As
Intruder mentioned, modern aircraft carriers have a range of navigational and landing aids that would put most airports to shame. As for autoland, modern carrier aircraft (F/A-18
Hornet/Super Hornet, Dassault
Rafale M, etc.) have autoland capability. Not too sure about larger TP aircraft such as the E-2C
Hawkeye or C-2
Greyhound. While a reduced sortie rate can be achieved in fairly nasty weather (eg. North Atlantic in winter), there must be minima under which operations wouldn't be possible.
One advantage of landing on an aircraft carrier though is that the "runway" can turn into wind!
Cheers