Sea Ledger, July 2024

2024-07-01 to 2024-07-31 · gap

issued
63
warning-days in force
13,009
in force at month end
431
sea × type cells
144

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
Quakes25106.14
Spills1830114
Nav aids85,368.9176
Surveys72,098.970
Cable ops3997.833
Wrecks11,820.959
Derelicts1833
Other096131
Mines01244
Exercises02177
Incidents0311
Missiles01866
Restricted0311
Towing0622
Debris0311
Icebergs0311
War risk0622
Structures0311
Volcanic037212
Ordnance0933

By sea and type · 144 cells, most issued first

cellissuedwarning-daysvs 5 y
Quakes · South Pacific Ocean925.4
Spills · Gulf of Mexico892
Quakes · North Pacific Ocean824
Spills · Gulf of Alaska332
Nav aids · North Atlantic Oceanlong running2507.8
Surveys · North Atlantic Ocean2348.2
Spills · North Atlantic Oceanlong running260
Surveys · Bay of Biscay232.7
Nav aids · Caribbean Sealong running11,176
Nav aids · South Atlantic Oceanlong running1908.9
Cable ops · North Atlantic Ocean1338.3
Wrecks · Caribbean Sealong running1146.9
Nav aids · Celtic Sea1102.8
Nav aids · Hudson Straitlong running171.2
Spills · Caribbean Sea170
Cable ops · South China Sea159.6
Nav aids · Tasman Sea144.7
Surveys · Sea of Okhotsk143.5
Quakes · Coral Sea134
Surveys · Gulf of Mexico126.3
Derelicts · Caribbean Sea121
Spills · North Pacific Ocean119
Spills · The Coastal Waters of Southeast Alaska and British Columbia118
Nav aids · Hudson Bay115.5
Cable ops · Timor Sea110.9
Surveys · Celtic Sea18.2
Spills · Bering Sea17
Quakes · Banda Sea13
Quakes · Bismarck Sea13
Quakes · Celebes Sea13
Quakes · Indian Ocean13
Quakes · Philippine Sea13
Quakes · South China Sea13
Spills · South China Sea13
Quakes · Southern Ocean13
Nav aids · South Pacific Oceanlong running0341
Nav aids · Gulf of Mexicolong running0310
Volcanic · Philippine Sealong running0310
Other · Gulf of Mexico0279
Nav aids · North Pacific Oceanlong running0279
Wrecks · Arabian Sealong running0248
Other · Caribbean Sealong running0217
Surveys · Indian Oceanlong running0217
Surveys · The Northwestern Passageslong running0217
Surveys · South Pacific Ocean0212
Wrecks · North Atlantic Ocean0186
Cable ops · Persian Gulflong running0186
Wrecks · Persian Gulflong running0186
Nav aids · South China Sea0186
Wrecks · The Northwestern Passageslong running0186
Surveys · South Atlantic Ocean0157
Nav aids · Andaman or Burma Sealong running0155
Nav aids · Arabian Sealong running0155
Wrecks · South Atlantic Ocean0155
Mines · Black Sealong running0124
Nav aids · English Channel0124
Missiles · North Atlantic Ocean0124
Exercises · Aegean Sea093
Surveys · Arctic Ocean093
Nav aids · Bay of Biscaylong running093
Ordnance · Bay of Biscaylong running093
Nav aids · Beaufort Sealong running093
Nav aids · Bering Sealong running093
Surveys · Caribbean Sea093
Nav aids · Indian Ocean093
Surveys · Persian Gulflong running093
Cable ops · Philippine Sea093
Wrecks · South China Sealong running093
Wrecks · South Pacific Oceanlong running093
Surveys · Timor Sea093
Nav aids · Arafura Sea062
Wrecks · Bay of Bengallong running062
Other · Bay of Biscaylong running062
Exercises · Black Sealong running062
War risk · Black Sealong running062
Surveys · Chukchi Sea062
Wrecks · Coral Sealong running062
Nav aids · Gulf of Alaska062
Cable ops · Indian Ocean062
Other · Indian Ocean062
Nav aids · Irish Sea and St. George's Channel062
Surveys · Kara Sealong running062
Wrecks · Kara Sea062
Nav aids · Laccadive Sealong running062
Other · North Atlantic Ocean062
Other · North Pacific Ocean062
Towing · 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 · Sulu Sea062
Missiles · Aegean Sea031
Wrecks · Arafura Sea031
Nav aids · Arctic Ocean031
Derelicts · Bass Strait031
Surveys · Bass Strait031
Other · Bay of Bengal031
Surveys · Bay of Bengal031
Debris · Bay of Biscaylong running031
Wrecks · Bay of Biscay031
Other · Beaufort Sea031
Surveys · Beaufort Sea031
Other · Black Sea031
Surveys · Black Sea031
Cable ops · Caribbean Sea031
Exercises · Caribbean Sea031
Cable ops · Celtic Sea031
Nav aids · Coral Sea031
Wrecks · Eastern China Sealong running031
Wrecks · English Channel031
Nav aids · Gulf of Californialong running031
Cable ops · Gulf of Guinea031
Exercises · Gulf of Mexico031
Wrecks · Gulf of Mexicolong running031
Nav aids · Gulf of Oman031
Wrecks · Gulf of Suez031
Wrecks · Hudson Baylong running031
Restricted · Indian Ocean031
Other · Irish Sea and St. George's Channel031
Surveys · Irish Sea and St. George's Channel031
Wrecks · Irish Sea and St. George's Channel031
Cable ops · Java Sea031
Icebergs · Labrador Sea031
Surveys · Laccadive 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
Derelicts · North Atlantic Ocean031
Incidents · North Atlantic Ocean031
Missiles · North Pacific Oceanlong running031
Surveys · Norwegian Sea031
Nav aids · Philippine Sea031
Surveys · South China Sea031
Surveys · Tasman Sea031
Nav aids · The Coastal Waters of Southeast Alaska and British Columbialong running031
Nav aids · The Northwestern Passages031
Quakes · South Atlantic Ocean01.7

Cite: seahazards.com Sea Ledger, 2024-07, 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, July 2024 — warnings by sea and type · seahazards