Datums for 8423898, Fort Point NH


NOTICE: All data values are relative to the MSL.

Elevations on Mean Sea Level

Station: 8423898, Fort Point, NH
Status: Accepted (Dec 7 2016)
Units: Meters
Control Station: 8418150 Portland, ME
T.M.: 0
Epoch: 1983-2001
Datum: MSL
DatumValueDescription
MHHW1.434Mean Higher-High Water
MHW1.304Mean High Water
MTL-0.011Mean Tide Level
MSL0.000Mean Sea Level
DTL0.003Mean Diurnal Tide Level
MLW-1.326Mean Low Water
MLLW-1.429Mean Lower-Low Water
NAVD880.095North American Vertical Datum of 1988
STND-2.255Station Datum
GT2.863Great Diurnal Range
MN2.631Mean Range of Tide
DHQ0.130Mean Diurnal High Water Inequality
DLQ0.102Mean Diurnal Low Water Inequality
HWI3.740Greenwich High Water Interval (in hours)
LWI9.850Greenwich Low Water Interval (in hours)
Max Tide2.313Highest Observed Tide
Max Tide Date & Time01/02/2010 16:48Highest Observed Tide Date & Time
Min Tide-2.256Lowest Observed Tide
Min Tide Date & Time02/02/2018 23:42Lowest Observed Tide Date & Time
HAT2.087Highest Astronomical Tide
HAT Date & Time05/19/2034 04:18HAT Date and Time
LAT-2.082Lowest Astronomical Tide
LAT Date & Time04/01/2033 10:54LAT 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