And anyone who's spent a few hours flying in the back of a herc will know it's a crap idea. The U.K. Would be better off with refurbished P3's or S3's
I understand why people would view the 'Vomit Comet' as a poor platform for a maritime patrol/ASW aircraft. But the C295 and other smaller cargo aircraft have been quite successful in this role. It makes me wonder if the C-130 could not be made into a suitably stable platform with a better stabilization system. Do they not have fly-by-wire flight control systems these days? Computer-controlled surfaces should be able to render a smooth ride. A removable shelter system that could be fitted into the cargo bay would provide both the required crew comfort and equipment environmental protection and cooling, along with quick convertibility back to the cargo role if required. Weapons pylons have already been fitted to C-130s, though heavier-duty ones would likely be required. This does not seem to be a big stretch so far as the engineering challenge. The logistical advantages are obvious.
And as I recall, the Brits are already using a C-130 equipped with a surface-scanning RADAR for maritime patrol out of MPA. How is that working out?