Definition
FAA airspace and approach classifications used to describe approach categories for helicopters (Category H) and tiltrotor aircraft or other specific operations (Category I), based on aircraft approach speed and operating characteristics. These categories determine which instrument approach minimums and procedures apply to a given aircraft on a published approach chart.
Plain English
Two of the letter-based groups the FAA uses to sort aircraft when flying instrument approaches. Category H covers helicopters. Category I covers a separate, narrower group with its own approach rules. The category an aircraft falls into decides which set of approach minimums on the chart that aircraft must use.
Context Anchor
Seen in discussions of instrument approach categories and on approach information where the correct aircraft category determines which line of altitude and visibility requirements applies.
Derivation
Category means a class or group. In this use, H points to helicopters, and I is the FAA category label used for powered-lift aircraft. The letters are not describing runway categories or instrument landing system categories.
Why Pilots Care
Knowing which category applies determines the minimums, speeds, and equipment requirements a pilot must meet for safe and legal operations.
Intuition Check
Do not read Category I here as an ILS Category I approach. In this term, Category I means the aircraft approach category for powered-lift aircraft.
Example Sentence 1
Because we were flying the helicopter, we used the Category H minimums on the ILS approach plate rather than the Category A line.
Example Sentence 2
During preflight planning the pilot confirmed the airplane met Category H and I criteria before accepting the clearance.