Datums for 9461380, Adak Island AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9461380, Adak Island, AK
Status: Superseded (Apr 17 2003) (Accepted Sep 29 1998)
Units: Feet
Control Station:
T.M.: 0
Epoch: SPECIAL
Datum: MLLW
DatumValueDescription
MHHW3.82Mean Higher-High Water
MHW3.58Mean High Water
MTL2.08Mean Tide Level
MSL2.21Mean Sea Level
DTL1.91Mean Diurnal Tide Level
MLW0.58Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-2.92Station Datum
GT3.82Great Diurnal Range
MN3.00Mean Range of Tide
DHQ0.24Mean Diurnal High Water Inequality
DLQ0.58Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide6.88Highest Observed Tide
Max Tide Date & Time12/28/1966 22:24Highest Observed Tide Date & Time
Min Tide-3.01Lowest Observed Tide
Min Tide Date & Time11/26/2003 10:54Lowest Observed Tide Date & Time
HAT5.69Highest Astronomical Tide
HAT Date & Time01/09/2005 22:48HAT Date and Time
LAT-1.90Lowest Astronomical Tide
LAT Date & Time06/16/2026 22:18LAT Date and Time
Tidal Datum Analysis Periods
01/01/1980 - 12/31/1989




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