Submarine research operations during daylight hours daily 22 oct thru 04 nov by M/V natsushima and…
Philippine Sea · HYDROPAC 1748/05
What this record establishes
Archived notice · 2005-11-06 00:00Z
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 XI 505/05 170800Z OCT 05.. Issued 2005-10-17 09:23Z. 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
- Philippine Sea. 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 Philippine Sea →
- issued
- 2005-10-17 09:23Z
- status
- Archived notice
- authority
- NAVAREA XI 505/05 170800Z OCT 05.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Philippine Sea
- position
- 21.605, 143.633
- vessel
- M/V NATSUSHIMA · 39 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. SUBMARINE RESEARCH OPERATIONS DURING DAYLIGHT HOURS
DAILY 22 OCT THRU 04 NOV BY M/V NATSUSHIMA AND
SUBMERSIBLE HYPER-DOLPHIN:
A. WITHIN FIVE MILES OF 21-28.5N 144-03.5E
B. WITHIN FIVE MILES OF 21-19.0N 144-11.0E
C. WITHIN FIVE MILES OF 21-36.0N 143-38.0E
D. IN AREA BOUND BY 23-00.0N 142-26.0E,
23-00.0N 142-18.0E, 23-10.0N 142-17.0E,
23-10.0N 142-26.0E.
2. CANCEL THIS MSG 06 NOV.
Reading this warning
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · survey operations
8 within 180 nm since 2003 · 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.
- Survey operations 02 thru 09 oct by M/V yokosuka with submersible shinkai 6500 in areas within two miles of:…2024-10-01
- Underwater operations 22 thru 26 nov, alternate 27 nov thru 01 dec by M/V ocean guardian in area bound by…2022-11-21
- Underwater operations in progress until 02 nov by unmanned seven meter vessel in vicinity of trackline…2018-10-26
- Underwater operations 28 jul thru 03 aug by M/V natsushima with submersible within: a. three miles of…2010-07-23
- Underwater operations 27 may thru 07 jun by M/V yokosuka with submersible in areas: a. between 26-30N 30-00N…2009-05-23
- Survey operations 15 may thru 06 jun by M/V kairei towing 5500 meter long cable in areas: a. between 27-10N…2006-05-10
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
55 survey operations listed in force · see all
Record snapshot 2026-10-02 07:44Z; 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.