Surveys

Underwater operations in progress until further notice by dredge gerardus mercator in area between 51-20.0N…

North Sea · HYDROLANT 1894/17

issued: 2017-06-18 15:11Z
status: cancelled 2017-07-05 07:41Z (archive)
authority: WZ 719/17 181408Z JUN 17.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

NORTH SEA.
DNC 20.
UNDERWATER OPERATIONS IN PROGRESS UNTIL FURTHER
NOTICE BY DREDGE GERARDUS MERCATOR IN AREA BETWEEN
51-20.0N 51-19.0N AND 002-11.8E 001-45.0E.
WIDE BERTH REQUESTED.

Timeline

Cancel HYDROLANT 1894/17 and this msg, operations suspendedcancelled by · 2017-07-05

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

84 survey operations in force · see all

Surveys

Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →

Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.