Surveys

Underwater operations 21 thru 24 nov by M/V poseidon in area between 28-00N 27-40N and 014-48W 014-25W

Eastern North Atlantic · Canary Islands · HYDROLANT 1937/11

issued: 2011-11-19 06:36Z
status: cancelled 2011-11-25 00:01Z (archive)
cancels: HYDROLANT 1917/11
authority: NAVAREA II 420/11 190433Z NOV 11 - WZ 1184/11 171442Z NOV 11 - WZ 1191/11 181521Z NOV 11.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH ATLANTIC.
CANARY ISLANDS.
1. UNDERWATER OPERATIONS 21 THRU 24 NOV
   BY M/V POSEIDON IN AREA BETWEEN
   28-00N 27-40N AND 014-48W 014-25W.
   WIDE BERTH REQUESTED.
2. CANCEL HYDROLANT 1917/11(36) AND
   1919/11(35), AIDS RESTORED.
3. CANCEL THIS MSG 25 NOV.

Timeline

Nga chart 36006 (1ST ed)cancels · 2011-11-16
Nga chart 36006 (1ST ed)replaced · 2011-11-16
Nga chart 35119 (2ND ed)replaced · 2011-11-16
Hazardous operations 1800Z to 0400Z commencing daily 29 nov thru 07 dec in area bound by 05-46.00S…cancelled by · 2011-11-24

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

86 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.