Sea Ledger, October 2024

2024-10-01 to 2024-10-31 · gap

issued
78
warning-days in force
16,144
in force at month end
543
sea × type cells
175

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
Exercises201,297.554
Quakes2090.23
Surveys142,872.498
Spills82047
Cable ops51,420.449
Nav aids46,119.9197
Missiles3328.812
Icebergs262.12
Towing191.63
Volcanic1504.517
Other0671.321
Mines01555
Wrecks01,89161
Incidents063.62
Restricted0311
Derelicts0933
Debris0311
War risk0622
Storms0311
Structures0311
Ordnance0933

By sea and type · 175 cells, most issued first

cellissuedwarning-daysvs 5 y
Exercises · North Pacific Ocean10196.2
Quakes · South Pacific Ocean927
Quakes · North Pacific Ocean515.7
Surveys · South Atlantic Oceanlong running3276.3
Surveys · Indian Oceanlong running2331.8
Cable ops · Philippine Sea2153.9
Surveys · Persian Gulflong running2146.8
Exercises · Bay of Bengal2128.1
Exercises · South Pacific Ocean2121.9
Surveys · Arabian Sea283.1
Cable ops · South Pacific Ocean247.7
Spills · North Atlantic Oceanlong running247
Exercises · Laccadive Sea233.1
Quakes · Molukka Sea26
Nav aids · North Atlantic Oceanlong running1745.1
Volcanic · Philippine Sealong running1442.5
Nav aids · South Pacific Oceanlong running1440.8
Surveys · North Atlantic Ocean1347.2
Missiles · North Atlantic Ocean1159.9
Nav aids · Irish Sea and St. George's Channel1154.9
Exercises · Philippine Sea1122.8
Surveys · Sea of Okhotsk1112.6
Surveys · Laccadive Sealong running1108.5
Exercises · Arabian Sea199.4
Towing · North Pacific Ocean191.6
Missiles · Indian Ocean173.7
Surveys · Bay of Bengal168.6
Nav aids · Great Australian Bight167.3
Cable ops · North Pacific Ocean165.5
Icebergs · Labrador Sea131.7
Surveys · North Pacific Ocean130.4
Icebergs · South Atlantic Ocean130.4
Exercises · South Atlantic Ocean130
Spills · Gulf of Mexico122
Spills · North Pacific Ocean122
Spills · Bering Sea114
Spills · Philippine Sea114
Spills · South Pacific Ocean114
Spills · The Coastal Waters of Southeast Alaska and British Columbia19
Exercises · Gulf of California16.4
Quakes · Banda Sea13
Quakes · Indian Ocean13
Quakes · Philippine Sea13
Missiles · South Pacific Ocean12.2
Quakes · Bismarck Sea11.5
Nav aids · Caribbean Sealong running01,271
Nav aids · South Atlantic Oceanlong running0588.8
Nav aids · Gulf of Mexicolong running0341
Nav aids · North Pacific Oceanlong running0279
Wrecks · Arabian Sealong running0248
Cable ops · North Atlantic Ocean0223.3
Wrecks · Persian Gulflong running0217
Nav aids · South China Sea0217
Surveys · The Northwestern Passageslong running0217
Nav aids · Arabian Sealong running0186
Nav aids · Celtic Sealong running0186
Wrecks · North Atlantic Oceanlong running0186
Cable ops · Persian Gulflong running0186
Wrecks · South Atlantic Oceanlong running0186
Surveys · South Pacific Ocean0186
Wrecks · The Northwestern Passageslong running0186
Nav aids · Andaman or Burma Sealong running0155
Mines · Black Sealong running0155
Wrecks · Caribbean Sealong running0155
Cable ops · South China Sea0155
Other · Caribbean Sealong running0130.2
Nav aids · Bering Sealong running0124
Exercises · Black Sealong running0124
Cable ops · Celtic Sea0124
Nav aids · English Channel0124
Surveys · Timor Sea0124
Exercises · Aegean Sea093
Surveys · Arctic Oceanlong running093
Nav aids · Bay of Biscaylong running093
Ordnance · Bay of Biscaylong running093
Nav aids · Beaufort Sealong running093
Nav aids · Gulf of Alaska093
Nav aids · Hudson Straitlong running093
Cable ops · Indian Ocean093
Nav aids · Indian Oceanlong running093
Nav aids · Laccadive Sealong running093
Exercises · North Atlantic Ocean093
Other · North Atlantic Ocean093
Wrecks · South China Sealong running093
Wrecks · South Pacific Oceanlong running093
Surveys · Caribbean Sea065.1
Cable ops · Arabian Sea062
Nav aids · Arafura Sea062
Nav aids · Bay of Bengal062
Wrecks · Bay of Bengallong running062
Other · Bay of Biscaylong running062
Surveys · Bay of Biscay062
Surveys · Black Sea062
War risk · Black Sealong running062
Spills · Caribbean Sea062
Surveys · Chukchi Sealong running062
Nav aids · Coral Sea062
Wrecks · Coral Sealong running062
Surveys · Gulf of Mexico062
Other · Indian Ocean062
Surveys · Irish Sea and St. George's Channel062
Surveys · Kara Sealong running062
Wrecks · Kara Sealong running062
Other · North Pacific Ocean062
Volcanic · North Pacific Ocean062
Wrecks · North Pacific Oceanlong running062
Nav aids · North Sea062
Nav aids · Persian Gulflong running062
Other · Persian Gulflong running062
Cable ops · South Atlantic Ocean062
Incidents · South China Sea062
Cable ops · Sulu Sea062
Nav aids · Tasman Sea062
Exercises · Gulf of Mexico032.6
Missiles · Aegean Sea031
Missiles · Arabian Sea031
Wrecks · Arafura Sea031
Nav aids · Arctic Oceanlong running031
Derelicts · Bass Strait031
Surveys · Bass Strait031
Other · Bay of Bengallong running031
Debris · Bay of Biscaylong running031
Wrecks · Bay of Biscay031
Other · Beaufort Sea031
Surveys · Beaufort Sealong running031
Nav aids · Black Sea031
Other · Black Sea031
Cable ops · Caribbean Sea031
Derelicts · Caribbean Sea031
Exercises · Caribbean Sealong running031
Surveys · Celtic Sea031
Quakes · Coral Sea031
Exercises · Coral Sea031
Wrecks · Eastern China Sealong running031
Wrecks · English Channel031
Surveys · Great Australian Bight031
Nav aids · Gulf of Californialong running031
Cable ops · Gulf of Guinea031
Storms · Gulf of Mexico031
Wrecks · Gulf of Mexicolong running031
Nav aids · Gulf of Oman031
Wrecks · Gulf of Suez031
Nav aids · Hudson Bay031
Wrecks · Hudson Baylong running031
Restricted · Indian Ocean031
Nav aids · Inner Seas off the West Coast of Scotland031
Exercises · Irish Sea and St. George's Channel031
Other · Irish Sea and St. George's Channel031
Wrecks · Irish Sea and St. George's Channel031
Exercises · Japan Sea031
Cable ops · Java Sealong running031
Wrecks · Laccadive Sealong running031
Cable ops · Ligurian Sea031
Nav aids · Mediterranean Sea - Eastern Basinlong running031
Other · Mediterranean Sea - Eastern Basin031
Surveys · Mediterranean Sea - Eastern Basin031
Cable ops · Mediterranean Sea - Western Basin031
Surveys · Mediterranean Sea - Western Basin031
Structures · Mozambique Channellong running031
Surveys · Mozambique Channel031
Derelicts · North Atlantic Oceanlong running031
Missiles · North Pacific Oceanlong running031
Other · North Sea031
Surveys · Norwegian Sea031
Nav aids · Philippine Sea031
Exercises · Red Sea031
Exercises · Sea of Okhotsk031
Exercises · South China Sea031
Surveys · South China Sea031
Surveys · Tasman Sea031
Nav aids · The Coastal Waters of Southeast Alaska and British Columbialong running031
Nav aids · The Northwestern Passageslong running031
Cable ops · Timor Sea031
Other · Gulf of Mexico014.1
Incidents · North Atlantic Ocean01.6

Cite: seahazards.com Sea Ledger, 2024-10, 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, October 2024 — warnings by sea and type · seahazards