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Current Datum Value: 2.71

Datums for 8423898, Fort Point NH


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8423898, Fort Point, NH
Status: Accepted (Dec 7 2016)
Units: Feet
Control Station: 8418150 Portland, ME
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW9.39Mean Higher-High Water
MHW8.97Mean High Water
MTL4.65Mean Tide Level
MSL4.69Mean Sea Level
DTL4.70Mean Diurnal Tide Level
MLW0.34Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD885.00North American Vertical Datum of 1988
STND-2.71Station Datum
GT9.39Great Diurnal Range
MN8.63Mean Range of Tide
DHQ0.43Mean Diurnal High Water Inequality
DLQ0.34Mean Diurnal Low Water Inequality
HWI3.74Greenwich High Water Interval (in hours)
LWI9.85Greenwich Low Water Interval (in hours)
Max Tide12.28Highest Observed Tide
Max Tide Date & Time01/02/2010 16:48Highest Observed Tide Date & Time
Min Tide-2.71Lowest Observed Tide
Min Tide Date & Time02/02/2018 23:42Lowest Observed Tide Date & Time
HAT11.51Highest Astronomical Tide
HAT Date & Time06/14/1995 04:12HAT Date and Time
LAT-2.08Lowest Astronomical Tide
LAT Date & Time04/27/1994 10:48LAT Date and Time
Tidal Datum Analysis Periods
10/01/2003 - 09/30/2005
01/01/2008 - 12/31/2010
08/01/2011 - 07/31/2014




Products available at 8423898 Fort Point, NH

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services