Underwater operations 22 thru 30 may by M/V poseidon along trackline joining 29-15N 015-40W, 31-00N 013-00W,…
North Atlantic Ocean · HYDROLANT 852/08
What this record establishes
Archived notice · 2008-05-29 13:51Z
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 158/08 191631Z MAY 08.. Issued 2008-05-19 19:02Z. 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
- North Atlantic Ocean. 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 852/08, operations completedlater cancellation notice
Current notices and reporting history in the North Atlantic Ocean →
- issued
- 2008-05-19 19:02Z
- status
- Archived notice
- authority
- NAVAREA II 158/08 191631Z MAY 08.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- North Atlantic Ocean
- position
- 33.848, -12.439
- 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
1. UNDERWATER OPERATIONS 22 THRU 30 MAY BY M/V POSEIDON ALONG TRACKLINE JOINING 29-15N 015-40W, 31-00N 013-00W, 33-00N 012-45W, 38-00N 010-30W, 39-20N 010-45W. 2. CANCEL THIS MSG 31 MAY.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · survey operations
20 within 180 nm since 2003 · 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 further notice by M/V sarmiento de gamboa towing 300 meter long cable…2022-06-15
- Survey operations 150100Z to 190001 jun by M/V sarmiento de gamboa towing 300 meter long cable along…2022-06-13
- Survey operations 25 jul until further notice by M/V urbano monti along trackline joining 33-35.9N…2021-07-24
- Survey operations 01 thru 20 oct by M/V sarmiento de gamboa in area bound by 38-00N 015-00W, 34-00N 015-00W,…2019-09-27
- Survey operations in progress until further notice by M/V kronprins haakon along trackline joining 31-37N…2019-05-11
- Survey operations in progress until 22 sep by M/V sarmiento de gamboa in area bound by 40-28N 013-30W,…2018-08-26
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
55 survey operations listed in force · see all
Record snapshot 2026-10-02 06:27Z; 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.