Debris

Odas buoy K4 adrift in vicinity 55-24.4N 011-46.4W at 100800Z mar

North Atlantic Ocean · HYDROLANT 921/20

What this record establishes

Archived notice · 2020-03-11 16:27Z

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 I 36/20 100830Z MAR 20.. Issued 2020-03-10 09:41Z. 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 55.407, -11.773. 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

These reports were linked by category and sea, with positions within 30 nautical miles and issue dates within 30 days of another report's recorded in-force span. Links can extend through other members, so the full group can cover a larger area or period. Proximity does not confirm that they describe one incident.

  1. HYDROLANT 730/202020-02-27 · Archived notice
  2. HYDROLANT 788/202020-03-02 · Archived notice
  3. HYDROLANT 921/20 · this notice2020-03-10 · Archived notice
  4. HYDROLANT 937/202020-03-11 · Archived notice
Compare all 4 notices, changes and original texts →

Current notices and reporting history in the North Atlantic Ocean →

issued
2020-03-10 09:41Z
status
Archived notice
self-cancels
2020-03-13 09:41Z
authority
NAVAREA I 36/20 100830Z MAR 20.
NAVAREA
NAVAREA I · named as the source of this relay
sea
North Atlantic Ocean
position
55.407, -11.773
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH ATLANTIC.
DNC 19.
1. ODAS BUOY K4 ADRIFT IN VICINITY
   55-24.4N 011-46.4W AT 100800Z MAR.
2. CANCEL THIS MSG 130941Z MAR 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.
Off station / missing buoy
A buoy that is not in its charted position — dragged, damaged, missing or removed.
Adrift
Loose and moving with wind and current — a vessel, container, buoy, log or anything else no longer secured.
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.
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.
CANCEL THIS MSG
The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Collected reports in this area · drifting objects

43 within 180 nm since 2002 · 0 in the last 12 months · 0 listed in force now

02
05
10
15
20

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.

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

No other collected notice is currently listed in force within this radius. This does not establish safe conditions.

Worldwide in the collected sources

3 drifting objects listed in force · see all

Record snapshot 2026-09-26 12:38Z; source collection times vary.

Debris

Logs, buoys, mooring gear and other objects adrift. All current drifting objects →

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.