Datums for 9465988, Cape Corwin 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: 9465988, Cape Corwin GPS Tide Buoy, AK
Status: Accepted (Mar 18 2020)
Units: Feet
Control Station: 9459450 Sand Point, AK
T.M.: 135
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW7.16Mean Higher-High Water
MHW6.69Mean High Water
MTL3.72Mean Tide Level
MSL3.73Mean Sea Level
DTL3.58Mean Diurnal Tide Level
MLW0.75Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD88
STND-33.64Station Datum
GT7.16Great Diurnal Range
MN5.95Mean Range of Tide
DHQ0.47Mean Diurnal High Water Inequality
DLQ0.75Mean Diurnal Low Water Inequality
HWI8.28Greenwich High Water Interval (in hours)
LWI2.26Greenwich 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
HAT8.88Highest Astronomical Tide
HAT Date & Time11/30/2038 11:24HAT Date and Time
LAT-1.48Lowest Astronomical Tide
LAT Date & Time11/27/2007 03:36LAT Date and Time
Tidal Datum Analysis Periods
08/01/2019 - 08/31/2019


Products available at 9465988 Cape Corwin GPS Tide Buoy, AK
  • Meteorological/Other
  • Meteorological Observations
  • Water Temp/Conductivity
  • PORTS®
  • This station is not a member of PORTS®