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Established:Jul 22, 1910
Time Meridian:75° W
Present Installation:Jul 22, 1910
Date Removed:1993-01-29
Water Level Max (ref MHHW):4.93 ft. Sep 18, 1936
Water Level Min (ref MLLW):-3.56 ft. Jan 31, 1966
Mean Range:2.76 ft.
Diurnal Range:3.1 ft.
Latitude36° 49.3' N
Longitude76° 17.6' W
NOAA Chart#:12221
Met Site Elevation: ft. above
Today's Tides (LST)
graphical depiction of low tide
4:25 AM
3:20 AMhigh 2.5 ft.
9:58 AMlow 0.3 ft.
3:46 PMhigh 2.1 ft.
10:03 PMlow 0.0 ft.

How to reach: To reach the bench marks from the intersection of Interstate Highway 264 and Effingham Street (Route 141), proceed south 1.4 km (0.9 mi) to the Naval Shipyard entrance. At the pass office at the gate entrance, call 8273 for an escort. You must have an escort for the entrance to the CIA area.

Products available at 8638660 PORTSMOUTH, NORFOLK NAVAL SHIPYARD, VA

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