Datums for 9459181, IVANOF BAY AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9459181, IVANOF BAY, AK
Status: Accepted (May 29 2025)
Units: Feet
Control Station: 9459450 Sand Point, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW7.62Mean Higher-High Water
MHW6.83Mean High Water
MTL4.08Mean Tide Level
MSL4.03Mean Sea Level
DTL3.81Mean Diurnal Tide Level
MLW1.32Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD881.27North American Vertical Datum of 1988
STND-24.26Station Datum
GT7.62Great Diurnal Range
MN5.52Mean Range of Tide
DHQ0.78Mean Diurnal High Water Inequality
DLQ1.31Mean Diurnal Low Water Inequality
HWI11.24Greenwich High Water Interval (in hours)
LWI4.97Greenwich 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
HAT10.05Highest Astronomical Tide
HAT Date & Time12/05/2025 22:42HAT Date and Time
LAT-2.93Lowest Astronomical Tide
LAT Date & Time06/04/2008 17:48LAT Date and Time
Tidal Datum Analysis Periods
06/01/2024 - 08/31/2024




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