Icebergs

North american ice service (nais) iceberg bulletin 240001Z apr

Labrador Sea · NAVAREA IV 455/23

What this record establishes

Archived notice · 2023-04-25 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 231901Z APR 23.. Issued 2023-04-23 19:11Z. 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 1344/222022-12-12 · Archived notice
  2. NAVAREA IV 1346/222022-12-13 · Archived notice
  3. NAVAREA IV 1350/222022-12-14 · Archived notice
  4. NAVAREA IV 1353/222022-12-15 · Archived notice
  5. NAVAREA IV 1360/222022-12-16 · Archived notice
  6. NAVAREA IV 1366/222022-12-17 · Archived notice
Compare all 213 notices, changes and original texts →

Current notices and reporting history in the Labrador Sea →

issued
2023-04-23 19:11Z
status
Archived notice
self-cancels
2023-04-25 00:01Z
authority
NAIS 0/23 231901Z APR 23.
NAVAREA
NAVAREA IV
issued by
NAIS
sea
Labrador Sea
position
55.151, -51.065
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 240001Z APR.
2. ICEBERG LIMIT ALONG TRACKLINE JOINING
   46-55N 055-25W, 45-10N 053-10W,
   45-40N 049-55W, 47-40N 047-30W,
   51-25N 048-00W, 57-55N 054-55W.
3. ESTIMATED ICEBERG LIMIT ALONG
   TRACKLINE JOINING
   57-55N 054-55W, 56-30N 049-45W,
   57-55N 042-10W, 63-40N 037-30W,
   65-25N 029-15W.
4. WESTERN ICEBERG LIMIT ALONG TRACKLINE
   JOINING
   50-17N 062-13W, 47-38N 059-16W.
5. SEA ICE LIMIT ALONG TRACKLINES
   JOINING:
   A. 46-43N 060-21W, 47-04N 059-53W,
      47-28N 060-50W, 46-42N 062-30W,
      49-03N 064-06W, 49-04N 064-35W.
   B. 49-51N 067-01W, 50-05N 066-05W,
      49-56N 060-14W, 50-45N 057-49W,
      48-33N 059-14W.
   C. 47-32N 052-37W, 49-38N 052-06W,
      50-54N 053-26W, 52-48N 052-03W,
      55-35N 052-40W, 57-20N 057-18W,
      58-03N 057-42W, 60-02N 059-02W,
      61-24N 060-44W, 63-22N 057-57W.
   D. 62-25N 041-17W, 61-24N 041-14W,
      59-57N 041-59W, 59-23N 043-11W,
      59-20N 045-14W, 60-19N 051-05W,
      60-57N 051-10W, 61-09N 049-34W,
      60-43N 048-15W.
6. MOST RECENT RECONNAISSANCE:
   INTERIOR ICEBERG FLIGHT 21 APR 23.
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 250001Z APR 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

2178 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
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 2026-09-28 04:08Z; 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.