 The Maritime Warfare School is a federated training establishment incorporating HMS "Excellent", the Defence Diving School, the RN Physical Training School, the School of Hydrography and Meteorology in Plymouth and the Royal Marines School of Music in Portsmouth Naval Base.HMS "Collingwood" gained its name from Lord Collingwood, a distinguished admiral at the turn of the 19th century.The current shore establishment was commissioned as the fourth HMS "Collingwood" on 10 January 1940, initially to instruct "hostilities only" ratings of the seaman branch.