GLOSS Station Handbook

GLOSS Station Handbook – Zanzibar

The GLOSS Station Handbook is currently being re-designed and upgraded.

Until a new version is available, the tide gauge station list below from the last version of the Handbook provides links to further details about each tide gauge in the GLOSS Core Network. Click the GLOSS number buttons to view the information. Click column headings to sort the table.

Station information

Gloss number297
Station nameZanzibar
Time zone045E, GMT + 3hrs
Latitude (+ve N)-6.15
Longitude (+ve E)39.18333
Observation periods1950s Munro, 1984-
Responsible countryTanzania
Authority responsible for tide gaugeZanzibar Department of Surveys and Urban Planning, Commission of Lands and Environment, P.O. Box 811, Zanzibar, Tanzania
GLOSS contactTanzania
Committed to GLOSSYes
Location map
Digital dataYes
Data acquisition rateRecording at 10 minute intervals, filtered to hourly heights.
Fast delivery data at UHSLCData 151 File format
High frequency data at BODCData 297 Document 61391 Document 42146
High frequency data at UHSLCData 151a Document 151a File format
Real-time data availableYes
Real-time data transmitted to GLOSS Fast Centre
Additional parameters (real-time)None
Tide gauge benchmarkOld TGBM - about 30.0m from tide gauge (521209E, 9319992N)
Benchmark relationshipsBMI at Malindi roundabout = 3.80m above Land Survey Datum (1984, 1987)
Mean Sea Level is 2.08m above Chart Datum
Auxiliary benchmarksTGBM 1 is 3.709m above LSD
TGBM 2 is 3.750m above LSD
TGBM 3 is 3.925m above LSD
Data at PSMSL
Annual MSL (RLR) dataRLR 1600
Annual MSL (RLR) plot
MSL methodaverage of daily values
PSMSL code1600
Other relevant codesUHSLC 151
Additional information
Other relevant informationGauge re-located in Zanzibar Harbour during 1990. Daily values calculated using 119-point convolution filter (Bloomfield, 1976) centred on noon applied to the hourly data with respective periods of the 95, 50 and 5% amplitude points at 124.0, 60.2 and 40.2 hours.
Last updated26 September 1992