Seismic survey in progress until 01 may by M/V bgp challenger towing cables in area bound by 37-05.0N…
Mediterranean Sea - Western Basin · HYDROLANT 593/11
What this record establishes
Archived notice · 2011-04-25 13:30Z
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 169/11 091149Z APR 11.. Issued 2011-04-09 13:24Z. 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 593/11 and this msglater cancellation notice
Current notices and reporting history in the Mediterranean Sea - Western Basin →
- issued
- 2011-04-09 13:24Z
- status
- Archived notice
- authority
- NAVAREA III 169/11 091149Z APR 11.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Western Basin
- position
- 37.202, 7.032
- 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 01 MAY BY M/V BGP CHALLENGER TOWING CABLES IN AREA BOUND BY 37-05.0N 004-45.0E, 37-45.0N 008-25.0E, 36-56.3N 008-38.4E, 36-53.4N 004-45.0E. SIX MILE BERTH REQUESTED. 2. CANCEL THIS MSG 02 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
98 within 180 nm since 1999 · 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.
- Cable operations 281200Z sep until further notice by M/V maasvliet along tracklines joining: a. 39-32.67N…2026-09-28
- Cable operations by MV maasvliet (IMO-9996915) days 281200 UTC sep 26 until further notice in the segments:…2026-09-28
- Cable operations 28 aug thru 10 sep by cableship cable vigilance in area within one mile of 37-47.30N…2023-08-27
- Cable operations 070001Z to 222359Z may by cableship raymond croze in area within ten miles of 38-28.70N…2022-05-05
- Underwater operations in progress until 152359Z sep by cableship raymond croze in area bound by 38-11.80N…2021-09-05
- Underwater operations 011400Z sep until further notice by cableship raymond croze in area bound by 38-11.80N…2021-08-30
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 2026-10-03 03:41Z; 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.