NOAA Web Site Link Tides and Currents Home Page Transparent placeholder image

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 1 2018)
Units: Feet
Control Station: 9457292 Kodiak Island, AK
T.M.: 0
Epoch: 2012-2016
Datum: MLLW
DatumValueDescription
MHHW11.74Mean Higher-High Water
MHW10.94Mean High Water
MTL6.26Mean Tide Level
MSL6.18Mean Sea Level
DTL5.87Mean Diurnal Tide Level
MLW1.58Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-5.60Station Datum
GT11.74Great Diurnal Range
MN9.36Mean Range of Tide
DHQ0.80Mean Diurnal High Water Inequality
DLQ1.57Mean Diurnal Low Water Inequality
HWI10.63Greenwich High Water Interval (in hours)
LWI4.58Greenwich Low Water Interval (in hours)
Max Tide16.17Highest Observed Tide
Max Tide Date & Time11/25/2007 22:48Highest Observed Tide Date & Time
Min Tide-4.91Lowest Observed Tide
Min Tide Date & Time12/14/2008 06:00Lowest Observed Tide Date & Time
HAT15.25Highest Astronomical Tide
HAT Date & Time11/13/1985 22:54HAT Date and Time
LAT-3.87Lowest Astronomical Tide
LAT Date & Time07/12/1987 18:12LAT Date and Time
Tidal Datum Analysis Periods
05/01/2007 - 04/30/2008
07/01/2009 - 06/30/2017




Products available at 9457804 Alitak, AK

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services