Survey operations in progress until 30 apr 2023 by M/V sw mikkelsen and M/V sw gallien in area bound by…
Gulf of Mexico · NAVAREA IV 1343/22
What this record establishes
Archived notice · 2023-04-22 17:24Z
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) · SW MIKKELSEN 0/22 121401Z DEC 22.. Issued 2022-12-12 14:46Z. 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 map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel NAVAREA IV 1343/22 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Gulf of Mexico →
- issued
- 2022-12-12 14:46Z
- status
- Archived notice
- self-cancels
- 2023-05-01 00:01Z
- authority
- SW MIKKELSEN 0/22 121401Z DEC 22.
- NAVAREA
- NAVAREA IV
- issued by
- SW MIKKELSEN
- sea
- Gulf of Mexico
- position
- 27.092, -90.689
- vessels
- M/V SW GALLIEN · 3 messagesM/V SW MIKKELSEN · 3 messages
- 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. SURVEY OPERATIONS IN PROGRESS UNTIL 30 APR 2023 BY M/V SW MIKKELSEN AND M/V SW GALLIEN IN AREA BOUND BY 27-26.61N 091-19.24W, 26-32.33N 091-19.24W, 26-31.54N 090-07.41W, 27-43.58N 090-06.54W, 27-44.28N 090-32.14W. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 010001Z MAY 23.
Reading this warning
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- 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.
- 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.
Collected reports in this area · survey operations
46 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 2026-10-01 21:18Z; 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.