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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: Accepted (May 26 2011)
Units: Feet
Control Station: 9450460 Ketchikan, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW16.33Mean Higher-High Water
MHW15.45Mean High Water
MTL8.50Mean Tide Level
MSL8.49Mean Sea Level
DTL8.17Mean Diurnal Tide Level
MLW1.55Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND10.19Station Datum
GT16.33Great Diurnal Range
MN13.90Mean Range of Tide
DHQ0.88Mean Diurnal High Water Inequality
DLQ1.55Mean Diurnal Low Water Inequality
HWI9.53Greenwich 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
HAT19.98Highest Astronomical Tide
HAT Date & Time11/13/1985 21:36HAT Date and Time
LAT-4.35Lowest Astronomical Tide
LAT Date & Time12/24/1999 04:12LAT Date and Time
Tidal Datum Analysis Periods
04/07/2001 - 05/06/2001




Products available at 9450970 Thoms Point, AK

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