudes suggest a good descent path; required or minimum altitudes are the ones you must comply with.
Example Sentence 1
On the approach briefing, the pilot noted the advisory altitude at the final approach fix as a target for a stabilized descent.
Example Sentence 2
Although the chart displayed an advisory altitude at the final approach fix, the pilot remained at the published segment altitude until cleared lower.