=========================== 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.

