Hi John, very glad I could help with your request. I couldn't read the name on the ship and wasn't aware it was the one you were looking for. I took this slide while I was working for ASN on the Gaelic Ferry on the Felixstowe to Rotterdam run in mid 1966.
another amazing coincidence ! I just spoke to John Shaw about his postings of her as the " Petrogas 1". My Dad sailed on her for all of 1967/68 and this photo is priceless to me ! This is how I remember her.
I have not got any decent photos of her alongside , only postcard views that my dad sent to me .