Landing on a carrier in bad weather w.r.t. cloud base
What's the worst weather in terms of cloud base can an aircraft land on a carrier?
From what I've seen on TV, the aircraft judge their approach using something which I guess is the equivalent of PAPIs. Now presumably the aircraft can be vectored around to the ship if there is cloud (like a SRA) and once clear of cloud land visually.
I'm assuming that aircraft have no facility for an autoland so whats the minimum cloud base that this can be achieved. What happens if the cloud descends below that minimum, ditch?
Does the Ship have a TACAN or similar device that allows an instrument approach back to the ship?