Datums for 9450970, Thoms Point AK


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9450970, Thoms Point, AK
Status: Superseded (Apr 17 2003) (Accepted Jul 26 2001)
Units: Feet
Control Station: 9450460 Ketchikan, AK
T.M.: 135
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW16.28Mean Higher-High Water
MHW15.42Mean High Water
MTL8.48Mean Tide Level
MSL8.48Mean Sea Level
DTL8.14Mean Diurnal Tide Level
MLW1.55Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND10.16Station Datum
GT16.31Great Diurnal Range
MN13.87Mean Range of Tide
DHQ0.87Mean Diurnal High Water Inequality
DLQ1.54Mean Diurnal Low Water Inequality
HWI9.57Greenwich High Water Interval (in hours)
LWI3.11Greenwich 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
HAT20.01Highest Astronomical Tide
HAT Date & Time11/15/2020 21:18HAT Date and Time
LAT-4.42Lowest Astronomical Tide
LAT Date & Time11/25/2003 03:54LAT Date and Time
Tidal Datum Analysis Periods
04/06/2001 - 05/12/2001




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