Surveys

Underwater operations 081230Z to 081530Z feb by M/V omega, M/V leonis, M/V LAEP-10 and M/V dourado in area…

South Atlantic Ocean · HYDROLANT 430/17

What this record establishes

Archived notice · 2017-02-08 16:30Z

This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.

Source and dates: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA V COASTAL 130/17 072020Z FEB 17.. Issued 2017-02-07 20:32Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered: South Atlantic Ocean. The parsed report position is -8.056, -34.742 with a 2.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the South Atlantic Ocean →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2017-02-08 12:30Z	2017-02-08 15:30Z	—	3 h

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

issued: 2017-02-07 20:32Z
status: Archived notice
self-cancels: 2017-02-08 16:30Z
authority: NAVAREA V COASTAL 130/17 072020Z FEB 17.
NAVAREA: NAVAREA V · named as the source of this relay
issued by: NAVAREA V COASTAL
sea: South Atlantic Ocean
position: -8.056, -34.742 · r 2.0 nm
vessels: M/V DOURADO M/V LAEP-10 M/V LEONIS M/V OMEGA
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN SOUTH ATLANTIC.
BRAZIL-NORTHEAST COAST.
DNC 01.
1. UNDERWATER OPERATIONS 081230Z TO 081530Z FEB
   BY M/V OMEGA, M/V LEONIS, M/V LAEP-10 AND
   M/V DOURADO IN AREA WITHIN TWO MILES OF
   08-03.33S 034-44.50W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 081630Z FEB 17.

Reading this warning

DNC (Digital Nautical Chart): A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
Underwater operations: Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
Date-time group (DTG): A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
Within a radius of: A circular area — every position within a stated distance of a point.
Position (degrees and minutes): How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
Wide berth requested: Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
CANCEL THIS MSG: The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Collected reports in this area · survey operations

38 within 180 nm since 2000 · 0 in the last 12 months · 0 listed in force now

Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.

Month of issue in the collected archive

All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.

Nearby notices listed in force · within 120 nm

Tamandare light 08-45.57S 035-06.08W unlit until 02 novNav aids · 47.4 nm
Maceio light 09-41.03S 035-43.38W unlit until 31 octNav aids · 113.8 nm

Worldwide in the collected sources

56 survey operations listed in force · see all

Record snapshot 2026-10-03 04:31Z; source collection times vary.

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.