Thanks for the responses.
jte, the vessels aren't related to nuclear.
SnTMan, you're probably correct. Drawing origin is from the UK. I wanted to eliminate the obvious answer before I looked stupid asking the customer about it.
innovation2, we normally wouldn't think much about seismic analysis since these vessels convey material & are small. I'd hope seismic data would be listed separately from the BPV code note.
Thanks,
Dale