Underwater operations 250600Z sep to 100600Z oct by submersible alvin and vessel atlantis in area within 65…
Gulf of Mexico · NAVAREA IV 963/22
What this record establishes
Archived notice · 2022-10-10 07:00Z
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) · WHOI 0/22 202349Z SEP 22.. Issued 2022-09-21 01:04Z. 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
- Gulf of Mexico. The parsed report position is 27.500, -90.750 with a 65.0 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 Gulf of Mexico →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2022-09-25 06:00Z | 2022-10-10 06:00Z | — | 360 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2022-09-21 01:04Z
- status
- Archived notice
- self-cancels
- 2022-10-10 07:00Z
- authority
- WHOI 0/22 202349Z SEP 22.
- NAVAREA
- NAVAREA IV
- issued by
- WHOI
- sea
- Gulf of Mexico
- position
- 27.500, -90.750 · r 65.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF MEXICO. LOUISIANA. 1. UNDERWATER OPERATIONS 250600Z SEP TO 100600Z OCT BY SUBMERSIBLE ALVIN AND VESSEL ATLANTIS IN AREA WITHIN 65 MILES OF 27-30.00N 090-45.00W. 2. CANCEL THIS MSG 100700Z OCT 22.
Reading this warning
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · survey operations
50 within 180 nm since 2002 · 3 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.
- Survey operations in progress until 31 dec by M/V island frontier with M/V rem andes and M/V sanco sword…2026-08-22
- Survey operations in progress until 31 dec by M/V island frontier in area bound by 27-54.83N 092-06.05W,…2026-08-06
- Survey operations in progress until 15 sep by M/V island pride, M/V sanco swift and M/V olympic artemis in…2026-06-15
- Survey operations 10 sep thru 31 mar 25 by M/V sanco spirit, M/V rem andes and M/V siem spearfish towing 400…2024-09-03
- Survey operations in progress until 25 jan 25 by M/V chloe candies with submersibles, M/V sanco sword and…2024-07-05
- Survey operations 01 apr thru 15 jun by M/V sanco sword, M/V olympic artemis, M/V fulmar explorer and M/V…2024-03-29
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
56 survey operations listed in force · see all
Record snapshot 2026-10-03 01:43Z; 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.