Survey operations in progress until further notice by M/V western trident towing 9000 meter long cable in…
Mozambique Channel · HYDROPAC 3283/16
What this record establishes
Archived notice · 2016-11-26 09:49Z
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 261/16 260643Z OCT 16.. Issued 2016-10-26 10:20Z. 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.
Related notices and cancellation links
- Survey operations in progress until further notice by M/V western trident towing 9000 meter long cable in…cancelled by this notice
- Cancel HYDROPAC 3283/16 and this msglater cancellation notice
Current notices and reporting history in the Mozambique Channel →
- issued
- 2016-10-26 10:20Z
- status
- Archived notice
- authority
- NAVAREA VII 261/16 260643Z OCT 16.
- NAVAREA
- NAVAREA VII · named as the source of this relay
- sea
- Mozambique Channel
- position
- -17.336, 40.163
- vessel
- M/V WESTERN TRIDENT · 92 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
MOZAMBIQUE CHANNEL. MOZAMBIQUE. DNC 02. 1. SURVEY OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V WESTERN TRIDENT TOWING 9000 METER LONG CABLE IN AREA BOUND BY 16-31S 039-55E, 17-33S 041-00E, 18-10S 040-25E, 17-06S 039-19E. EIGHT MILE BERTH REQUESTED. 2. CANCEL HYDROPAC 2935/16.
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.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- Towed array / streamer
- Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
- Tow / towing
- A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
Collected reports in this area · survey operations
11 within 180 nm since 2003 · 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.
- Survey operations by M/V pourquoi pas 17 feb thru 28 mar in area bound by 15-21S 042-31E, 16-51S 043-24E,…2021-02-19
- Survey operations by M/V pourquoi pas 17 feb thru 28 mar in area bound by 15-36S 042-53E, 16-55S 043-41E,…2021-02-16
- Survey operations in progress until further notice by M/V oceanic endeavour towing 5.5 mile long cable in…2017-10-10
- Survey operations in progress until further notice by M/V western trident towing 9000 meter long cable in…2016-09-26
- Survey operations in progress until further notice by M/V wg amundsen towing 9000 meter long cable in area…2016-02-29
- Survey operations in progress until further notice by M/V western trident towing 9000 meter long cable in…2016-02-18
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 01:55Z; 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.