Survey operations by M/V maria s. merian: 1. 100530Z to 102300Z mar in: a. 36-36.0N 021-48.0E
Ionian Sea · HYDROLANT 860/18
What this record establishes
Archived notice · 2018-03-11 14:46Z
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 242/18 101616Z MAR 18.. Issued 2018-03-10 16:57Z. 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 parsed report position is 38.280, 20.234. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
Activity windows · 3 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-03-10 05:30Z | 2018-03-10 23:00Z | — | 17 h 30 |
| 2018-03-10 23:00Z | 2018-03-12 13:00Z | — | 38 h |
| 2018-03-12 13:00Z | 2018-03-13 02:00Z | — | 13 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2018-03-10 16:57Z
- status
- Archived notice
- self-cancels
- 2018-03-13 03:00Z
- authority
- NAVAREA III 242/18 101616Z MAR 18.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Ionian Sea
- position
- 38.280, 20.234
- vessel
- M/V MARIA S MERIAN · 25 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN MEDITERRANEAN SEA. IONIAN SEA. STRAIT OF OTRANTO. DNC 09. SURVEY OPERATIONS BY M/V MARIA S. MERIAN: 1. 100530Z TO 102300Z MAR IN: A. 36-36.0N 021-48.0E. B. 36-06.0N 021-54.0E. C. 36-06.0N 021-20.0E. 2. 102300Z TO 121300Z MAR IN: A. 36-30.0N 021-20.0E. B. 36-58.5N 020-51.6E. C. 37-22.5N 020-20.0E. D. 37-57.6N 020-15.0E. E. 38-23.9N 020-01.5E. F. 38-50.1N 019-48.0E. G. 39-15.0N 019-38.0E. 3. 121300Z TO 130200Z MAR IN: A. 39-40.2N 019-27.9E. B. 39-56.0N 019-17.0E. C. 40-10.2N 019-19.8E. D. 40-10.2N 019-10.2E. E. 40-10.2N 019-00.0E. WIDE BERTH REQUESTED. 4. CANCEL HYDROLANT 846/18. 5. CANCEL THIS MSG 130300Z MAR 18.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROLANT
- The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
- 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
78 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 12 apr by vessel M/V l atalante in area bound by 38-21.00N 024-00.00E,…2024-04-03
- Underwater operations 28 aug thru 03 sep by M/V janus II in area bound by 40-58.27N 018-47.52E, 40-48.67N…2023-08-27
- Underwater operations 28 aug thru 03 sep in area bound by 40-58.27N 018-47.52E, 40-48.67N 018-24.72E,…2023-08-25
- Survey operations in progress until 15 jan by M/V sw cook towing one 12000 meter long cable in area bound by…2022-01-14
- Survey operations 12 jan thru 25 feb by M/V sw cook towing one 1200 meter long cable in area bound by…2022-01-11
- Underwater operations in progress until 07 jan by M/V edda flora with submersible along trackline joining…2022-01-04
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 2026-10-02 00:00Z; 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.