I have been trying to track down a long lost and long dead uncle. Could someone explain the numbers I have come across on my search. He Jumped ship in South Africa early part of last century. Record says AB seaman RS2 No 365346. Gives D o B as Feb1888 Ireland. Also Voyages 1919-02-14 Elder Branch.....ON122801 Sunderland (Ritson, F & W );. Help please Anne.