Datums for 9461710, Atka AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9461710, Atka, AK
Status: Accepted (May 23 2022)
Units: Feet
Control Station: 9461380 Adak Island, AK
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW3.42Mean Higher-High Water
MHW3.20Mean High Water
MTL1.86Mean Tide Level
MSL1.97Mean Sea Level
DTL1.71Mean Diurnal Tide Level
MLW0.52Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.88North American Vertical Datum of 1988
STND-26.94Station Datum
GT3.42Great Diurnal Range
MN2.68Mean Range of Tide
DHQ0.22Mean Diurnal High Water Inequality
DLQ0.51Mean Diurnal Low Water Inequality
HWIGreenwich High Water Interval (in hours)
LWIGreenwich Low Water Interval (in hours)
Max Tide5.57Highest Observed Tide
Max Tide Date & Time01/31/2022 04:00Highest Observed Tide Date & Time
Min Tide-2.72Lowest Observed Tide
Min Tide Date & Time12/13/2008 09:12Lowest Observed Tide Date & Time
HAT5.19Highest Astronomical Tide
HAT Date & Time01/09/2005 23:06HAT Date and Time
LAT-1.95Lowest Astronomical Tide
LAT Date & Time06/05/2004 23:36LAT Date and Time
Tidal Datum Analysis Periods
03/01/2008 - 02/28/2009
12/01/2011 - 11/30/2014
05/01/2015 - 04/30/2019




Products available at 9461710 Atka, AK