Nga chart 15887 (0 ed)
The Northwestern Passages · HYDROARC 171/11
What this record establishes
Archived notice · 2011-09-17 00:02Z
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 XVIII 131/11 161054Z SEP 11.. Issued 2011-09-16 11:47Z. 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
- The Northwestern Passages. The parsed report position is 68.496, -100.105. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Nga chart 15888 (0 ed)later cancellation notice
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.
- HYDROARC 167/112011-09-14 · Archived notice
- HYDROARC 171/11 · this notice2011-09-16 · Archived notice
- HYDROARC 178/112011-09-17 · Archived notice
Current notices and reporting history in the The Northwestern Passages →
- issued
- 2011-09-16 11:47Z
- status
- Archived notice
- authority
- NAVAREA XVIII 131/11 161054Z SEP 11.
- NAVAREA
- NAVAREA XVIII · named as the source of this relay
- sea
- The Northwestern Passages
- position
- 68.496, -100.105
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
ARCTIC. CANADA-NORTH COAST. REQUISITE CHANNEL. NGA CHART 15887 (0 ED). 14 METER DEPTH REPORTED IN 68-29.78N 100-06.31W.
Reading this warning
- Chart reference
- The number of the nautical chart on which the reported position lies.
- Shoal / reported depth
- Water shallower than the chart shows — a newly found shoal, a reported depth, or less water than charted.
- 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 · wrecks & obstructions
26 within 180 nm since 2008 · 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.
- Shoals reported in: a. 13.2 meters, 68-25.76N 096-37.35W2022-10-18
- Shoals reported in: a. 31.7 meters, 70-03.31N 097-42.44W2022-09-26
- 14 meter shoal in 68-36.32N 095-21.40W2022-09-08
- 16 meter shoal in 68-19.50N 100-46.86W2022-09-06
- 13.7 meter shoal in 69-01.48N 100-58.36W2021-09-02
- 23.8 meter shoal in 68-58.95N 101-08.32W2021-09-02
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
Worldwide in the collected sources
38 wrecks & obstructions listed in force · see all
Record snapshot 2026-09-29 01:42Z; source collection times vary.
Wrecks
Dangerous wrecks, shoals and submerged obstructions. All current wrecks & obstructions →
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.