Geophysical survey 20 mar thru 20 apr by M/V western pride towing 3500 meter long cable in area bound by…
Ionian Sea · HYDROLANT 539/99
What this record establishes
Archived notice · 1999-04-21 00:00Z
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). Issued 1999-03-19 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
- Ionian Sea. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
- issued
- 1999-03-19 17:50Z
- status
- Archived notice
- sea
- Ionian Sea
- position
- 39.745, 16.820
- vessel
- M/V WESTERN PRIDE · 94 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. GEOPHYSICAL SURVEY 20 MAR THRU 20 APR BY M/V WESTERN PRIDE TOWING 3500 METER LONG CABLE IN AREA BOUND BY 39-57N 016-37E, 39-44N 017-00E, 39-36N 016-55E, 39-36N 016-48E. 2. CANCEL THIS MSG 21 APR.
Reading this warning
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · tows
6 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.
- Geophysical operations 18 jan thru 15 feb by M/V western wave towing 6000 meter long cable in area bound by…2001-01-17
- Geophysical operations 05 thru 07 jan by M/V fres towing 400 meter long cable along trackline between…2001-01-04
- Geophysical operations 260700Z to 262259Z dec by M/V fres towing 400 meter long cable vicinity of trackline…2000-12-25
- Geophysical operations 21 dec thru 20 jan by M/V western wave towing 6000 meter long cable in area bound by…2000-12-20
- Geophysical operations 15 thru 22 dec by M/V fres towing 400 meter long cable vicinity of trackline joining…2000-12-14
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
0 tows listed in force · see all
Record snapshot 2026-10-03 09:31Z; source collection times vary.
Towing
Vessels under tow with long or unlit tow lines. All current tows →
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.