Ads
related to: visual visibility requirements- Jama Software® Pricing
Jama Connect®: Minimize Risks.
Get a Free Price Quote Today!
- Risk Management
Analyze risk alongside requirements
to ease the path to compliance.
- Free 30 Day Trial
Start Executing On Your Projects
Today - Free 30 Day Trial!
- Jama Connect®
Increase Your Speed and Efficiency.
Unleash Performance.
- Jama Software® Pricing
Search results
Results From The WOW.Com Content Network
VFR / VMC visibility requirements in the US. In aviation, visual meteorological conditions (VMC) is an aviation flight category in which visual flight rules (VFR) flight is permitted—that is, conditions in which pilots have sufficient visibility to fly the aircraft maintaining visual separation from terrain and other aircraft.
Under visual meteorological conditions, the minimum visual range, distance from clouds, or cloud clearance requirements to be maintained above ground vary by jurisdiction, and may also vary according to the airspace in which the aircraft is operating. [4] In some countries, VFR flight is permitted at night, and is known as night VFR.
With good visibility, pilots can determine the aircraft attitude by utilising visual cues from outside the aircraft, most significantly the horizon.Without such external visual cues, pilots may be subject to sensory illusions and must use an alternative reference for the attitude, which is usually provided by gyroscopically-driven instruments such as the attitude indicator ("artificial horizon").
Flight under SVFR is only allowed in controlled airspace, and always requires clearance from air traffic control (ATC). [4] It usually happens when the aircraft is inside controlled airspace, and the local weather is less than the minimums required for flight under visual flight rules (VFR) within the airspace in question.
VFR visibility and cloud clearance requirements are the same as for class C and D airspaces when below 10,000 feet (3,000 m) MSL. Above 10,000 ft MSL, the visibility requirement is extended to 5 miles (8 km) and the cloud clearance requirement is extended to 1,000 feet (300 m) below clouds, 1,000 feet (300 m) above, and 1 mile (1.6 km) laterally.
Visibility perception depends on several physical and visual factors. A realistic definition should consider the fact that the human visual system (HVS) is highly sensitive to spatial frequencies, and then to use the Fourier transform and the contrast sensitivity function of the HVS to assess visibility. [2]
While flying VFR-on-top, pilots are required to stay in an appropriate VFR altitude, maintain the required VFR visibility and cloud clearance requirement, while comply with other IFR requirements (minimum IFR altitudes, position reporting, radio communications, course to be flown, adherence to ATC clearance, etc). [2] [3]
In the United States, only pilots may initiate a request for this type of approach; regulations prohibit air traffic control (ATC) from asking pilots to perform them. [2] A contact approach will only be issued if the aircraft operates clear of clouds with at least 1 statute mile (1.6 km) of flight visibility, with a reasonable expectation of continuing to the destination airport under those ...
Ad
related to: visual visibility requirements