ALL DUTCH METRIC DATA ARE MEASURED TO NAP (NORMAAL AMSTERDAMSCH PEIL)
Documentation added 1996-07-16
replaces Stellendam Buiten 150/072
Documentation added 2001-08-14
Haringvliet 10 is a Enraf Nonius DNM (Digitale Niveau Meter) float gauge installed on a 'pile' 5 km from shore. June 28th 2001 the 20m high 'pile' was again replaced. This makes the use of benchmarks difficult. All data supplied to the PSMSL is to NAP.
Documentation added 2001-08-20
Haringvliet - RIKZ note October 1999 onwards data rising, up to approx. 3 cm by December 2000. Difficult to verify as no benchmark available.
Documentation added 2011-02-10
From recent information received giving values of NAP both before and after the re-levelling exercise of 2005 most of the Dutch stations have been converted to RLR. However, as this station is an offshore tide gauge which hasn't been re-checked since it's installation it remains 'Metric'.
Servicedesk Data Rijkswaterstaat Postbus 556 3000 AN Rotterdam