(2) The pilot in command finds, on reaching the authorized MDA, or DA/DH, that the actual weather conditions are at or above the minimums prescribed for the procedure being used. (B) Where a final approach fix is not specified, has completed the procedure turn and is established inbound toward the airport on the final approach course within the distance prescribed in the procedure and (A) Has passed the appropriate facility or final approach fix or (iii) The airplane is on a nonprecision final approach and the airplane. (ii) The airplane is on an ASR or PAR final approach and has been turned over to the final approach controller or Approach categories with the corresponding minimum RVR values Figure 1 Approach Category/Minimum RVR Table Ten minute maximum and minimum RVR values for the designated RVR runway are reported in the body of the aviation weather report when the prevailing visibility is less than one mile and/or the RVR is 6,000 feet or less. (i) The airplane is on a ILS approach and has passed the final approach fix (1) The later weather report is received when the airplane is in one of the following approach phases: The regulations define weather flight conditions for visual flight rules (VFR) and instrument flight rules (IFR) in terms of specific values for ceiling and visibility. (c) If a pilot initiates an instrument approach procedure based on a weather report that indicates that the specified visibility minimums exist and subsequently receives another weather report that indicates that conditions are below the minimum requirements, then the pilot may continue with the approach only if, the requirements of ยง91.175(l) of this chapter, or both of the following conditions are met- Step 1 Review Weather Minimums Most people think of personal minimums primarily in terms of weather conditions, so begin with a quick review of weather definitions. (1) Unless otherwise authorized by the FAA, no pilot may takeoff from a civil airport under IFR unless the weather conditions at time of takeoff are at or above the weather minimums for IFR takeoff. (b) Except as provided in paragraph (c) of this section, no pilot may execute an instrument approach procedure if the latest reported visibility is less than the landing minimums specified in the certificate holder's operations specifications. This paragraph applies to persons operating an aircraft under part 121, 125, 129, or 135 of this chapter. (2) Except as provided in paragraph (c) of this section, land an airplane under IFR. (a) Regardless of any clearance from ATC, if the reported weather conditions are less than that specified in the certificate holder's operations specifications, no pilot may. However, trying to memorize them for both testing and flight planning is. Doolittle pulled it off when he conducted the first blind flight in 1929. The rules and regulations are very clear when it comes to VFR weather minimums. 125.381 - Takeoff and landing weather minimums: IFR. Flying in clear skies is easy, but how do pilots fly in foggy weather Aviators relied on sight to fly aircraft in the early days of aviation, flying without seeing outside the cockpit was impossible for quite some time.