Scientific moorings established in the Chukchi Sea off Alaska at two positions: 68-08.94N 166-01.68W and 68-20.82N 166-53.94W.
Chukchi Sea · HYDROARC 155/23
What this record establishes
Cancelled notice · 2026-08-14 18:10Z
This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA XVII 48/23 090718Z AUG 23.. Issued 2023-08-09 08:14Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-08-17 15:50Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Chukchi Sea. The parsed report position is 68.248, -166.464. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
- issued
- 2023-08-09 08:14Z
- status
- Cancelled notice
- authority
- NAVAREA XVII 48/23 090718Z AUG 23.
- NAVAREA
- NAVAREA XVII · named as the source of this relay
- sea
- Chukchi Sea
- position
- 68.248, -166.464
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:41Z
Original warning text
CHUKCHI SEA. ALASKA. DNC 27. SCIENTIFIC MOORINGS ESTABLISHED IN: A. 68-08.94N 166-01.68W. B. 68-20.82N 166-53.94W.
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.
- Scientific mooring
- Instruments anchored to the seabed and held up by floats, sometimes just below the surface, left for months to measure the ocean.
- 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.
Collected reports in this area · survey operations
29 within 180 nm since 2005 · 2 in the last 12 months · 2 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.
- Scientific moorings, at depth 15 meters, established in: a. 65-46.86N 168-34.06W2026-09-17
- Scientific mooring, at depth seven meters, established in 66-19.59N 168-57.01W2026-09-17
- Scientific mooring, at depth seven meters, established in 66-19.56N 168-57.08W2025-07-14
- Scientific moorings, at depth 15 meters, established in: a. 65-46.86N 168-34.07W2025-07-14
- Oceanographic equipment at depth 44 meters, established in 66-38.78N 170-31.82W2023-09-09
- Scientific moorings established: a. A3-21, in 66-19.64N 168-56.99W, at depth 59 meters, top float seven meters2021-07-16
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
56 survey operations listed in force · see all
Record snapshot 2026-10-01 14:05Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
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.