Datums for 9456173, SNUG HARBOR AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9456173, SNUG HARBOR, AK
Status: Accepted (May 21 2025)
Units: Feet
Control Station: 9455500 Seldovia, AK
T.M.: 0
Epoch: 2012-2016
Datum: MLLW
DatumValueDescription
MHHW15.89Mean Higher-High Water
MHW15.14Mean High Water
MTL8.47Mean Tide Level
MSL8.53Mean Sea Level
DTL7.95Mean Diurnal Tide Level
MLW1.80Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD883.71North American Vertical Datum of 1988
STND-25.39Station Datum
GT15.90Great Diurnal Range
MN13.34Mean Range of Tide
DHQ0.75Mean Diurnal High Water Inequality
DLQ1.80Mean Diurnal Low Water Inequality
HWI12.24Greenwich High Water Interval (in hours)
LWI6.05Greenwich 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
HAT21.12Highest Astronomical Tide
HAT Date & Time11/16/2016 00:30HAT Date and Time
LAT-5.70Lowest Astronomical Tide
LAT Date & Time05/27/2021 19:00LAT Date and Time
Tidal Datum Analysis Periods
07/01/2024 - 08/31/2024




Products available at 9456173 SNUG HARBOR, AK