Abbreviations used on the databaseRatings field Officers: First letter upper case ratings: lower case asst: assistant rec: recruit jnr: junior Seaman Department M: Mate 2 M: 2nd mate etc 2 O: 2nd officer etc C: captain mdshpmn: midshipman bosn: boatswain os: ordinary seaman ab: able seaman slr: sailor smn: seaman qtrmstr: quartermaster app: apprentice ht: home trade Engineering Department E: Engineer 2 E: 2nd Engineer etc Ch E: Chief Engineer Ref E: Refrigeration Engineer elect: electrician fmn: fireman stkr: stoker trmr: trimmer f & t: fireman & trimmer grsr: greaser dkymn: donkeyman WO: Wireless Officer carp: carpenter Catering Department stwd: stwd ch stwd: chief steward mess stwd: mess room steward 2 stwd: 2nd class steward etc Certificates field Seamen competency certificates in 1920 There were three main numbering systems 1.home trade numbers are six digit and start with 1 2. Foreign trade numbers either start with one zero, the earlier system. or start with double zero, for steamships (ss) The number will stay the same for examinations passed as second mate. (2m) first mate. (1m) ordinary master (oc) extra master (ex c) If the certificate was lost then a new number was issued. Some officers moved from the earlier system to the steamship system of numbering. There was also a numbering system for fishing vessels certificates |