Seismic survey in progress until 20 may by M/V bgp challenger towing cables in area bound by 36-43.0N…
Mediterranean Sea - Western Basin · HYDROLANT 698/11
What this record establishes
Archived notice · 2011-05-21 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 III 201/11 251202Z APR 11.. Issued 2011-04-25 13:45Z. 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
- Mediterranean Sea - Western Basin. 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
- Cancel HYDROLANT 698/11 dtg 251336Z apr and this msg, msg promulgated in errorlater cancellation notice
Current notices and reporting history in the Mediterranean Sea - Western Basin →
- issued
- 2011-04-25 13:45Z
- status
- Archived notice
- authority
- NAVAREA III 201/11 251202Z APR 11.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Western Basin
- position
- 36.620, 0.207
- vessel
- M/V BGP CHALLENGER · 82 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN MEDITERRANEAN SEA. ALGERIA. 1. SEISMIC SURVEY IN PROGRESS UNTIL 20 MAY BY M/V BGP CHALLENGER TOWING CABLES IN AREA BOUND BY 36-43.0N 000-48.3W, 37-14.5N 000-13.0E, 37-12.9N 001-18.3E, 36-33.5N 001-18.3E, 36-27.7N 000-54.3E, 36-10.1N 000-13.7E, 35-49.2N 000-02.0W, 35-51.2N 000-15.7W, 35-55.4N 000-21.6W, 35-52.0N 000-40.6W. SIX MILE BERTH REQUESTED. 2. CANCEL THIS MSG 21 MAY.
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.
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · cable & pipeline work
26 within 180 nm since 1999 · 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 221400Z to 291400Z apr by cableship raymond croze in area bound by 37-06.00N 000-21.80W,…2021-04-21
- Cable operations 130700Z to 152359Z apr by M/V rebecca along trackline joining 37-10.00N 000-06.20E,…2021-04-11
- Cable operations 091500Z to 222300Z mar by M/V rebecca in area bound by 36-26.1N 001-17.2W, 37-01.2N…2021-03-05
- Cable operations in progress until 092300Z apr by cableship raymond croze in area bound by 37-33.7N…2020-03-21
- Cable operations in progress until further notice by cableship intrepid in vicinity of trackline joining…2018-05-23
- Cable operations in progress until further notice in area bound by 36-47.4N 002-49.7E, 36-48.0N 002-50.0E,…2018-05-10
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
23 cable & pipeline work listed in force · see all
Record snapshot 2026-10-03 08:30Z; 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.