Survey operations 110400Z to 180500Z nov by M/V atlantis with submersible alvin in area within 110 miles of…
North Atlantic Ocean · NAVAREA IV 1020/21
What this record establishes
Archived notice · 2021-11-18 06:00Z
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) · NATIONAL DEEP SUBMERGENCE FACILITY 091318Z NOV 21.. Issued 2021-11-09 13:24Z. 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
- North Atlantic Ocean. The parsed report position is 19.633, -66.050 with a 110.0 nm radius. 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
Current notices and reporting history in the North Atlantic Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2021-11-11 04:00Z | 2021-11-18 05:00Z | — | 169 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2021-11-09 13:24Z
- status
- Archived notice
- self-cancels
- 2021-11-18 06:00Z
- authority
- NATIONAL DEEP SUBMERGENCE FACILITY 091318Z NOV 21.
- NAVAREA
- NAVAREA IV
- issued by
- NATIONAL DEEP SUBMERGENCE FACILITY
- sea
- North Atlantic Ocean
- position
- 19.633, -66.050 · r 110.0 nm
- vessel
- M/V ATLANTIS · 37 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN NORTH ATLANTIC. PUERTO RICO. 1. SURVEY OPERATIONS 110400Z TO 180500Z NOV BY M/V ATLANTIS WITH SUBMERSIBLE ALVIN IN AREA WITHIN 110 MILES OF 19-38N 066-03W. WIDE BERTH REQUESTED. 2. CANCEL NAVAREA IV 990/21. 3. CANCEL THIS MSG 180600Z NOV 21.
Reading this warning
- 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.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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.
- NAVAREA
- One of the 21 ocean areas of the World-Wide Navigational Warning Service, each with a coordinator that broadcasts long-range warnings.
- 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
6 within 180 nm since 2015 · 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.
- 600 meter orange buoyed scientific float established until 272200Z jun in area bound by 18-16.93N…2023-06-27
- Massachusetts to puerto rico2022-07-04
- Underwater operations by r/v atlantis 0400Z to 0359Z daily: a. 06 and 07 jul in area within five miles of…2022-07-03
- Massachusetts to puerto rico2022-07-01
- Bottom scientific moorings, extending 1000 to 4000 meters above sea floor, established until 04 jul in: a.…2015-02-02
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
56 survey operations listed in force · see all
Record snapshot 2026-09-28 09:08Z; 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.