Spoken like a 3M regarding Engineering matters….
It’s never that simple.
He said he was on a Tanker.
ISGOTT rules mandate all cargo tanks within a radius of 30 meters around the working area should be emptied, cleaned, gas freed and maintained of hydrocarbons <1% LFL. That’s for starters. ABS or Class will have to approve the repairs, it has to be by a certified welder and no one is going to be certified on his tanker most likely.