Gives the requirements for the design and manufacture of Shock Support Brackets and Fixings for all portable Fire Extinguishers as described in BS EN 3 Part 5, DEFSTAN 07-204 Parts 1 and 3, DEFSTAN 02-860 Parts 2, 3 and 4, BR 2170, BR 4007 and BR 8470 as used on board HM Surface Ships and Submarines.