Reader David R. Wilkerson is incorrect when he says (Unicom, February 2011), “[A]irspace can have more that one designation, even under ICAO.” Firstly he mentions TRSA, which is not part of ICAO airspace designations. Instead, its a carryover from old U.S. airspace designations. Some TRSAs still exist today usually because traffic volumes are not sufficient to make them Class C airspace. Participation remains voluntary within them. Other airspace designations used in the U.S. are not 288
International Airspace
Reader David R. Wilkerson is incorrect when he says (Unicom, February 2011), "[A]irspace can have more that one designation, even under ICAO." Firstly he mentions TRSA, which is not part of ICAO airspace designations. Instead, its a carryover from old U.S. airspace designations. Some TRSAs still exist today usually because traffic volumes are not sufficient to make them Class C airspace. Participation remains voluntary within them. Other airspace designations used in the U.S. are not ICAO designations. These include MOA, MTR and restricted areas.
Key Takeaways:
- U.S. airspace designations like TRSA, MOA, and MTR are not part of ICAO designations, and Class D airspace converts to Class E (or G) when a tower is inactive, rather than existing simultaneously.
- When facing an engine failure over a challenging land area, a prepared water landing can be a safer alternative due to water's generally flat and unobstructed nature, often with potential observers.
- Straight-in approaches, currently often omitted from basic flight training, should be taught to better prepare private pilots for real-world ATC instructions and scenarios.
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