Regarding RA4000's post...I mostly agree, and have subscribed to that opinion or interpretation for years, however just try to discuss with the FAA and be on the same page....I have seen many FAA ops inspectors and those in training argue you must follow what is on chart. Everybody has an opinion and it is just that, the only thing that ultimately holds up is FAA legal interpretation
Often times it may be something subtle, LIke how far apart the centerline lighting is spaced etc. my ops specs say 500 RVR/150 Meters, but need among other things centerline lighting at 50? Foot intervals, and our home base airport had non standard lighting at 60.....so had to use 200 meters.
Just playing Devils advocate....I have been cat3-B authorized for nearly 20 years.
My various ops spec say I can do cat 3...no decision height and only require 75 meters RVR.
But if I go to an airport that only has a cat 2 approach, or cat3 a, or cat 3B with a decision height, like France has, then it is required I use minimums per chart?
Low visibility procedures are affected/limited by crew, aircraft, and airport operating at.....so one can argue takeoff is no different.
Honestly I don't know for sure....I've always found as long as there is no accident most likely no one cares! Seriously though it is confusing cause they say these are Your Ops Specs...this is what you follow....But?
Maybe using Govt. Chart is easier because you have only standard takeoff minimums, so you apply ops specs, thee is no conflicting information...easy like that!