Exercises

Gunnery exercises 232100Z to 251200Z sep, alternate 252100Z to 271200Z sep in area bound by 75-54N 137-00E,…

Laptev Sea · HYDROARC 240/21

What this record establishes

Archived notice · 2021-09-27 13:00Z

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) · NAVAREA XXI 48/21 160631Z SEP 21.. Issued 2021-09-20 12:30Z. 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
Laptev Sea. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the Laptev Sea →

Activity windows · 2 in this warning

opens (UTC)closes (UTC)locallength
2021-09-23 21:00Z2021-09-25 12:00Z—39 h
2021-09-25 21:00Z2021-09-27 12:00Z—39 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued
2021-09-20 12:30Z
status
Archived notice
self-cancels
2021-09-27 13:00Z
authority
NAVAREA XXI 48/21 160631Z SEP 21.
NAVAREA
NAVAREA XXI · named as the source of this relay
sea
Laptev Sea
position
75.847, 137.261
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

LAPTEV SEA.
RUSSIA.
DNC 27.
1. GUNNERY EXERCISES 232100Z TO 251200Z SEP,
   ALTERNATE 252100Z TO 271200Z SEP
   IN AREA BOUND BY
   75-54N 137-00E, 75-54N 137-26E,
   75-48N 137-36E, 75-48N 137-00E.
2. CANCEL HYDROARC 238/21.
3. CANCEL THIS MSG 271300Z SEP 21.

Reading this warning

DNC (Digital Nautical Chart)
A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
Gunnery and live firing
Naval or coastal guns firing into a sea area for practice, at stated times.
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.
Area bound by
Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
HYDROARC
The U.S. long-range warning series for the Arctic Ocean.
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 · military exercises

6 within 180 nm since 2018 · 0 in the last 12 months · 0 listed in force now

18
20
21

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

9 military exercises listed in force · see all

Record snapshot 2026-10-03 00:58Z; source collection times vary.

Exercises

Gunnery, firing and naval exercise areas. All current military exercises →

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.