Navigational warnings on 2026-09-26
UTC day · today
- issued
- 18
- cancelled
- 6
- in force at end
- 386
- of these still in force
- 4
What this reporting period contains
18 messages have issue dates in this period, and 6 have cancellation dates in it. A cancellation can close a message issued earlier; subtracting these totals does not give a count of new incidents.
Exercises, Surveys tie for the largest recorded count, with 5 messages each.
HYDROLANT accounts for 5 of 18 recorded messages (28%), the largest source series group in this selection.
Separate updates to the same activity count as separate messages. The original records below show what was reported and when.
Issued · by sea
| North Atlantic Ocean | 4 |
| South Atlantic Ocean | 4 |
| The Northwestern Passages | 3 |
| North Pacific Ocean | 3 |
| Gulf of Mexico | 1 |
| Bismarck Sea | 1 |
| Coral Sea | 1 |
HYDROLANT 5 · HYDROARC 3 · HYDROPAC 2 · NAVAREA IV 2 · NAVAREA II 1 · NHC storms 1 · USGS earthquakes 1 · NAVAREA X 1 · NAVAREA XI 1 · NAVAREA XII 1
Issued · 18
- Storms · NAVAREA XII 669/2600:40ZDue to hurricane nolo: 1. the following ports are closed: a. hilo harbor, big island 19-44.00N 155-04.00W
- Exercises · HYDROLANT 1905/2600:53ZHazardous operations 280800Z sep to 122200Z oct in area bound by 29-30.53S 049-05.53W, 29-27.03S 049-32.03W,…South Atlantic · Brazil
- Nav aids · HYDROLANT 1907/2601:13ZRACON at sao tome light 22-02.52S 041-03.17W inoperative until 24 marSouth Atlantic · Brazil
- Nav aids · HYDROLANT 1908/2601:21ZPonta dos meros light 23-13.57S 044-20.83W unlit until 24 marSouth Atlantic · Brazil
- Missiles · NAVAREA IV 936/2609:13ZHazardous rocket launches are scheduled off Florida and in the North Atlantic from 2 to 8 October at 0342–0525 UTC and other times in specified areas.North Atlantic · Florida
- Exercises · NAVAREA XI 430/26in force12:00ZGunnery exercises occur daily from 2300Z to 0900Z from 30 September to 30 October in the North Pacific near Nanpo Shoto within a bounded area.North Pacific, Nanpo Shoto · Gunnery
- Exercises · HYDROPAC 2795/2612:11ZGunnery exercises take place daily from 2300Z to 0900Z, 30 September through 30 October, in a defined area of the North Pacific.North Pacific
- Surveys · HYDROLANT 1911/2612:38ZUnderwater operations 0800Z to 1800Z daily 27 sep thru 11 oct by M/V comando b and M/V prime star in…South Atlantic · Brazil
- Surveys · NAVAREA IV 933/2613:06ZSurvey operations in progress until further notice by M/V island frontier in area bound by 27-14.19N…Gulf of America
- Quakes · USGS-US6000TXTCin force14:08ZA magnitude 5.6 earthquake struck 74 km east-southeast of Kokopo, Papua New Guinea, at depth 58 km on 26 September at 1408 UTC.
- Surveys · HYDROARC 263/2614:38ZScientific mooring established in 68-23.75N 109-59.54W, top float 236 metersCoronation Gulf · Canada
- Exercises · NAVAREA II 339/26in force16:00ZA firing exercise is under way within 20 miles of Cap Blanc, near Delta 23-35N 017-00W, and vessels should navigate with caution in the restricted area.Cap Blanc
- Exercises · HYDROLANT 1913/2616:29ZHazardous operations 280001Z to 302359Z sep in area bound by 23-35.00N 017-00.00W, 23-35.08N 017-21.75W,…North Atlantic · Western Sahara
- Storms · NHC-AL07202621:00ZPotential Tropical Cyclone Gonzalo is in the Atlantic near 19.3 north 23.3 west with 35 knot winds, 1005 millibar pressure, moving north-northwest at 7 knots.Atlantic
- Other · NAVAREA X 106/26in force22:22ZSpecial purpose vessel Layla is recovering cables along a route from 14-45.98S 159-08.93E to 20-40.48S 155-22.64E and requests a 2 nautical mile clearance.
- Cable ops · HYDROPAC 2798/2622:44ZCable operations are underway until further notice in the Coral Sea by motor vessel Layla, which requests a 2-mile berth along its route.Coral Sea
- Surveys · HYDROARC 265/2623:17ZScientific mooring established in in 68-55.72N 105-48.26W, least depth 20 metersDeese Strait · Canada
- Surveys · HYDROARC 266/2623:44ZScientific mooring established in 68-23.73N 110-00.91W, least depth 19 metersCoronation Gulf · Canada
Cancelled · 6
- Exercises · HYDROLANT 1892/2600:53ZHazardous operations off Brazil from 28 September to 12 October in an area near 29-27S 049-32W to 31-24S 050-19W.South Atlantic · Brazil
- Nav aids · HYDROLANT 657/2601:13ZRadar beacon at Cabo Sao Tome light is off air until 28 Sep.South Atlantic · Brazil
- Nav aids · HYDROLANT 638/2601:21ZPonta dos Meros light at 23-13.57S 044-20.83W is unlit until 26 September; cancel advisories.South Atlantic · Brazil
- Missiles · NAVAREA XI 429/2612:21ZJapan cancels notice of a possible North Korean ballistic missile in the Japan Sea, East China Sea and North Pacific, and cancels messages 0418, 0419, 0420 and 0421/26.Japan Sea, East China Sea and North Pacific, Japan
- Quakes · USGS-US6000TX3M14:41ZA magnitude 5.7 earthquake struck 180 km northwest of Hihifo, Tonga, at a depth of 10 km on 26 September at 1441 UTC.
- Surveys · HYDROARC 257/2623:17ZA scientific mooring is established in Deese Strait, Canada at 68-55.72N 105-48.26W with a top float at 127 meters.Deese Strait · Canada
Not for navigation. Counts include only warnings we display; ongoing search-and-rescue traffic is excluded until 30 days after it closes.