Add 5.302m to data 1988-1993 to refer to RLR (1989)
Add 5.276m to data 1994-5 to refer to RLR (1989)
Add 5.248m to data 1996-7 to refer to RLR (1989)
Add 5.276m to data 1998- to refer to RLR (1989)
RLR (1989) is 8.468m below BM 2
For all above references refer to documentation
