Link to RLR information.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 : Portsmouth(Norfolk) 960/065 RLR(1973) is 8.6m below BM"Yard"=5 =========================== BENCHMARK INFORMATION UPDATE ADDED 12-JUL-93 : Portsmouth(Norfolk) 960/065 RLR(1973) is 8.6m below BM"Yard"=5 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 23-Feb-2012 : This is now an Historic station last data received was that for 1987. On the original RLR diagram the Primary benchmark was listed as BM 'Yard' 5 3.984 relative to TGZ this corresponds with NOAA listed Primary benchmark named F 9 USN.
N.O.A.A. / N.O.S. N/oes33, Ssmc4, Room 6531 1305 East-West Highway Silver Spring, MD 20910 UNITED STATES