Oceanographic operations in progress until further notice by M/V poseidon along trackline joining 38-10N…
Tyrrhenian Sea · HYDROLANT 637/06
What this record establishes
Archived notice · 2006-04-02 16:06Z
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 184/06 311321Z MAR 06.. Issued 2006-03-31 14:32Z. 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
- Tyrrhenian Sea. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROLANT 627/06, operations completedlater cancellation notice
Current notices and reporting history in the Tyrrhenian Sea →
- issued
- 2006-03-31 14:32Z
- status
- Archived notice
- authority
- NAVAREA III 184/06 311321Z MAR 06.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Tyrrhenian Sea
- position
- 38.541, 10.242
- vessel
- M/V POSEIDON · 64 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
OCEANOGRAPHIC OPERATIONS IN PROGRESS UNTIL FURTHER NOTICE BY M/V POSEIDON ALONG TRACKLINE JOINING 38-10N 008-00E, 38-45N 011-00E, 38-40N 012-30E.
Reading this warning
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- Track line joining
- Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
- 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.
Collected reports in this area · survey operations
203 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.
- Survey operations in progress until 30 oct by vessel anteos in 39-19.79N 007-50.60E2024-09-03
- Survey operations in progress until 30 jun by M/V ng driller along trackline joining 39-13.99N 007-49.47E,…2024-04-24
- Survey operations in progress until 30 aug by M/V durable along trackline joining 41-22.68N 006-04.83E,…2024-04-24
- Underwater operations in progress until further notice by M/V joides resolution in: a. 40-11.03N 012-42.49E2024-02-16
- Survey operations in progress until 15 apr by M/V ng driller in: a. 39-13.99N 007-49.48E2024-02-01
- Survey operations 20 aug thru 17 sep by M/V dallaporta in area bound by 40-38.53N 010-05.00E, 41-20.54N…2022-08-18
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
56 survey operations listed in force · see all
Record snapshot 2026-09-28 15:49Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.