Sea Ledger, June 2026

2026-06-01 to 2026-06-30 · gap

issued
94
warning-days in force
20,739
in force at month end
715
sea × type cells
205

Coverage note: the NGA archive ends 2024-05 and live collection began 2026-08-17. Warnings issued in between are here only if they were still in force when collection started, so this period is under-counted.

baseline: same month, previous 5 years — not available for this month (needs three fully collected reference months)

By type

typeissuedwarning-daysin force at end
Quakes42156.53
Nav aids168,231.5286
Spills1430011
Surveys123,238.8114
Cable ops41,709.960
Exercises21,539.653
Other193232
Mines1162.16
Wrecks12,668.289
Icebergs160.43
Restricted01204
Missiles051017
Storms0602
Derelicts01806
Towing0602
Structures0602
Debris0903
War risk0602
Volcanic051017
Ordnance0903

By sea and type · 200 cells, most issued first

cellissuedwarning-daysvs 5 y
Quakes · North Pacific Ocean1131.5
Quakes · Celebes Sea927
Surveys · North Atlantic Oceanlong running8458.6
Quakes · South Pacific Ocean517.9
Spills · North Atlantic Oceanlong running460
Spills · Gulf of Mexico449
Quakes · Philippine Sea412
Nav aids · Caribbean Sealong running32,186.5
Nav aids · Great Australian Bight335.9
Spills · The Coastal Waters of Southeast Alaska and British Columbia331
Quakes · South Atlantic Ocean39
Surveys · Black Sealong running2141
Cable ops · Tasman Sea233
Nav aids · Singapore Strait219.6
Exercises · Mediterranean Sea - Western Basin29.6
Quakes · Caribbean Sea26
Nav aids · North Atlantic Oceanlong running1967.3
Nav aids · South Atlantic Oceanlong running1904
Surveys · South Atlantic Oceanlong running1403.9
Wrecks · North Atlantic Oceanlong running1268.2
Cable ops · North Atlantic Oceanlong running1240.5
Nav aids · Bering Sealong running1151.2
Nav aids · Persian Gulflong running1150.4
Nav aids · Arabian Sealong running1130.3
Surveys · Gulf of Mexicolong running175.3
Cable ops · Black Sea156.4
Nav aids · The Coastal Waters of Southeast Alaska and British Columbialong running144.2
Spills · North Pacific Ocean142
Other · Great Australian Bight132
Nav aids · Sea of Okhotsklong running131.6
Spills · Beaufort Sea114
Spills · Gulf of Alaska114
Mines · Persian Gulf112.1
Nav aids · Gulf of Guinea110.5
Quakes · Banda Sea13
Quakes · Gulf of Mexico13
Quakes · Gulf of Tomini13
Quakes · Japan Sea13
Quakes · Southern Ocean13
Quakes · Tasman Sea13
Quakes · Tyrrhenian Sea13
Icebergs · Southern Ocean10.4
Quakes · Gulf of California10.2
Nav aids · South Pacific Oceanlong running0630
Exercises · North Pacific Oceanlong running0480
Cable ops · Arabian Sea0450
Surveys · Indian Oceanlong running0450
Volcanic · Philippine Sealong running0450
Nav aids · North Pacific Oceanlong running0420
Nav aids · Gulf of Mexicolong running0360
Wrecks · Arabian Sealong running0330
Wrecks · Persian Gulflong running0270
Wrecks · South Atlantic Oceanlong running0270
Wrecks · The Northwestern Passageslong running0270
Wrecks · Caribbean Sealong running0240
Surveys · The Northwestern Passageslong running0210
Exercises · Bay of Bengal0180
Nav aids · Celtic Sealong running0180
Nav aids · South China Sealong running0180
Surveys · Arabian Sea0150
Nav aids · Beaufort Sealong running0150
Mines · Black Sealong running0150
Nav aids · Indian Oceanlong running0150
Nav aids · Irish Sea and St. George's Channellong running0150
Missiles · North Atlantic Oceanlong running0150
Cable ops · Persian Gulflong running0150
Surveys · Persian Gulflong running0150
Wrecks · South China Sealong running0150
Surveys · South Pacific Oceanlong running0150
Nav aids · Andaman or Burma Sealong running0120
Exercises · Arabian Sea0120
Surveys · Arctic Oceanlong running0120
Exercises · Black Sealong running0120
Other · Caribbean Sealong running0120
Cable ops · Celtic Sealong running0120
Nav aids · English Channellong running0120
Nav aids · Gulf of Alaskalong running0120
Other · Indian Oceanlong running0120
Other · North Atlantic Oceanlong running0120
Missiles · North Pacific Oceanlong running0120
Missiles · South Pacific Oceanlong running0120
Nav aids · Bay of Biscaylong running090
Ordnance · Bay of Biscaylong running090
Spills · Caribbean Sealong running090
Nav aids · Coral Sealong running090
Exercises · Gulf of Californialong running090
Nav aids · Hudson Straitlong running090
Cable ops · Indian Oceanlong running090
Nav aids · Laccadive Sealong running090
Wrecks · Laccadive Sealong running090
Exercises · North Atlantic Oceanlong running090
Other · North Pacific Oceanlong running090
Wrecks · North Pacific Oceanlong running090
Other · Persian Gulflong running090
Cable ops · Philippine Sealong running090
Exercises · Philippine Sea090
Nav aids · Philippine Sealong running090
Wrecks · South Pacific Oceanlong running090
Surveys · Timor Sealong running090
Exercises · Aegean Sea060
Nav aids · Arafura Sealong running060
Surveys · Bass Straitlong running060
Nav aids · Bay of Bengal060
Wrecks · Bay of Bengallong running060
Other · Bay of Biscaylong running060
Surveys · Bay of Biscaylong running060
Surveys · Bering Sea060
War risk · Black Sealong running060
Exercises · Caribbean Sealong running060
Surveys · Caribbean Sealong running060
Surveys · Chukchi Sealong running060
Wrecks · Coral Sealong running060
Wrecks · Gulf of Guinea060
Wrecks · Gulf of Mexicolong running060
Nav aids · Gulf of Omanlong running060
Missiles · Indian Ocean060
Surveys · Irish Sea and St. George's Channellong running060
Surveys · Kara Sealong running060
Wrecks · Kara Sealong running060
Nav aids · Mediterranean Sea - Eastern Basinlong running060
Debris · North Pacific Oceanlong running060
Towing · North Pacific Oceanlong running060
Volcanic · North Pacific Oceanlong running060
Nav aids · North Sealong running060
Restricted · Persian Gulflong running060
Surveys · Sea of Okhotsk060
Cable ops · South Atlantic Oceanlong running060
Cable ops · South Pacific Oceanlong running060
Cable ops · Sulu Sealong running060
Exercises · Tasman Sea060
Nav aids · Tasman Sealong running060
Other · Adriatic Sea030
Missiles · Aegean Sea030
Exercises · Andaman or Burma Sea030
Surveys · Andaman or Burma Sea030
Other · Arabian Sea030
Wrecks · Arafura Sealong running030
Nav aids · Arctic Oceanlong running030
Cable ops · Bass Strait030
Derelicts · Bass Straitlong running030
Wrecks · Bass Strait030
Other · Bay of Bengallong running030
Surveys · Bay of Bengal030
Debris · Bay of Biscaylong running030
Wrecks · Bay of Biscaylong running030
Other · Beaufort Sealong running030
Surveys · Beaufort Sealong running030
Nav aids · Black Sealong running030
Other · Black Sealong running030
Cable ops · Caribbean Sealong running030
Derelicts · Caribbean Sealong running030
Surveys · Celtic Sealong running030
Quakes · Coral Sealong running030
Other · Davis Strait030
Wrecks · Eastern China Sealong running030
Wrecks · English Channellong running030
Cable ops · Great Australian Bight030
Wrecks · Great Australian Bight030
Nav aids · Gulf of Californialong running030
Cable ops · Gulf of Guinealong running030
Exercises · Gulf of Mexicolong running030
Storms · Gulf of Mexicolong running030
Derelicts · Gulf of Omanlong running030
Wrecks · Gulf of Suezlong running030
Nav aids · Hudson Baylong running030
Wrecks · Hudson Baylong running030
Wrecks · Hudson Strait030
Derelicts · Indian Ocean030
Restricted · Indian Oceanlong running030
Nav aids · Inner Seas off the West Coast of Scotlandlong running030
Exercises · Irish Sea and St. George's Channellong running030
Other · Irish Sea and St. George's Channellong running030
Wrecks · Irish Sea and St. George's Channellong running030
Cable ops · Java Sealong running030
Icebergs · Labrador Sealong running030
Exercises · Laccadive Sea030
Missiles · Laccadive Sea030
Surveys · Laccadive Sealong running030
Cable ops · Ligurian Sealong running030
Cable ops · Makassar Strait030
Surveys · Makassar Strait030
Surveys · Malacca Strait030
Other · Mediterranean Sea - Eastern Basinlong running030
Surveys · Mediterranean Sea - Eastern Basinlong running030
Cable ops · Mediterranean Sea - Western Basinlong running030
Surveys · Mediterranean Sea - Western Basinlong running030
Restricted · Mozambique Channel030
Structures · Mozambique Channellong running030
Derelicts · North Atlantic Oceanlong running030
Cable ops · North Pacific Oceanlong running030
Structures · North Pacific Ocean030
Other · North Sealong running030
Surveys · Norwegian Sealong running030
Storms · Philippine Sea030
Derelicts · Red Sealong running030
Exercises · South Atlantic Oceanlong running030
Icebergs · South Atlantic Oceanlong running030
Cable ops · South China Sealong running030
Surveys · South China Sealong running030
Exercises · South Pacific Ocean030

Cite: seahazards.com Sea Ledger, 2026-06, retrieved 2026-09-03

Not for navigation. Warning-days = days each warning was in force within the month, summed. Only warnings we display are counted; the ratio compares warnings issued with the mean of the reference months.

Sea Ledger, June 2026 — warnings by sea and type · seahazards