Icebergs

North american ice service (nais) iceberg bulletin 180001Z jul

Davis Strait · NAVAREA IV 608/21

What this record establishes

Archived notice · 2021-07-19 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 171832Z JUL 21.. Issued 2021-07-17 18:37Z. 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
Davis Strait. 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 Davis Strait →

issued
2021-07-17 18:37Z
status
Archived notice
self-cancels
2021-07-19 00:01Z
authority
NAIS 171832Z JUL 21.
NAVAREA
NAVAREA IV
issued by
NAIS
sea
Davis Strait
position
60.014, -49.997
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 180001Z JUL.
2. ICEBERG LIMIT ALONG TRACKLINE JOINING
   51-33N 055-26W, 52-00N 053-50W,
   55-15N 053-30W.
3. ESTIMATED ICEBERG LIMIT ALONG
   TRACKLINE JOINING
   55-15N 053-30W, 59-00N 058-00W,
   59-55N 051-40W, 58-40N 046-50W,
   58-45N 042-00W, 63-20N 037-20W,
   64-50N 027-50W.
4. WESTERN ICEBERG LIMIT ALONG TRACKLINE
   JOINING
   51-52N 056-10W, 51-34N 055-54W.
5. SEA ICE LIMIT ALONG TRACKLINES
   JOINING:
   A. 59-50N 069-36W, 60-30N 067-42W,
      63-28N 073-35W, 63-47N 072-28W.
   B. 62-25N 041-52W, 61-26N 041-29W,
      61-19N 041-48W, 61-24N 042-23W.
   C. 60-06N 043-04W, 60-07N 043-00W,
      59-52N 042-54W, 59-52N 043-02W,
      60-02N 043-08W.
   D. 61-36N 049-16W, 61-33N 049-23W,
      61-39N 049-42W, 61-51N 049-46W,
      61-53N 049-39W, 61-45N 049-28W.
6. MOST RECENT RECONNAISSANCE:
   INTERIOR SATELLITE PASS 16 JUL 21.
7. NOTE THE SIGNIFICANT REDUCTION
   OF THE ICEBERG LIMIT SINCE 170001Z JUL
   BULLETIN DUE TO PREDICTED DETERIORATION.
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 190001Z JUL 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

1127 within 180 nm since 2002 · 25 in the last 12 months · 1 listed in force now

02
05
10
15
20
25
26

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

Worldwide in the collected sources

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

Record snapshot 2026-10-02 01:48Z; 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.