Surveys
Survey operations in progress until 172059Z may by M/V oceanic vega, M/V mainport pine and M/V aquarius-g in…
Black Sea · HYDROLANT 960/21
What this record establishes
Archived notice · 2021-05-05 12:56Z
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 357/21 041202Z APR 21.. Issued 2021-04-08 12:06Z. 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
- Black 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
- Survey operations in progress until 14 apr 21 by M/V oceanic vega, M/V mainport pine and M/V aquarius-g in…cancelled by this notice
- Cancel HYDROLANT 960/21 and this msglater cancellation notice
- issued
- 2021-04-08 12:06Z
- status
- Archived notice
- self-cancels
- 2021-05-17 22:00Z
- authority
- NAVAREA III 357/21 041202Z APR 21.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Black Sea
- position
- 42.215, 29.785
- vessels
- M/V AQUARIUS G · 8 messagesM/V MAINPORT PINE · 8 messagesM/V OCEANIC VEGA · 63 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BLACK SEA. TURKEY. DNC 10. 1. SURVEY OPERATIONS IN PROGRESS UNTIL 172059Z MAY BY M/V OCEANIC VEGA, M/V MAINPORT PINE AND M/V AQUARIUS-G IN AREA BOUND BY 42-12.08N 029-11.35E, 41-49.90N 029-33.27E, 42-04.88N 030-12.93E, 42-38.37N 030-11.27E, 42-33.70N 029-59.98E, 42-33.58N 029-59.45E, 42-29.23N 029-49.57E, 42-26.23N 029-34.32E, 42-14.30N 029-20.72E. FIVE MILE BERTH REQUESTED. 2. CANCEL HYDROLANT 3430/20. 3. CANCEL THIS MSG 172200Z MAY 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
244 within 180 nm since 1999 · 13 in the last 12 months · 6 listed in force now
99
00
05
10
15
20
25
26
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.
- 1- drilling operations by yildirim rig (imo 9705469, mmsi 271053959), supported by ertugrul bey, aybuke,…2026-09-12
- Survey operations 08 sep thru 01 oct by M/V karadeniz arastirma, M/V barbaros hayreddin pasa and M/V TANUX-1…2026-09-07
- Drilling operations by fatih platform (imo 95037702026-09-03
- Drilling operations by yavuz rig (imo 9503768, mmsi 271046765) supported by osman bey, aybuke, florya,…2026-08-27
- Drilling operations by the kanuni platform (imo 95412032026-08-17
- 1- drilling operations by abdulhamid han rig (imo 97050932026-08-17
Month of issue in the collected archive
J
F
M
A
M
J
J
A
S
O
N
D
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
- Drilling operations by fatih platform (imo 9503770Surveys · 19 nm
- Pipeline operations in progress until 07 oct 26 by M/V mukavemet, M/V oruc rei̇s, M/V dina polaris, M/V…Cable ops · 70.2 nm
- Drilling operations by yavuz rig (imo 9503768, mmsi 271046765) supported by osman bey, aybuke, florya,…Surveys · 72.2 nm
- Pipeline operations 05 jun thru 07 oct by M/V oruc reis, M/V mukavemet, M/V zaganos pasa, M/V denar…Cable ops · 76 nm
- 1- drilling operations by yildirim rig (imo 9705469, mmsi 271053959), supported by ertugrul bey, aybuke,…Surveys · 76.9 nm
- Drilling operations by the kanuni platform (imo 9541203Surveys · 79.8 nm
- 1- drilling operations by abdulhamid han rig (imo 9705093Surveys · 96.4 nm
- Object adrift in vicinity 43-55.10N 030-37.65E at 250923Z sepDebris · 108.8 nm
- Underwater operations 05 jan 25 thru 31 dec 26 in area bound by 44-04.40N 030-34.13E, 44-02.40N 030-30.50E,…Surveys · 110.9 nm
- 1- neptun alpha production platform has been established at the central coordinate point: 44-02.85N 030-35.25EStructures · 115.5 nm
- Hazardous operations 0700Z to 1500Z daily 30 sep and 01 oct in area bound by 44-05.00N 029-08.00E, 44-15.00N…Exercises · 119 nm
Worldwide in the collected sources
54 survey operations listed in force · see all
Record snapshot 2026-09-29 08:42Z; 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.