Survey operations in progress until 18 nov by M/V aegaeo a. 13 nov in area bound by 40-36.42N 022-54.25E,…
Aegean Sea · HYDROLANT 3522/20
What this record establishes
Archived notice · 2020-11-15 12:44Z
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 1529/20 130001Z NOV 20.. Issued 2020-11-13 00:35Z. 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
- Aegean Sea. The parsed report position is 40.610, 24.258. 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
- Underwater operations in progress until 19 nov by M/V aegaeo a. 15 nov in 39-53.48N 025-15.05Elater cancellation notice
- issued
- 2020-11-13 00:35Z
- status
- Archived notice
- authority
- NAVAREA III 1529/20 130001Z NOV 20.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Aegean Sea
- position
- 40.610, 24.258
- vessel
- M/V AEGAEO A · 2 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
AEGEAN SEA.
DNC 09.
1. SURVEY OPERATIONS IN PROGRESS UNTIL 18 NOV BY
M/V AEGAEO
A. 13 NOV IN AREA BOUND BY
40-36.42N 022-54.25E, 40-32.15N 022-57.08E,
40-28.16N 022-43.05E, 40-22.01N 022-43.08E,
40-04.01N 023-28.35E, 40-05.95N 023-59.50E.
B. 14 NOV IN AREA BOUND BY
40-29.00N 023-49.98E, 40-45.00N 023-53.00E,
40-57.22N 024-31.82E, 40-50.00N 023-43.00E,
40-58.98N 025-56.97E, 40-49.96N 025-56.01E.
C. 15 NOV IN
39-53.48N 025-15.05E.
D. 16 NOV ALONG TRACKLINE JOINING
39-04.76N 026-29.36E, 38-09.88N 025-19.11E.
E. 17 NOV ALONG TRACKLINE JOINING
36-54.83N 025-37.25E, 37-38.83N 023-15.32E.
F. 18 NOV ALONG TRACKLINE JOINING
37-58.28N 023-25.86E, 38-01.10N 023-33.45E.
WIDE BERTH REQUESTED.
2. CANCEL THIS MSG 19 NOV 20.
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.
- 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.
- Track line joining
- Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- 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
86 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 14 jun by M/V tcg cesme in areas bound by a. 38-55.93N 025-24.97E,…2022-05-28
- Survey operations 23 mar thru 15 apr by M/V tubitak marmara and M/V tubitak mam in area bound by 40-03.20N…2021-03-22
- Survey operations 18 feb thru 02 mar by M/V tcg cesme in area bound by 40-00.94N 024-52.91E, 39-40.83N…2021-02-16
- Underwater operations by M/V ievoli ivory: a. 14 feb along trackline joining 37-44.9N 023-24.3E, 37-42.6N…2021-02-13
- Survey operations 21 dec until further notice by M/V aigaio in: a. 38-01.05N 023-33.27E2020-12-19
- Underwater operations in progress until 19 nov by M/V aegaeo a. 15 nov in 39-53.48N 025-15.05E2020-11-15
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
50 survey operations listed in force · see all
Record snapshot 2026-09-24 23:00Z; 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.