Icebergs

North american ice service (nais) iceberg bulletin 120001Z dec

Labrador Sea · NAVAREA IV 1115/21

What this record establishes

Archived notice · 2021-12-13 00:01Z

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) · NAIS 111839Z DEC 21.. Issued 2021-12-11 21:43Z. 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: Labrador Sea. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.

Current notices and reporting history in the Labrador Sea →

issued: 2021-12-11 21:43Z
status: Archived notice
self-cancels: 2021-12-13 00:01Z
authority: NAIS 111839Z DEC 21.
NAVAREA: NAVAREA IV
issued by: NAIS
sea: Labrador Sea
position: 57.317, -54.884
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. NORTH AMERICAN ICE SERVICE (NAIS)
   ICEBERG BULLETIN 120001Z DEC.
2. ICEBERG LIMIT ALONG TRACKLINE JOINING
   51-53N 056-06W, 51-15N 054-30W,
   52-00N 053-00W, 55-00N 052-15W,
   56-30N 055-30W, 58-00N 057-00W.
3. ESTIMATED ICEBERG LIMIT ALONG
   TRACKLINE JOINING
   58-00N 057-00W, 60-50N 060-15W,
   62-05N 053-55W, 59-40N 048-15W,
   58-40N 044-20W, 58-50N 040-50W,
   64-10N 037-20W, 65-00N 029-35W.
4. SEA ICE LIMIT ALONG TRACKLINES
   JOINING:
   A. 49-09N 066-25W, 49-02N 067-44W,
      50-02N 065-41W, 48-46N 062-05W,
      51-17N 057-28W.
   B. 46-28N 062-37W, 46-39N 063-38W,
      47-08N 064-00W, 47-05N 064-41W,
      48-27N 064-07W, 48-45N 064-10W.
   C. 45-41N 062-22W, 45-58N 063-15W,
      45-53N 062-29W, 46-23N 062-06W.
   D. 51-17N 057-28W, 51-25N 057-11W.
   E. 52-27N 055-38W, 53-28N 055-30W,
      54-07N 056-59W, 54-32N 056-51W,
      55-02N 057-53W, 55-38N 059-58W,
      57-18N 061-00W, 59-54N 063-43W,
      60-14N 064-22W.
   F. 60-22N 064-51W, 59-39N 067-27W,
      61-10N 067-07W, 61-03N 064-25W,
      61-22N 063-21W, 62-30N 060-30W,
      63-30N 060-15W, 64-25N 057-51W.
5. NOTE THE SIGNIFICANT REDUCTION OF THE
   ICEBERG LIMIT SINCE 110001Z DEC BULLETIN
   DUE TO PREDICTED DETERIORATION.
6. MOST RECENT RECONNAISSANCE:
   EASTERN LIMIT SATELLITE PASS 11 DEC 21.
7. REPORT POSITION AND TIME OF ANY ICEBERGS
   SEA ICE OR STATIONARY RADAR TARGETS THAT
   MAY LIKELY BE ICE TO THE NEAREST CANADIAN
   COAST GUARD MARINE COMMUNICATIONS AND
   TRAFFIC SERVICE STATION OR
   USING INMARSAT CODE 42.
8. FOR MORE REPORTING INFORMATION OR TO
   DOWNLOAD SHAPEFILES AND WEEKLY PREDICTIONS,
   GO TO WWW.NAVCEN.USCG.GOV/IIP.
9. CANCEL THIS MSG 130001Z DEC 21.

Reading this warning

Icebergs and ice limits: Icebergs, smaller pieces of glacier ice and the published limit of known ice.
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.
Track line joining: Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
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.
Inmarsat-C / SafetyNET: The satellite system that carries NAVAREA warnings to ships at sea, and the terminal number rescue centres give for reports.
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 · iceberg & sea-ice bulletins

882 within 180 nm since 2009 · 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.

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

4 iceberg & sea-ice bulletins listed in force · see all

Record snapshot 2026-10-04 04:50Z; source collection times vary.

Icebergs

Iceberg limits and reported bergs — mostly the North American Ice Service (International Ice Patrol) bulletins in the North Atlantic. All current iceberg & sea-ice bulletins →

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.