Extra Score. Barrie Hingley, a former Principal Director of Music of the Royal Air Force, has written a stunning march in the true British tradition. It was commissioned to commemorate the endeavours of those who served in World War II in what was to become the Maritime Branch of the Royal Air Force. The title is taken from their motto Praedam Mari Quaero …. We seek our prey in the waters. (Grade 4) Performance time 6'24"