North Pacific Ocean

IHO sea area 57 · -180° to 180° E, 0° to 58° N

in force: 35
last 12 months: 23
since 1993: 9,508
categories: 15

In force now · 35

NAVAREA XII 548/26 · Exercises2026-08-13
Hazardous operations occur off California in the North Pacific from August 18-19 and 20-21, with the notice valid until August 26.
HYDROPAC 2320/26 · Missiles2026-08-12
The warning for missile operations near Kuril Islands, North Pacific, covers 1400Z to 1000Z daily 16-22 August and is cancelled at 231100Z August.
NAVAREA XI 369/26 · Missiles2026-08-12
Missile firing in North Pacific near Hokkaido, daily from August 16 to 22, from 1400Z to 1000Z, in a defined area.
NAVAREA XII 552/26 · Exercises2026-08-12
Hazardous operations are underway August 19 to 20 within two miles of 32-35.87N 117-10.87W.
HYDROPAC 2296/26 · Nav aids2026-08-10
The US Coast Guard remote communication facility near Guam at 13-29N 144-50E has unreliable high-frequency radio capabilities.
NAVAREA XII 540/26 · Missiles2026-08-10
Space debris hazard operations occur daily from August 13 to 26 in two North Pacific areas.
HYDROPAC 2282/26 · Cable ops2026-08-10
Cable operations by cableship Aniek are in progress until further notice along a trackline in the North Pacific near coordinates 45-07.40N 163-31.90E to 38-48.00N 147-55.50E. Wide berth requested.
NAVAREA XI 364/26 · Cable ops2026-08-10
Submarine cable recovery works by motor vessel Aniek in northwestern North Pacific from 092200Z Aug until further notice near coordinates 45-07N 163-32E to 38-48N 147-56E.
NAVAREA XII 551/26 · Missiles2026-08-08
Rocket launching hazardous operations in North Pacific off California from August 19 to 25, with daily alternate windows, in two areas near 34-29N 120-29W and 29-13N 121-31W.
NAVAREA XII 539/26 · Missiles2026-08-04
Hazardous rocket launching operations take place off California in multiple areas from August 15 to 22, with alternate dates.
NAVAREA XII 523/26 · Cable ops2026-08-01
Cable operations are underway by M/V Grace in the North Pacific along a trackline; a two-mile berth is requested.
HYDROPAC 2152/26 · Exercises2026-07-27
Gunnery exercises daily 2300-0900 Zulu, July 31 to August 30, North Pacific area bounded by 28-15N 146-30E, 25-25N 147-38E, 25-00N 145-36E, 27-55N 145-58E.
NAVAREA XI 342/26 · Exercises2026-07-27
Gunnery exercise in North Pacific near Nanpo Shoto daily from 31 July to 30 August, 2300Z to 0900Z, in a bounded area.
HYDROPAC 2124/26 · Surveys2026-07-24
Submersible survey operations are in areas near 22-40N 154-30E and 22-30N 153-45E in the North Pacific from July 25 to August 15; wide berth requested.
NAVAREA XII 512/26 · Exercises2026-07-23
Hazardous operations are scheduled off the California coast in the North Pacific from August 1 to September 1.
NAVAREA XII 510/26 · Exercises2026-07-23
Hazardous operations are underway off the coast of California from August 1 to September 1.
NAVAREA XII 511/26 · Exercises2026-07-23
Hazardous operations are occurring from August 1 to September 1 in the North Pacific off California.
HYDROPAC 2100/26 · Cable ops2026-07-22
Cable operations are underway until further notice by cableship Subaru near a trackline joining 36-44.60N 140-45.20E to 35-04.90N 156-51.80E off Japan; wide berth requested.
NAVAREA XI 328/26 · Nav aids2026-07-21
The Number 1 lighted buoy at Malakal Harbor in the West Carolines, North Pacific, at 07-19.17N 134-27.17E, is missing.
HYDROPAC 2039/26 · Volcanic2026-07-16
Discolored water with increased likelihood of submarine volcanic activity is reported in Northern Mariana Islands vicinity at 20-26N 145-01E on July 16 at 0013Z.
NAVAREA XI 322/26 · Volcanic2026-07-16
Discoloured water reported near 20-26.0N 145-01.0E on 16 July at 0013Z; cancels warning 0020/24.
HYDROPAC 1906/26 · Nav aids2026-07-03
The United States Coast Guard's remote communication facility at Guam (13-29N 144-50E) has unreliable broadcast and communication services.
NAVAREA XII 678/25 · Other2025-10-30
A fish farm has been established in an area off Colombia, from 06-03N to 07-11N and 077-28W to 078-08W; wide berth requested.
HYDROPAC 1819/25 · Wrecks2025-07-17
Depths between 5.4 and 18.8 meters reported at several positions in Marshall Islands, North Pacific.
NAVAREA XII 392/25 · Debris2025-06-24
Motor vessel Morning Midas is reported to have sunk in the North Pacific at 45-16.88N 179-14.13W; vessels should report oil sheens or debris to USCG.
HYDROPAC 1650/25 · Debris2025-06-24
Vessel Morning Midas sank in North Pacific at 45-16.88N 179-14.13W; navigate with caution and report debris or oil sheens.
NAVAREA XII 354/25 · Nav aids2025-06-13
Messaging services are unreliable at Coast Guard remote communication facilities at Point Reyes, Honolulu, Kodiak, Astoria, and Cambria.
NAVAREA XII 338/25 · Nav aids2025-06-07
The US Coast Guard remote communication facility at Astoria, Oregon (46-10.00N 123-49.00W), is off the air.
NAVAREA XII 208/25 · Nav aids2025-04-06
Punta Soldado light at 03-48.50N 077-10.80W is discontinued.
NAVAREA XII 862/24 · Cable ops2024-10-28
Cable operations are in progress in the eastern North Pacific near Kiribati until further notice; a 100-meter berth is requested.
NAVAREA XII 441/24 · Nav aids2024-06-18
Morro Santo Domingo light at 28-14.37N 114-06.18W is unlit.
NAVAREA XII 93/23 · Missiles2023-02-28
Periodic missile firing operations by Pacific Missile Range Facility, Barking Sands, Kauai, Hawaii, occur in Whiskey 188; vessels should contact on channel 16.
NAVAREA XII 721/22 · Nav aids2022-09-27
In El Salvador, mooring buoys at 13-35.23N 089-51.10W are unlit.
NAVAREA XII 720/22 · Nav aids2022-09-27
Buoy 16 at Puerto de La Union, El Salvador, at 13-20.36N 087-48.99W is unlit.
NAVAREA XII 243/22 · Nav aids2022-04-15
Coronado Island South Light at 32-23.5N 117-14.5W is unlit; warning 159/21 is now cancelled.

Longest in force

By year

By month (all years)

By category · since 1997

Exercises	4,583	48%
Missiles	1,733	18%
Other	822	9%
Nav aids	750	8%
Towing	531	6%
Derelicts	474	5%
Cable ops	217	2%
Surveys	149	2%
Containers	113	1%
Debris	80	1%
Wrecks	37	0%
Volcanic	13	0%
Mines	4	0%
Piracy	1	0%
Icebergs	1	0%

Archive · 9,473 cancelled

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.