Surveys

Underwater operations in progress until 252000Z sep by underwater glider sea explorer in: a. 33-00.00S…

South Pacific Ocean · HYDROPAC 3055/23

What this record establishes

Archived notice · 2023-09-25 21:00Z

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 XV 222/23 250218Z SEP 23.. Issued 2023-09-25 06:05Z. 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 Pacific Ocean. The parsed report position is -33.000, -72.658. 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 Pacific Ocean →

issued: 2023-09-25 06:05Z
status: Archived notice
self-cancels: 2023-09-25 21:00Z
authority: NAVAREA XV 222/23 250218Z SEP 23.
NAVAREA: NAVAREA XV · named as the source of this relay
sea: South Pacific Ocean
position: -33.000, -72.658
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN SOUTH PACIFIC.
CHILE.
DNC 07.
1. UNDERWATER OPERATIONS IN PROGRESS UNTIL 252000Z SEP
   BY UNDERWATER GLIDER SEA EXPLORER IN:
   A. 33-00.00S 071-39.00W.
   B. 33-00.00S 071-53.00W.
   C. 33-00.00S 072-18.00W.
   D. 33-00.00S 072-44.00W.
   E. 33-00.00S 073-23.00W.
   F. 33-00.00S 074-00.00W.
   WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 252100Z SEP 23.

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.
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

31 within 180 nm since 2019 · 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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

55 survey operations listed in force · see all

Record snapshot 2026-10-02 07:50Z; 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.