Nga chart 15888 (0 ed)
The Northwestern Passages · HYDROARC 178/11
What this record establishes
Archived notice · 2012-07-01 08:50Z
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 135/11 162315Z SEP 11.. Issued 2011-09-17 00:02Z. 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 68.495, -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 15887 (0 ed)cancelled by this notice
- Cancel HYDROARC 144/11, 178/11 and this msglater 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 171/112011-09-16 · Archived notice
- HYDROARC 178/11 · this notice2011-09-17 · Archived notice
Current notices and reporting history in the The Northwestern Passages →
- issued
- 2011-09-17 00:02Z
- status
- Archived notice
- authority
- NAVAREA XVIII 135/11 162315Z SEP 11.
- NAVAREA
- NAVAREA XVIII · named as the source of this relay
- sea
- The Northwestern Passages
- position
- 68.495, -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 15888 (0 ED). 1. 14 METER DEPTH REPORTED IN 68-29.72N 100-06.31W. 2. CANCEL HYDROARC 171/11.
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.
- 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.
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 2026-10-02 15:07Z; 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.