Datums for 9457726, Geese Island GPS Tide Buoy AK

Data Quality Data from this station was collected using methodology that does not meet CO-OPS highest level of accuracy (no more than 10 cm, 95% Confidence Interval (CI) referenced to a tidal datum). Recognizing that lower quality data can be used for certain applications CO-OPS is making this data available to its users with restraint. The average six-minute water level observations derived from this system have an accuracy ranging from 10.0 - 30.0 cm, 95% CI on datum. Users are cautioned to consider the accuracy of these data before using them for critical navigational or coastal engineering purposes.
NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 9457726, Geese Island GPS Tide Buoy, AK
Status: Accepted (Jun 22 2018)
Units: Feet
Control Station: 9457292 Kodiak Island, AK
T.M.: 135
Epoch: 2012-2016
Datum: MLLW
DatumValueDescription
MHHW8.76Mean Higher-High Water
MHW8.15Mean High Water
MTL4.69Mean Tide Level
MSL4.61Mean Sea Level
DTL4.38Mean Diurnal Tide Level
MLW1.23Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-39.89Station Datum
GT8.76Great Diurnal Range
MN6.92Mean Range of Tide
DHQ0.61Mean Diurnal High Water Inequality
DLQ1.23Mean Diurnal Low Water Inequality
HWI10.43Greenwich High Water Interval (in hours)
LWI4.27Greenwich 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
HAT10.80Highest Astronomical Tide
HAT Date & Time11/15/2016 22:36HAT Date and Time
LAT-2.76Lowest Astronomical Tide
LAT Date & Time11/25/2003 05:06LAT Date and Time
Tidal Datum Analysis Periods
06/28/2016 - 07/27/2016


Products available at 9457726 Geese Island GPS Tide Buoy, AK
  • Meteorological/Other
  • Meteorological Observations
  • Water Temp/Conductivity
  • PORTS®
  • This station is not a member of PORTS®