Nav aids

GPS jamming exercises 0800Z to 1500Z daily 15 and 16 jun in area bound by 42-25.00N 005-30.00E, 42-25.00N…

Mediterranean Sea - Western Basin · HYDROLANT 1586/21

What this record establishes

Archived notice · 2021-06-16 16:00Z

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 III 515/21 131242Z JUN 21.. Issued 2021-06-13 13:46Z. 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: Mediterranean Sea - Western Basin. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.

Current notices and reporting history in the Mediterranean Sea - Western Basin →

issued: 2021-06-13 13:46Z
status: Archived notice
self-cancels: 2021-06-16 16:00Z
authority: NAVAREA III 515/21 131242Z JUN 21.
NAVAREA: NAVAREA III · named as the source of this relay
sea: Mediterranean Sea - Western Basin
position: 41.947, 6.120
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

WESTERN MEDITERRANEAN SEA.
FRANCE.
DNC 08.
1. GPS JAMMING EXERCISES 0800Z TO 1500Z DAILY
   15 AND 16 JUN IN AREA BOUND BY
   42-25.00N 005-30.00E, 42-25.00N 006-40.00E,
   41-21.54N 006-40.00E, 41-20.03N 006-34.19E,
   41-40.00N 005-30.00E.
2. CANCEL THIS MSG 161600Z JUN 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.
GNSS / GPS: Satellite positioning — GPS and other systems — and the testing, jamming and interference that make it unreliable in an area.
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.
CANCEL THIS MSG: The warning's own expiry: a line telling the reader when the message cancels itself.
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.

All warning terms →

Collected reports in this area · aids-to-navigation notices

110 within 180 nm since 1997 · 0 in the last 12 months · 0 listed in force now

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.

Marker buoy established in 41-35.66N 004-07.02E2022-11-17
NAVTEX station la maddalena (r) 41-13.22N 009-23.57E off air2021-10-05
Capo caccia light 40-33.6N 008-09.8E unlit2021-08-01
Capo mannu light 40-02.1N 008-22.7E unlit unil 182359Z may2021-05-14
Capo mannu light 40-02.1N 008-22.7E unlit2021-04-29
Capo mannu light 40-02.1N 008-22.7E unlit until 28 apr2021-04-26

Month of issue in the collected archive

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

138 aids-to-navigation notices listed in force · see all

Record snapshot 2026-09-29 15:54Z; source collection times vary.

Nav aids

Lights extinguished, buoys off station, RACON/NAVTEX outages. All current aids-to-navigation notices →

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.