Survey operations 160600Z to 200900Z may by M/V aigaio in area between 36-50.5N 36-49.5N and 021-37.5E…
Ionian Sea · HYDROLANT 1535/18
What this record establishes
Archived notice · 2018-05-20 10:00Z
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 416/18 161732Z MAY 18.. Issued 2018-05-16 18:08Z. 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 map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
Related notices and cancellation links
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2018-05-16 06:00Z | 2018-05-20 09:00Z | — | 99 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2018-05-16 18:08Z
- status
- Archived notice
- self-cancels
- 2018-05-20 10:00Z
- authority
- NAVAREA III 416/18 161732Z MAY 18.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Ionian Sea
- position
- 36.844, 21.595
- vessel
- M/V AIGAIO · 21 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
IONIAN SEA.
GREECE.
DNC 09.
1. SURVEY OPERATIONS 160600Z TO 200900Z MAY BY
M/V AIGAIO IN AREA BETWEEN
36-50.5N 36-49.5N AND 021-37.5E 021-39.0E.
2. SURVEY OPERATIONS BY CABLESHIP ANTONIO MEUCCI:
A. 17 MAY ALONG TRACKLINE BETWEEN
36-51.9N 021-35.2E TO 36-49.5N 021-35.8E.
B. 18 AND 19 MAY ALONG TRACKLINE BETWEEN
36-50.5N 021-35.5E AND 36-50.6N 021-36.6E.
WIDE BERTH REQUESTED.
3. CANCEL HYDROLANT 1518/18.
4. CANCEL THIS MSG 201000Z MAY 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.
- Cable operations
- A ship is laying, burying or repairing a submarine cable, usually along a stated route.
- 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.
- 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 · cable & pipeline work
79 within 180 nm since 1998 · 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.
- Cable operations in progress until further notice by cableship normand pacific along trackline joining…2021-02-14
- Cable operations 03 feb until further notice by cableship normand pacific in 37-18.08N 023-43.64E2021-02-03
- Cable operations in progress until further notice by M/V isaac newton along trackline joining 36-03.05N…2021-01-29
- Cable operations in progress until further notice by cableship normand pacific in 36-22.13N 023-05.25E2020-12-14
- Cable operations in progress until further notice by cableship normand pacific in 36-20.13N 023-07.54E wide…2020-11-26
- Underwater operations in progress until further notice by cableship atalanti along trackline joining…2020-11-25
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
24 cable & pipeline work listed in force · see all
Record snapshot 2026-10-02 02:48Z; source collection times vary.
Cable ops
Cable laying, pipeline and seismic operations. All current cable & pipeline work →
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.