=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Tonoura 647/021 RLR(1966) is 10.0m below Attached BM =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Jul-1993 Tonoura 647/021 RLR(1966) is 10.0m below Attached BM =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-Jul-1993 Low values compared to neighbours for June-September 1945 - correct as received from authority.