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, MTR, and restricted areas are not ICAO designations, and Class D airspace reverts to Class E (or G) when a part-time tower is closed, not coexisting simultaneously.
- For engine failures, a prepared water landing can be a safer and preferred option over a difficult land landing, offering flat, unobstructed surfaces and potential for rescue.
- Straight-in approaches should be included in basic flight training, as many pilots are not comfortable with them if only taught standard pattern approaches.
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