Underwater operations 180800Z to 181200Z aug in area bound by 10-23.05N 075-32.90W, 10-22.80N 075-32.90W,…
Caribbean Sea · NAVAREA IV 756/20
What this record establishes
Archived notice · 2020-08-18 13:00Z
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) · COLOMBIA 138/20 150057Z AUG 20.. Issued 2020-08-15 01:07Z. 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
- Caribbean 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.
Current notices and reporting history in the Caribbean Sea →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2020-08-18 08:00Z | 2020-08-18 12:00Z | — | 4 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2020-08-15 01:07Z
- status
- Archived notice
- self-cancels
- 2020-08-18 13:00Z
- authority
- COLOMBIA 138/20 150057Z AUG 20.
- NAVAREA
- NAVAREA IV
- issued by
- COLOMBIA
- sea
- Caribbean Sea
- position
- 10.381, -75.552
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
CARIBBEAN SEA. COLOMBIA. 1. UNDERWATER OPERATIONS 180800Z TO 181200Z AUG IN AREA BOUND BY 10-23.05N 075-32.90W, 10-22.80N 075-32.90W, 10-22.80N 075-33.25W, 10-22.80N 075-33.55W. 2. CANCEL THIS MSG 181300Z AUG 20.
Reading this warning
- Underwater operations
- Divers or remotely operated vehicles are working below a vessel that cannot easily move out of the way.
- 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.
- 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
28 within 180 nm since 2006 · 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.
- Underwater operations in progress until further notice by M/V noble discoverer in 11-32.66N 073-34.52W2024-04-19
- Survey operations in progress until 21 may in area bound by 09-43.00N 076-00.00W, 09-43.00N 075-34.00W,…2024-04-13
- Survey operations in progress until 25 feb 24 by M/V gyre in area bound by 12-13.70N 073-58.63W, 11-59.00N…2023-09-02
- Underwater operations in progress until further notice by dredge leila in areas bound by: a. 07-56.05N…2023-07-01
- Underwater operations in progress until further notice by c/s it intrepid in 11-16.70N 074-59.20W2023-02-01
- Survey operations in progress until further notice by M/V maria s. merian in 11-07.84N 074-51.64W2022-10-30
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 2026-09-28 08:40Z; 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.