Research vessel Marion Dufresne conducts oceanographic survey in Indian Ocean southwest sector offshore Mayotte 24 September to 4 October 2026, requesting vessels give 1 nautical mile wide berth.
Mozambique Channel · NAVAREA 7 267/26
What this record establishes
Listed in force
The latest collected record lists this warning as active. This is the status of the notice, not a live observation of conditions at the location.
- Source and dates
- South African Navy Hydrographic Office NAVAREA VII (South Atlantic / SW Indian Ocean) · SANHO. Issued 2026-09-23 00:00Z. First collected 2026-09-28 06:33Z; last seen in collection 2026-09-28 09:33Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Mozambique Channel. The parsed report position is -12.900, 45.758. 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 Mozambique Channel →
- issued
- 2026-09-23 00:00Z
- status
- Listed in force
- authority
- SANHO
- NAVAREA
- NAVAREA VII
- issued by
- SANHO
- sea
- Mozambique Channel
- position
- -12.900, 45.758
- nearest port
- Moroni · 164 nm
- source
- South African Navy Hydrographic Office NAVAREA VII (South Atlantic / SW Indian Ocean) · first seen 2026-09-28 06:33Z
Original warning text
NAVAREA VII 267 OF 2026 : (23 SEP 26) 1. INDIAN OCEAN - SW SECTOR - OFFSHORE MAYOTTE 2. CHART SAN 1 3. RV MARION DUFRESNE (C/S FNIN) WILL BE CONDUCTING OCEANOGRAPHIC SURVEY FROM 24 SEP - 04 OCT 26 IN THE FOLLOWING AREA 4.A. 12 - 30 S 045 - 17 E B. 13 - 18 S 045 - 17 E C. 13 - 18 S 046 - 14 E D. 12 - 30 S 046 - 14 E 5. ALL VESSELS ARE REQUESTED TO PROVIDE 1NM WIDE BERTH 6. CANCEL THIS MESSAGE AT 050030 UTC 26
Reading this warning
- NAVAREA
- One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
- 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.
Conditions at the position · now
loading…
MET Norway · NOAA WaveWatch III · HYCOM · GEBCO 2020 · model data at the centroid, not an observation
Collected reports in this area · survey operations
24 within 180 nm since 2008 · 2 in the last 12 months · 1 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 24 sep thru 04 oct by M/V marion dufresne in area bound by 12-30.00S 045-17.00E, 13-18.00S…2026-09-23
- Survey operations 20 sep thru 07 oct by M/V fnin in area bound by 12-30.00S 045-17.00E, 13-18.00S…2024-09-20
- Survey operations in progress until 25 sep by M/V marion dufresne in area bound by 12-35.00S 046-10.00E,…2023-09-14
- Survey operation in progress until 24 jul by M/V marion dufrense in area bound by 13-14.00S 045-10.00E,…2022-07-11
- Survey operations in progress until 01 oct by r/v marion dufresne in area bound by 12-24.0S 045-10.0E,…2021-09-23
- Survey operations 02 thru 22 jul by M/V marion in area bound by 12-15S 044-40E, 13-20S 044-40E, 13-20S…2021-07-01
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 2026-09-28 10:16Z; 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.