91.303 Special VFR weather minima

• A pilot-in-command of an aircraft may perform a VFR operation within a control zone in meteorological conditions below those prescribed in 91.301 if--
  • (1) the ceiling and flight visibility is--
    • (i) at least 600 feet and at least 1500 m respectively; or
    • (ii) for helicopters, less than 600 feet and less than 1500 m respectively if the helicopter is operated at a speed that will give adequate opportunity to observe other traffic or any obstructions in order to avoid collisions; and
  • (2) the aircraft is equipped with two-way radio capable of communicating with ATC on the appropriate frequency; and
  • (3) the operation is conducted--
    • (i) in compliance with an ATC clearance and any ATC instructions; and
    • (ii) only during the day; and
    • (iii) clear of clouds.