DPIII : Much the same as DPII except that additionally the system is not vulnerable to accident, such as engine room fire. This requires a DPIII vessel to have two engine rooms
www.shipsandoil.com (originally www.mmass.co.uk a website set up bring to the notice of the world the presence of Marex Marine Services by featuring details of supply vessels from all over the world), Glossary of Terms - Ships and Oil, Aberdeen, UK 2012. http://www.shipsandoil.com/features/Glossary%20of% 20Terms.htm, (Mrtm/ Ships and Oil) {582}