- Jun 22, 2002
- Total Time
FAR part 91.175 says wx mins for takeoff need to be 1sm vis for two engines or less. This just doesn't make sense since they can land at 1/2sm vis on a Cat I ILS. Basically you could have a situation where all the jets could get in, but none get out? In the military, the standard for big airplanes is 1600 RVR. For some of the smaller jets it approach mins. It seems like I have been on airplanes taking off in less than a mile vis while traveling commercial before. I am specifically looking for how part 121 operators use this. Part 121 tyalks about a departure alternate, but it makes no reference to minimum weather required.