Cable ops
Seismic survey in progress until 152359Z may by M/V sanco swift towing 12 9000 meter long cables in area…
Eastern North Atlantic · Mauritania · HYDROLANT 133/17
What this record establishes
Archived notice · 2017-03-04 17:03Z
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 II 15/17 131632Z JAN 17.. Issued 2017-01-13 17:50Z. 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
- Eastern North Atlantic · Mauritania. No usable coordinates were parsed; a location-based nearby search is unavailable. Check the original wording for limits and qualifications.
Related notices and cancellation links
- issued
- 2017-01-13 17:50Z
- status
- Archived notice
- self-cancels
- 2017-05-16 00:59Z
- authority
- NAVAREA II 15/17 131632Z JAN 17.
- NAVAREA
- NAVAREA II · named as the source of this relay
- vessel
- M/V SANCO SWIFT · 38 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH ATLANTIC. MAURITANIA. DNC 01. 1. SEISMIC SURVEY IN PROGRESS UNTIL 152359Z MAY BY M/V SANCO SWIFT TOWING 12 9000 METER LONG CABLES IN AREA BETWEEN 19-14N 17-37N AND 018-38W 017-03W. SIX MILE BERTH REQUESTED. 2. CANCEL THIS MSG 160059Z MAY 17.
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.
- Seismic survey
- A survey that maps the rock beneath the seabed with sound pulses from air guns, recorded on streamers kilometres long.
- 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.
- 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.
- 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.
Nearby notices listed in force · within 120 nm
No parsed position is available for this comparison.
Worldwide in the collected sources
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 07:16Z; 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.