Datums for 9466229, Offshore St Matthew Island GNSS Buoy AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9466229, Offshore St Matthew Island GNSS Buoy, AK
Status: Accepted (May 14 2026)
Units: Feet
Control Station: 9464212 Village Cove, St Paul Island, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW3.20Mean Higher-High Water
MHW2.90Mean High Water
MTL1.78Mean Tide Level
MSL1.67Mean Sea Level
DTL1.60Mean Diurnal Tide Level
MLW0.66Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-26.76Station Datum
GT3.19Great Diurnal Range
MN2.24Mean Range of Tide
DHQ0.30Mean Diurnal High Water Inequality
DLQ0.65Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich 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
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
08/01/2025 - 08/31/2025




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