Sky-738
Ops say lot of RVR,
When mentioned cloud base ,only one sentence say that we need to refer to cloud base and RVR/vis, no detail describe .
Cloudbase needs be referred to as for instance when doing a non-precision approach with O/001 it makes little sense when you need e.g. 500' base, but when only F/001, why not commence the approach as the chance of not seeing runway is slim.
B/001 does not indicate you will not see anything at minimums.
If a precision approach takes you to 200' AGL then chances are there may be enough visual references for you to continue and land safely on that approach.
As long as there is sufficient horizontal visibility available, an approach may be commenced (subject to LVO requirements if so restricted of course)
From an operator's perspective, instructing crew to divert in favour of attempting an approach costs a lot more money then letting them attempt an approach (or two) before making the diversion a reality.
After all, we all rather have happy passengers, a return flight (more or less) on time and no disruption to the entire onwards operation, rather then divert, wait maybe for buses before returning to base, hours delayed and at what cost and inconvenience to passengers...