Lerwick (Shetland Isles) Datum Information 1980-
Benchmark Relationships
- TGZ = Chart Datum = 1.22m below OD
- TGZ = Chart Datum = 4.57m below TGBM
- TGZ = Chart Datum = 5.228m below Aux 1
- TGZ = Chart Datum = 23.495m below Aux 2
Glossary
- TGZ = Tide Guage Zero
- TGBM = Tide Gauge Benchmark
- AUX =Auxiliary Benchmark
- OD = Ordnance Datum - Local
- CD = Chart Datum
