Icebergs

North american ice service (nais) iceberg bulletin 110001Z dec

Labrador Sea · NAVAREA IV 1427/23

What this record establishes

Archived notice · 2023-12-12 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 101901Z DEC 23.. Issued 2023-12-10 19:22Z. 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 1407/232023-12-04 · 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
2023-12-10 19:22Z
status
Archived notice
self-cancels
2023-12-12 00:01Z
authority
NAIS 0/23 101901Z DEC 23.
NAVAREA
NAVAREA IV
issued by
NAIS
sea
Labrador Sea
position
57.607, -53.990
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 110001Z DEC.
2. ICEBERG LIMIT ALONG TRACKLINE JOINING
   52-40N 055-48W, 53-45N 053-00W,
   56-00N 053-00W, 58-30N 056-30W.
3. ESTIMATED ICEBERG LIMIT ALONG
   TRACKLINE JOINING
   58-30N 056-30W, 60-50N 056-30W,
   58-50N 045-40W, 59-10N 041-10W,
   62-30N 038-15W, 65-10N 027-35W.
4. SEA ICE LIMIT ALONG TRACKLINES
   JOINING:
   A. 45-48N 063-08W, 46-08N 063-14W.
   B. 48-45N 067-51W, 49-51N 066-24W,
      49-35N 063-46W.
   C. 46-30N 063-21W, 47-42N 064-13W,
      48-27N 064-05W, 48-45N 064-10W.
   D. 49-52N 063-43W, 50-02N 063-22W,
      49-52N 061-28W, 50-01N 059-41W,
      51-18N 057-46W, 50-58N 057-22W,
      49-28N 058-09W.
   E. 50-39N 056-07W, 51-02N 055-05W,
      53-48N 055-18W, 55-59N 059-47W,
      60-31N 064-04W, 60-51N 064-45W,
      59-26N 066-34W, 59-30N 067-52W,
      60-26N 067-37W, 61-36N 066-20W,
      61-13N 064-52W, 61-31N 063-30W,
      63-57N 058-08W, 64-17N 057-52W.
5. MOST RECENT RECONNAISSANCE:
   SOUTHWESTERN LIMIT ICEBERG FLIGHT 04 DEC 23.
6. 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.
7. FOR MORE REPORTING INFORMATION OR TO
   DOWNLOAD SHAPEFILES AND WEEKLY PREDICTIONS,
   GO TO WWW.NAVCEN.USCG.GOV/IIP.
8. CANCEL THIS MSG 120001Z 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

1089 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

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

Record snapshot 2026-09-29 20:11Z; 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.