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 5.818m to data values 1811-1881 to refer to RLR (1997)
Add 6.891m to data values 1882-1944 to refer to RLR (1997)
Add 1.953m to data values 1951onwards to refer to RLR (1997)
RLR (1997) is 9.9m below BM iron bolt