Seismic survey in progress until further notice by M/V northern explorer towing 12250 meter long cable in…
Gulf of Mexico · NAVAREA IV 632/15
What this record establishes
Archived notice · 2015-08-04 22:23Z
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) · NORTHERN EXPLORER 012234Z AUG 15.. Issued 2015-08-02 04:55Z. 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
Current notices and reporting history in the Gulf of Mexico →
- issued
- 2015-08-02 04:55Z
- status
- Archived notice
- authority
- NORTHERN EXPLORER 012234Z AUG 15.
- NAVAREA
- NAVAREA IV
- issued by
- NORTHERN EXPLORER
- sea
- Gulf of Mexico
- position
- 20.647, -94.376
- vessel
- M/V NORTHERN EXPLORER · 69 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF MEXICO. BAY OF CAMPECHE. 1. SEISMIC SURVEY IN PROGRESS UNTIL FURTHER NOTICE BY M/V NORTHERN EXPLORER TOWING 12250 METER LONG CABLE IN AREA BOUND BY 22-07.0N 097-30.7W, 22-21.3N 093-30.0W, 19-45.7N 091-23.2W, 18-28.6N 094-44.2W. EIGHT MILE BERTH REQUESTED. 2. CANCEL NAVAREA IV 558/15.
Reading this warning
- Seismic survey
- A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
- 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.
- NAVAREA
- One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
Collected reports in this area · cable & pipeline work
74 within 180 nm since 2009 · 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.
- Cable operations in progress until 13 dec by M/V polarcus adira, M/V polarcus naila, M/V oceanic champion,…2019-08-12
- Cable operations in progress until 132359Z aug by M/V polarcus adira and M/V polarcus naila 9000 meter long…2019-08-03
- Seismic survey in progress until further notice by M/V wg tasman, M/V geco topaz, M/V wg cook and M/V geco…2016-12-15
- Seismic survey in progress until 30 apr 17 by M/V western neptune, M/V wg magellan, M/V geco diamond and M/V…2016-11-05
- Seismic survey in progress until further notice by M/V wg tasman, M/V geco topaz, M/V wg cook, and M/V geco…2016-10-13
- Seismic survey in progress until 10 oct by M/V western neptune, M/V wg columbus, M/V geco diamond, M/V geco…2016-09-12
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
23 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 16:18Z; source collection times vary.
Cable ops
Cable laying, pipeline and seismic operations. All current cable & pipeline work →
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.