Survey operations 262100Z jun until further notice by M/V philia in area bound by 40-13.51N 023-16.47E,…
Aegean Sea · HYDROLANT 2043/20
What this record establishes
Archived notice · 2020-07-01 00:15Z
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 949/20 251223Z JUN 20.. Issued 2020-06-25 12:47Z. 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 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
- Underwater operations 24 jun until further notice by M/V philia in area bound by 40-55.48N 024-24.72E,…cancelled by this notice
- Cancel HYDROLANT 2043/20 and this msglater cancellation notice
- issued
- 2020-06-25 12:47Z
- status
- Archived notice
- authority
- NAVAREA III 949/20 251223Z JUN 20.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Aegean Sea
- position
- 40.078, 22.958
- vessel
- M/V PHILIA · 4 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 262100Z JUN UNTIL FURTHER NOTICE BY M/V PHILIA IN AREA BOUND BY 40-13.51N 023-16.47E, 39-54.11N 023-17.10E, 39-42.59N 023-04.03E, 40-00.46N 022-38.49E, 40-25.35N 022-38.0E. WIDE BERTH REQUESTED. 2. CANCEL HYDROLANT 2025/20.
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.
- 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.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- 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.
Collected reports in this area · survey operations
67 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 by M/V ievoli ivory: a. in progress along trackline joining 37-16.97N 023-44.72E,…2020-12-17
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 2026-10-03 22:35Z; 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.