Sea Ledger, March 2026

2026-03-01 to 2026-03-31 · gap

issued
87
warning-days in force
20,612
in force at month end
689
sea × type cells
194

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
Quakes361353
Nav aids147,875262
Spills1333210
Surveys73,549.4121
Cable ops51,657.157
Wrecks42,596.586
Exercises41,503.352
Other384829
Missiles1535.118
Mines01555
Restricted01244
Icebergs0622
Piracy0311
Derelicts01555
Towing0622
Structures0622
Debris0933
Incidents0933
War risk0622
Storms0311
Volcanic052717
Ordnance0933
Containers0311

By sea and type · 194 cells, most issued first

cellissuedwarning-daysvs 5 y
Quakes · South Pacific Ocean1439.2
Quakes · North Pacific Ocean824.2
Nav aids · South Atlantic Oceanlong running6571
Spills · North Pacific Ocean549
Nav aids · South Pacific Oceanlong running4564.5
Cable ops · Arabian Sea4355
Surveys · Arabian Sea4351.1
Spills · Gulf of Mexico471
Quakes · Coral Sealong running441.6
Surveys · Indian Oceanlong running3501.3
Spills · North Atlantic Oceanlong running374
Quakes · Bering Sea26
Quakes · Eastern China Sea26
Nav aids · North Atlantic Oceanlong running1938.2
Exercises · North Pacific Oceanlong running1469.5
Wrecks · Arabian Sealong running1332.8
Wrecks · South Atlantic Oceanlong running1256.6
Wrecks · North Atlantic Oceanlong running1238.1
Exercises · Bay of Bengal1218.5
Nav aids · Indian Oceanlong running1158.7
Nav aids · Arabian Sealong running1158.3
Other · North Atlantic Oceanlong running1101.3
Exercises · Arabian Sea197.9
Other · North Pacific Oceanlong running196.7
Exercises · Andaman or Burma Sea166.4
Nav aids · Gulf of Omanlong running159.3
Missiles · Indian Ocean139.1
Cable ops · South Pacific Oceanlong running131.1
Other · Adriatic Sea130
Spills · The Coastal Waters of Southeast Alaska and British Columbia114
Quakes · Banda Sea13
Quakes · Caribbean Sea13
Quakes · Indian Ocean13
Quakes · North Atlantic Ocean13
Quakes · Southern Ocean13
Quakes · Tyrrhenian Sea13
Wrecks · Bass Strait12
Nav aids · Caribbean Sealong running02,108
Volcanic · Philippine Sealong running0465
Nav aids · North Pacific Oceanlong running0403
Nav aids · Gulf of Mexicolong running0372
Surveys · South Atlantic Oceanlong running0341
Surveys · North Atlantic Oceanlong running0310
Wrecks · Persian Gulflong running0279
Wrecks · The Northwestern Passageslong running0279
Cable ops · North Atlantic Oceanlong running0248
Surveys · Persian Gulflong running0248
Wrecks · Caribbean Sealong running0217
Surveys · The Northwestern Passageslong running0217
Nav aids · Celtic Sealong running0186
Cable ops · Persian Gulflong running0186
Nav aids · South China Sealong running0186
Surveys · Bay of Bengal0155
Nav aids · Beaufort Sealong running0155
Nav aids · Bering Sealong running0155
Mines · Black Sealong running0155
Nav aids · Irish Sea and St. George's Channellong running0155
Nav aids · Laccadive Sealong running0155
Missiles · North Atlantic Oceanlong running0155
Nav aids · Persian Gulflong running0155
Wrecks · South China Sealong running0155
Surveys · South Pacific Oceanlong running0155
Nav aids · Andaman or Burma Sealong running0124
Surveys · Arctic Oceanlong running0124
Exercises · Black Sealong running0124
Surveys · Black Sealong running0124
Other · Caribbean Sealong running0124
Cable ops · Celtic Sealong running0124
Nav aids · English Channellong running0124
Nav aids · Gulf of Alaskalong running0124
Missiles · South Pacific Oceanlong running0124
Nav aids · Bay of Bengal093
Nav aids · Bay of Biscaylong running093
Ordnance · Bay of Biscaylong running093
Spills · Caribbean Sealong running093
Nav aids · Great Australian Bight093
Exercises · Gulf of Californialong running093
Nav aids · Hudson Straitlong running093
Surveys · Laccadive Sealong running093
Exercises · North Atlantic Oceanlong running093
Missiles · North Pacific Oceanlong running093
Wrecks · North Pacific Oceanlong running093
Other · Persian Gulflong running093
Cable ops · Philippine Sealong running093
Nav aids · Philippine Sealong running093
Wrecks · South Pacific Oceanlong running093
Surveys · Timor Sealong running093
Exercises · Aegean Sea062
Other · Arabian Sea062
Nav aids · Arafura Sealong running062
Surveys · Bass Straitlong running062
Wrecks · Bay of Bengallong running062
Other · Bay of Biscaylong running062
Surveys · Bay of Biscaylong running062
Surveys · Bering Sea062
War risk · Black Sealong running062
Exercises · Caribbean Sealong running062
Surveys · Caribbean Sealong running062
Surveys · Chukchi Sealong running062
Nav aids · Coral Sealong running062
Wrecks · Coral Sealong running062
Surveys · Gulf of Mexicolong running062
Wrecks · Gulf of Mexicolong running062
Cable ops · Indian Oceanlong running062
Other · Indian Oceanlong running062
Surveys · Irish Sea and St. George's Channellong running062
Surveys · Kara Sealong running062
Wrecks · Kara Sealong running062
Wrecks · Laccadive Sealong running062
Nav aids · Mediterranean Sea - Eastern Basinlong running062
Cable ops · North Pacific Oceanlong running062
Debris · North Pacific Ocean062
Towing · North Pacific Oceanlong running062
Volcanic · North Pacific Oceanlong running062
Nav aids · North Sealong running062
Restricted · Persian Gulflong running062
Exercises · Philippine Sea062
Cable ops · South Atlantic Oceanlong running062
Incidents · South China Sea062
Cable ops · Sulu Sealong running062
Nav aids · Tasman Sealong running062
Surveys · Tasman Sealong running062
Wrecks · Tasman Sea062
Missiles · Aegean Sea031
Surveys · Andaman or Burma Sea031
Wrecks · Arafura Sealong running031
Nav aids · Arctic Oceanlong running031
Cable ops · Bass Strait031
Derelicts · Bass Straitlong running031
Cable ops · Bay of Bengal031
Other · Bay of Bengallong running031
Debris · Bay of Biscaylong running031
Wrecks · Bay of Biscaylong running031
Other · Beaufort Sealong running031
Surveys · Beaufort Sealong running031
Cable ops · Black Sea031
Nav aids · Black Sealong running031
Other · Black Sealong running031
Cable ops · Caribbean Sealong running031
Derelicts · Caribbean Sealong running031
Surveys · Celtic Sealong running031
Other · Davis Strait031
Wrecks · Eastern China Sealong running031
Wrecks · English Channellong running031
Missiles · Great Australian Bight031
Nav aids · Gulf of Californialong running031
Cable ops · Gulf of Guinealong running031
Exercises · Gulf of Mexicolong running031
Storms · Gulf of Mexicolong running031
Derelicts · Gulf of Oman031
Wrecks · Gulf of Oman031
Wrecks · Gulf of Suezlong running031
Nav aids · Hudson Baylong running031
Wrecks · Hudson Baylong running031
Wrecks · Hudson Strait031
Restricted · Indian Oceanlong running031
Nav aids · Inner Seas off the West Coast of Scotlandlong running031
Exercises · Irish Sea and St. George's Channellong running031
Other · Irish Sea and St. George's Channellong running031
Wrecks · Irish Sea and St. George's Channellong running031
Exercises · Japan Sea031
Missiles · Japan Sea031
Cable ops · Java Sealong running031
Icebergs · Labrador Sealong running031
Containers · Laccadive Sea031
Exercises · Laccadive Sea031
Cable ops · Ligurian Sealong running031
Cable ops · Makassar Strait031
Surveys · Makassar Strait031
Cable ops · Malacca Strait031
Surveys · Malacca Strait031
Other · Mediterranean Sea - Eastern Basinlong running031
Surveys · Mediterranean Sea - Eastern Basinlong running031
Cable ops · Mediterranean Sea - Western Basinlong running031
Surveys · Mediterranean Sea - Western Basinlong running031
Restricted · Mozambique Channel031
Structures · Mozambique Channellong running031
Derelicts · North Atlantic Oceanlong running031
Structures · North Pacific Ocean031
Other · North Sealong running031
Surveys · Norwegian Sealong running031
Derelicts · Red Sealong running031
Nav aids · Sea of Okhotsklong running031
Piracy · Singapore Strait031
Exercises · South Atlantic Oceanlong running031
Icebergs · South Atlantic Oceanlong running031
Cable ops · South China Sealong running031
Surveys · South China Sealong running031
Spills · South Pacific Ocean031
Incidents · South Pacific Ocean031
Missiles · Sulu Sea031
Cable ops · Tasman Sea031
Nav aids · The Coastal Waters of Southeast Alaska and British Columbialong running031
Nav aids · The Northwestern Passageslong running031

Cite: seahazards.com Sea Ledger, 2026-03, 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, March 2026 — warnings by sea and type · seahazards