Datums for 9450973, Blashke Island


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9450973, Blashke Island
Status: Superseded (Apr 17 2003) (Accepted Mar 10 2003)
Units: Feet
Control Station: 9450460 Ketchikan, AK
T.M.: 135
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW15.80Mean Higher-High Water
MHW14.91Mean High Water
MTL8.20Mean Tide Level
MSL8.10Mean Sea Level
DTL7.89Mean Diurnal Tide Level
MLW1.48Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-13.26Station Datum
GT15.82Great Diurnal Range
MN13.43Mean Range of Tide
DHQ0.88Mean Diurnal High Water Inequality
DLQ1.48Mean Diurnal Low Water Inequality
HWI9.68Greenwich High Water Interval (in hours)
LWI3.50Greenwich 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
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
08/26/2002 - 09/17/2002




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