150 square kilometer pumice raft from volcanic activity adrift reported in vicinity 18-56S 176-21W at…
South Pacific Ocean · HYDROPAC 2780/19
What this record establishes
Archived notice · 2019-08-29 22:03Z
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 XIV 108/19 270056Z AUG 19.. Issued 2019-08-27 01:16Z. 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
- South Pacific Ocean. The parsed report position is -18.933, -176.350. 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
- Discolored water with submarine volcanic activity reported in vicinity 18-18S 174-24W at 142230Z aug 19cancelled by this notice
- Cancel HYDROPAC 2780/19 and this msglater cancellation notice
Current notices and reporting history in the South Pacific Ocean →
- issued
- 2019-08-27 01:16Z
- status
- Archived notice
- authority
- NAVAREA XIV 108/19 270056Z AUG 19.
- NAVAREA
- NAVAREA XIV · named as the source of this relay
- sea
- South Pacific Ocean
- position
- -18.933, -176.350
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
SOUTH PACIFIC. TONGA. DNC 06. 1. 150 SQUARE KILOMETER PUMICE RAFT FROM VOLCANIC ACTIVITY ADRIFT REPORTED IN VICINITY 18-56S 176-21W AT 262350Z AUG 19. 2. CANCEL HYDROPAC 2631/19.
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.
- Pumice
- Light volcanic rock floating in rafts after a submarine eruption; it can clog engine cooling intakes.
- Volcanic activity
- An erupting or restless volcano near or under the sea, with a keep-clear radius around it.
- Adrift
- Loose and moving with wind and current — a vessel, container, buoy, log or anything else no longer secured.
- 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.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
Collected reports in this area · drifting objects
1 within 180 nm since 2019 · 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.
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
3 drifting objects listed in force · see all
Record snapshot 2026-10-01 18:12Z; source collection times vary.
Debris
Logs, buoys, mooring gear and other objects adrift. All current drifting objects →
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.