Membership & Eligibility The following are eligible for membership: officers and ratings, active, reservist or retired, of the Armed Forces of the Crown and the Commonwealth; also members of the Royal Corps of Naval Constructors, and officers and ratings of the RMAS and RFA Service; and civil servants who hold or have held appointments in the Naval Commands, or appointments with a naval connection across the UK Ministry of Defence and associated organisations; and officers and ratings, active or retired, of the Armed Forces of NATO nations with which the United Kingdom has strong military…