Icebergs

North american ice service (nais) iceberg bulletin 050001Z dec

Labrador Sea · NAVAREA IV 1407/23

What this record establishes

Archived notice · 2023-12-06 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 0/23 042103Z DEC 23.. Issued 2023-12-04 21:09Z. 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.

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. NAVAREA IV 1407/23 · this notice2023-12-04 · Archived notice
  2. NAVAREA IV 1413/232023-12-05 · Archived notice
  3. NAVAREA IV 1415/232023-12-06 · Archived notice
  4. NAVAREA IV 1418/232023-12-07 · Archived notice
  5. NAVAREA IV 1421/232023-12-08 · Archived notice
  6. NAVAREA IV 1425/232023-12-09 · Archived notice
Compare all 9 notices, changes and original texts →

Current notices and reporting history in the Labrador Sea →

issued
2023-12-04 21:09Z
status
Archived notice
self-cancels
2023-12-06 00:01Z
authority
NAIS 0/23 042103Z DEC 23.
NAVAREA
NAVAREA IV
issued by
NAIS
sea
Labrador Sea
position
57.976, -53.387
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 050001Z DEC.
2. ICEBERG LIMIT ALONG TRACKLINE JOINING
   51-33N 055-31W, 52-00N 050-00W,
   54-30N 049-15W, 58-30N 056-30W.
3. ESTIMATED ICEBERG LIMIT ALONG
   TRACKLINE JOINING
   58-30N 056-30W, 60-25N 053-05W,
   58-40N 043-20W, 59-10N 041-10W,
   62-30N 038-15W, 65-10N 027-40W.
4. WESTERN ICEBERG LIMIT ALONG TRACKLINE
   JOINING
   51-41N 056-31W, 51-31N 056-03W.
5. SEA ICE LIMIT ALONG TRACKLINES
   JOINING:
   A. 48-12N 069-06W, 48-01N 069-28W,
      47-46N 069-43W.
   B. 50-03N 066-44W, 49-59N 061-44W,
      50-01N 059-52W, 51-25N 057-37W,
      51-25N 057-37W.
   C. 52-13N 055-38W, 53-48N 055-18W,
      55-59N 059-47W, 60-31N 064-04W,
      60-54N 064-29W, 59-09N 067-36W,
      60-31N 068-48W, 61-24N 066-57W,
      61-09N 064-55W, 61-31N 063-30W,
      62-56N 060-16W, 65-09N 057-46W.
6. NOTE THE SIGNIFICANT REDUCTION OF THE
   ICEBERG LIMIT SINCE 040001Z DEC BULLETIN
   DUE TO PREDICTED DETERIORATION.
7. MOST RECENT RECONNAISSANCE:
   INTERIOR SATELLITE PASS 03 DEC 23.
8. 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.
9. FOR MORE REPORTING INFORMATION OR TO
   DOWNLOAD SHAPEFILES AND WEEKLY PREDICTIONS,
   GO TO WWW.NAVCEN.USCG.GOV/IIP.
10. CANCEL THIS MSG 060001Z DEC 23.

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

1203 within 180 nm since 2012 · 0 in the last 12 months · 0 listed in force now

12
15
20
24

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

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

Record snapshot 2026-10-02 17:50Z; 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.