Cats 5
Having spoken to a few people who are 'involved' it also seems that some of the repair schemes applied to the Vikings break some of the rules with regard to size and style of repairs for the size of damage which potentially are not 'best practice' (read into that what you will).
Of course these repairs are not fully documented and have to be fully investigated before they are released to service (or re-repaired).
The good news is that the companies who are now doing the work do know what they are doing...............
No timeframes of course.
Arc