Datums for 8448875, Marthas Vineyard GPS Buoy MA


Data Quality Data from this station was collected using methodology that does not meet CO-OPS highest level of accuracy (no more than 10 cm, 95% Confidence Interval (CI) referenced to a tidal datum). Recognizing that lower quality data can be used for certain applications CO-OPS is making this data available to its users with restraint. The average six-minute water level observations derived from this system have an accuracy ranging from 10.0 - 30.0 cm, 95% CI on datum. Users are cautioned to consider the accuracy of these data before using them for critical navigational or coastal engineering purposes.
NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8448875, Marthas Vineyard GPS Buoy, MA
Status: Accepted (Jul 12 2016)
Units: Feet
Control Station: 8452660 Newport, RI
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW3.12Mean Higher-High Water
MHW2.90Mean High Water
MTL1.51Mean Tide Level
MSL1.44Mean Sea Level
DTL1.56Mean Diurnal Tide Level
MLW0.12Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND97.00Station Datum
GT3.12Great Diurnal Range
MN2.78Mean Range of Tide
DHQ0.23Mean Diurnal High Water Inequality
DLQ0.12Mean Diurnal Low Water Inequality
HWI12.21Greenwich High Water Interval (in hours)
LWI5.96Greenwich Low Water Interval (in hours)
Max TideHighest Observed Tide
Max Tide Date & Time Highest Observed Tide Date & Time
Min TideLowest Observed Tide
Min Tide Date & Time Lowest Observed Tide Date & Time
HAT4.05Highest Astronomical Tide
HAT Date & Time11/05/1998 12:42HAT Date and Time
LAT-0.78Lowest Astronomical Tide
LAT Date & Time03/09/1993 18:54LAT Date and Time
Tidal Datum Analysis Periods
06/15/2015 - 07/14/2015




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