Datums for 9457804, Alitak AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9457804, Alitak, AK
Status: Accepted (Aug 31 2020)
Units: Feet
Control Station: 9457292 Kodiak Island, AK
T.M.: 0
Epoch: 2012-2016
Datum: MLLW
DatumValueDescription
MHHW11.73Mean Higher-High Water
MHW10.93Mean High Water
MTL6.25Mean Tide Level
MSL6.17Mean Sea Level
DTL5.86Mean Diurnal Tide Level
MLW1.57Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-5.63Station Datum
GT11.73Great Diurnal Range
MN9.36Mean Range of Tide
DHQ0.80Mean Diurnal High Water Inequality
DLQ1.57Mean Diurnal Low Water Inequality
HWI10.62Greenwich High Water Interval (in hours)
LWI4.58Greenwich Low Water Interval (in hours)
Max Tide16.14Highest Observed Tide
Max Tide Date & Time11/25/2007 22:48Highest Observed Tide Date & Time
Min Tide-4.94Lowest Observed Tide
Min Tide Date & Time12/14/2008 06:00Lowest Observed Tide Date & Time
HAT15.23Highest Astronomical Tide
HAT Date & Time11/13/1985 22:54HAT Date and Time
LAT-3.88Lowest Astronomical Tide
LAT Date & Time07/12/1987 18:12LAT Date and Time
Tidal Datum Analysis Periods
05/01/2007 - 04/30/2008
06/01/2009 - 05/31/2019




Products available at 9457804 Alitak, AK