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If the image above appears blurry, or you would like to see a larger image, please view the full-sized image of the RLR diagram.
Add 4.362m to data values 1887-1922 to refer to RLR
Add 8.721m to data values 1923-1936 to refer to RLR
Add 4.731m to data values 1937-1999 to refer to RLR
Add 0.300m to data values 2000 onwards to refer to RLR
RLR is 10.300m below primary benchmark BM c