Survey operations 222101Z dec to 152059Z jun 21 by M/V orucreis, M/V ataman and M/V cengizhan in area bound…
Mediterranean Sea - Eastern Basin · HYDROLANT 3989/20
What this record establishes
Archived notice · 2021-06-15 21:59Z
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 1716/20 231306Z DEC 20.. Issued 2020-12-28 11:27Z. 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 - Eastern 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
Current notices and reporting history in the Mediterranean Sea - Eastern Basin →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2020-12-22 21:01Z | 2021-06-15 20:59Z | — | 4199 h 58 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2020-12-28 11:27Z
- status
- Archived notice
- self-cancels
- 2021-06-15 21:59Z
- authority
- NAVAREA III 1716/20 231306Z DEC 20.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Eastern Basin
- position
- 36.353, 31.111
- vessels
- M/V ATAMAN · 27 messagesM/V CENGIZHAN · 2 messagesM/V ORUCREIS · 3 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN MEDITERRANEAN SEA. TURKEY. DNC 10. 1. SURVEY OPERATIONS 222101Z DEC TO 152059Z JUN 21 BY M/V ORUCREIS, M/V ATAMAN AND M/V CENGIZHAN IN AREA BOUND BY 36-27.43N 030-34.37E, 35-53.85N 031-03.72E, 36-16.17N 031-38.63E, 36-47.82N 031-10.38E. SIX MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 3957/20. 3. CANCEL THIS MSG 152159Z JUN 21.
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.
- 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.
- 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
154 within 180 nm since 2000 · 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.
- Scientific research and underwater operations by vessels r/v harvest chief, denar pathfinder, denar echo and…2026-10-01
- Underwater operations 01 thru 25 oct by M/V oruc reis, M/V denar echo, M/V kirici and M/V denar pathfinder…2026-09-30
- Survey operations by M/V BILIM-2 in progress until 04 jul along tracklines joining: a. 36-04.51N 033-13.95E,…2022-06-30
- Survey operations in progress until 21 jan by M/V nautical geo in area bound by 34-20.64N 031-26.41E,…2022-01-15
- Survey operations in progress until 11 jan 22 by M/V nautical geo in area bound by 33-56.5N 032-25.0E,…2022-01-04
- Survey operations in progress until 11 jan 22 by M/V odin finder in area bound by 33-56.5N 032-25.0E,…2021-12-23
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
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-01 13:46Z; 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.