I'm going back to the 50"s and 60"s, although I assume this wire is mentioned on google and in books as the Insurance wire, the correct term should be towing wire is that right. As regards tankers the year I spent on such it was mandatory in most ports to have a line at each end to the waterline for tugs to pull you off the berth in an emergency, these usually consisted of mooring lines. As someone says there is no way nowadays that a present crew could pull off this very heavy wire the way it used to be carried. On offshore vessels was well used to handling wires of similar size but were always on power driven winches. We had a total crew of 38 deep sea and took nearly everyone to pull off and pass through after fairlead and to forward anchor cable for the purpose of making a lee for lighters. a 4 hour job at least. It is impossible to handle such size wires without mechanical power with present crew sizes on deep sea ships. However will have to read the new regulations in depth to grasp the new laws coming into force. These paper pushers must have a lifelong job ahead of them with all this new legislation forever coming out...Regards John Sabourn