Surveys

Oceanographic operations 122000Z to 150300Z nov by M/V ocean surveyor towing 84 meter long cable in area…

HYDROLANT 1827/04

issued: 2004-11-12 08:45Z
status: cancelled 2004-11-15 04:00Z (archive)
self-cancels: 2004-11-15 04:00Z
cancels: HYDROLANT 1802/04
authority: NAVAREA V 862/04 120402Z NOV 04.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

1. OCEANOGRAPHIC OPERATIONS 122000Z TO 150300Z NOV
   BY M/V OCEAN SURVEYOR TOWING 84 METER LONG CABLE
   IN AREA BETWEEN 11-06.2S 11-12.0S AND 037-05.2W 036-55.4W.
   FOUR MILE BERTH REQUESTED.
2. CANCEL HYDROLANT 1802/04.
3. CANCEL THIS MSG 150400Z NOV.

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2004-11-12 20:00Z	2004-11-15 03:00Z	—	55 h

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

Timeline

Oceanographic operations 112100Z to 150300Z nov by M/V ocean surveyor towing 84 meter long cable in area…cancels · 2004-11-09
Oceanographic operations 112100Z to 150300Z nov by M/V ocean surveyor towing 84 meter long cable in area…replaced · 2004-11-09

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.