Surveys

Underwater operations 142300Z to 161800Z mar by M/V poseidon in area between 36-45N 37-05N and 008-10W 007-35W

Eastern North Atlantic · Gulf of Cadiz · Portugal · HYDROLANT 601/15

issued: 2015-03-12 16:38Z
status: cancelled 2015-03-15 17:01Z (archive)
self-cancels: 2015-03-16 19:00Z
authority: NAVAREA II 79/15 121624Z MAR 15.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH ATLANTIC.
GULF OF CADIZ.
PORTUGAL.
DNC 08.
1. UNDERWATER OPERATIONS 142300Z TO 161800Z MAR
   BY M/V POSEIDON IN AREA BETWEEN
   36-45N 37-05N AND 008-10W 007-35W.
2. CANCEL THIS MSG 161900Z MAR 15.

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2015-03-14 23:00Z	2015-03-16 18:00Z	—	43 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

Timeline

Underwater operations in progress by M/V poseidon: a. until 161800Z mar in area between 36-45N 37-05N and…cancelled by · 2015-03-15

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.