Final answer:
IFR and CVFR below 18000ft cruising altitude is called "VFR on top."
Step-by-step explanation:
IFR stands for Instrument Flight Rules, and CVFR stands for Controlled Visual Flight Rules. When flying below 18,000 feet cruising altitude, the combination of IFR and CVFR is commonly referred to as "VFR on top."
VFR on top is a flight condition where an aircraft operates under Visual Flight Rules (VFR) while maintaining clearance and communication with air traffic control (ATC) in accordance with Instrument Flight Rules (IFR). This means that the aircraft is flying visually, but also following specific IFR procedures and maintaining communication with ATC.
Here's a breakdown of the key points:
1. VFR on top:
- VFR on top is a concept that allows pilots to operate in VFR conditions while being separated from IFR traffic and receiving IFR services from ATC.
- It is typically used when weather conditions are suitable for VFR flight below 18,000 feet, but there may be IFR traffic or airspace restrictions in the area.
- Pilots must request and obtain clearance from ATC to fly VFR on top and follow any specific instructions provided.
2. IFR component:
- The IFR component of VFR on top means that the pilot must comply with IFR rules and procedures, including filing a flight plan and maintaining communication with ATC.
- The aircraft's instruments are used to navigate and maintain separation from other IFR traffic, even though the pilot is visually referencing the outside environment.
3. CVFR component:
- The CVFR component of VFR on top refers to the visual reference and navigation the pilot uses during the flight.
- While flying CVFR, the pilot relies on visual cues such as ground references, landmarks, and other visual aids to maintain situational awareness.
In summary, when flying below 18,000 feet cruising altitude, the combination of IFR and CVFR is commonly known as "VFR on top." It allows pilots to operate under VFR conditions while following IFR procedures and maintaining communication with ATC.
Your question is incomplete, but most probably the full question was:
IFR and CVFR below 18000ft cruising altitude is called...