Survey operations in progress until 01 oct by r/v marion dufresne in area bound by 12-24.0S 045-10.0E,…
Mozambique Channel · HYDROPAC 2706/21
What this record establishes
Archived notice · 2021-10-02 00:01Z
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 VII 275/21 232017Z SEP 21.. Issued 2021-09-23 20:26Z. 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
- Mozambique Channel. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Current notices and reporting history in the Mozambique Channel →
- issued
- 2021-09-23 20:26Z
- status
- Archived notice
- authority
- NAVAREA VII 275/21 232017Z SEP 21.
- NAVAREA
- NAVAREA VII · named as the source of this relay
- sea
- Mozambique Channel
- position
- -12.396, 45.742
- vessel
- R/V MARION DUFRESNE · 52 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
MOZAMBIQUE CHANNEL. COMOROS (MAYOTTE). DNC 02. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 01 OCT BY R/V MARION DUFRESNE IN AREA BOUND BY 12-24.0S 045-10.0E, 12-24.0S 046-19.0E, 12-23.5S 046-19.0E, 12-23.5S 045-10.0E. WIDE BERTH REQUESTED. 2. CANCEL THIS MSG 02 OCT 21.
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.
- 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.
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
- NAVAREA VII 267 of 2026 : (23 sep 26) 1. indian ocean - sw sector - offshore mayotte 2. chart san 1 3. rv…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 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
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-09-30 04:07Z; 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.