Sea Ledger, August 2010

2010-08-01 to 2010-08-31 · archive

issued: 334
warning-days in force: 7,426
in force at month end: 221
sea × type cells: 174

baseline: same month, previous 5 years (2009-08, 2008-08, 2007-08, 2006-08, 2005-08)

By type

type	issued	warning-days	in force at end
Exercises	63	774.1	14
Nav aids	54	1,408.3	52
Incidents	47	929.4	21
Cable ops	45	1,172.4	34
Quakes	40	126.4	1
Surveys	23	1,713.2	56
Piracy	21	240.6	4
Missiles	13	112.8	4
Other	7	235	9
Ordnance	6	175.9	9
Derelicts	5	16.7	0
Wrecks	3	362.1	12
Spills	3	52.4	2
Debris	2	6.8	0
Restricted	1	35.1	1
Containers	1	3	0
Structures	0	31	1
Volcanic	0	31	1

By sea and type · 174 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceanlong running	23	268.3	8	661	1.5× / 15
Incidents · North Pacific Ocean	11	121.6	4	72	1.1× / 10.4
Incidents · North Atlantic Oceansurge	10	252.5	6	77	2.6× / 3.8
Piracy · South China Seasurge	9	76.4	2	24	23× / 0.4
Piracy · Gulf of Adensurge	9	74.8	1	29	9.0× / 1
Quakes · North Pacific Ocean	9	28.2	0	—	1.4× / 6.4
Nav aids · South Atlantic Oceansurgelong running	8	280.1	12	741	2.0× / 4
Nav aids · North Seasurge	8	114.2	4	166	2.0× / 4
Exercises · Japan Seasurge	8	75.6	2	34	2.2× / 3.6
Quakes · Philippine Seasurge	8	24	0	—	2.9× / 2.8
Incidents · South Atlantic Ocean	7	38.8	1	27	1.5× / 4.6
Quakes · South Pacific Ocean	7	21	0	—	0.6× / 11.4
Cable ops · North Atlantic Ocean	5	127.9	2	81	1.1× / 4.6
Exercises · Philippine Sea	5	105.2	1	34	1.4× / 3.6
Surveys · The Northwestern Passagesnewlong running	5	93.6	5	725	new / 0
Exercises · South China Seasurge	5	93.3	1	34	13× / 0.4
Incidents · South Pacific Ocean	5	53.1	2	62	0.5× / 10.6
Exercises · Bay of Bengal	5	43.1	1	31	1.0× / 4.8
Exercises · Yellow Sea	5	42.6	1	34	1.7× / 3
Exercises · Laccadive Sea	5	32.2	1	26	0.7× / 6.8
Quakes · Coral Seasurge	5	15	0	—	3.1× / 1.6
Nav aids · North Atlantic Oceansurgelong running	4	163.1	5	549	2.0× / 2
Surveys · North Seasurge	4	93.2	3	181	2.9× / 1.4
Missiles · North Pacific Ocean	4	62	2	37	0.7× / 6.2
Surveys · South Atlantic Oceansurge	4	61.3	4	93	2.0× / 2
Nav aids · Bay of Bengalsurge	4	52.8	3	31	20× / 0.2
Exercises · Gulf of Mexicosurge	4	45.7	0	—	2.5× / 1.6
Nav aids · Gulf of Mexicosurge	4	28	2	21	2.9× / 1.4
Incidents · Coral Sea	4	19.9	0	—	1.5× / 2.6
Cable ops · North Seasurge	3	158.4	4	90	2.1× / 1.4
Nav aids · English Channelsurge	3	64.4	3	74	2.1× / 1.4
Exercises · South Atlantic Ocean	3	60.7	1	46	0.4× / 7.4
Incidents · South China Sea	3	57.4	1	63	1.3× / 2.4
Exercises · North Pacific Ocean	3	52.5	1	35	0.3× / 12.2
Exercises · Arabian Sea	3	50.7	1	33	1.5× / 2
Nav aids · Irish Sea and St. George's Channel	3	48.2	1	316	1.5× / 2
Nav aids · Coral Sea	3	41.1	1	42	1.9× / 1.6
Spills · Gulf of Mexico	3	33.4	2	36	0.6× / 5
Exercises · Baltic Seasurge	3	18	0	—	3.0× / 1
Nav aids · Indian Ocean	3	16.4	0	—	1.3× / 2.4
Exercises · Indian Ocean	3	12	0	—	1.9× / 1.6
Missiles · Philippine Seanew	3	10.7	1	11	new / 0
Wrecks · North Sea	2	38.3	2	102	2.5× / 0.8
Other · Persian Gulf	2	32.4	2	17	5.0× / 0.4
Cable ops · Caribbean Sea	2	26	2	18	5.0× / 0.4
Surveys · Black Sea	2	23	0	—	10× / 0.2
Exercises · South Pacific Ocean	2	14.8	0	—	0.7× / 3
Incidents · Davis Straitnew	2	14.2	1	14	new / 0
Cable ops · Celtic Sea	2	10.9	0	—	3.3× / 0.6
Nav aids · Tasman Sea	2	7.7	0	—	1.7× / 1.2
Exercises · The Northwestern Passagesnew	2	7.6	0	—	new / 0
Ordnance · Philippine Sea	2	7.1	0	—	10× / 0.2
Quakes · Bismarck Sea	2	6	0	—	3.3× / 0.6
Quakes · Indian Ocean	2	6	0	—	0.8× / 2.6
Quakes · North Atlantic Ocean	2	6	0	—	5.0× / 0.4
Quakes · Solomon Sea	2	6	0	—	2.5× / 0.8
Missiles · Black Seanew	2	2.8	0	—	new / 0
Nav aids · Gulf of Alaska	2	2.8	0	—	2.5× / 0.8
Exercises · Baffin Baynew	2	1.6	0	—	new / 0
Surveys · Beaufort Sealong running	1	421.4	10	2,427	new / 0
Nav aids · South Pacific Ocean	1	163.9	5	229	1.0× / 1
Cable ops · Mediterranean Sea - Eastern Basin	1	113.2	4	180	0.6× / 1.8
Cable ops · South China Sea	1	101.4	2	90	0.2× / 4.6
Cable ops · Gulf of Guinea	1	66.5	3	93	5.0× / 0.2
Nav aids · Arabian Sea	1	56.3	2	258	1.0× / 1
Cable ops · Beaufort Sea	1	52.5	2	31	new / 0
Incidents · Philippine Sea	1	50.9	2	37	0.1× / 6.8
Cable ops · Sea of Okhotsk	1	48.4	1	61	1.3× / 0.8
Piracy · Persian Gulflong running	1	43.7	1	965	new / 0
Incidents · Gulf of Mexico	1	41.1	1	65	5.0× / 0.2
Surveys · Sea of Okhotsk	1	40.5	2	40	1.0× / 1
Surveys · Mozambique Channel	1	38.5	2	132	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	36.5	2	36	1.7× / 0.6
Piracy · Red Sea	1	35.5	0	—	new / 0
Ordnance · Gulf of Aden	1	33.7	2	64	new / 0
Ordnance · Ionian Sea	1	33.7	2	62	new / 0
Surveys · Bering Sealong running	1	31	1	684	new / 0
Nav aids · Philippine Sea	1	25.5	1	25	new / 0
Incidents · Mozambique Channel	1	25.3	1	25	1.3× / 0.8
Cable ops · Persian Gulf	1	21.8	0	—	1.3× / 0.8
Missiles · South Atlantic Ocean	1	18.6	0	—	new / 0
Surveys · Philippine Sea	1	17.7	1	39	1.7× / 0.6
Cable ops · Singapore Strait	1	15.9	1	15	0.8× / 1.2
Cable ops · Mozambique Channel	1	15.1	1	15	new / 0
Cable ops · Gulf of Suez	1	15	1	14	2.5× / 0.4
Other · Gulf of Suez	1	15	1	14	new / 0
Missiles · North Atlantic Ocean	1	14.9	0	—	new / 0
Surveys · Yellow Sea	1	14.8	1	14	5.0× / 0.2
Wrecks · Laccadive Sea	1	14.3	1	14	new / 0
Exercises · Gulf of California	1	13.7	0	—	5.0× / 0.2
Nav aids · Beaufort Sea	1	13	1	31	new / 0
Exercises · Persian Gulf	1	10.5	0	—	5.0× / 0.2
Piracy · Malacca Strait	1	10.2	0	—	new / 0
Nav aids · Labrador Sea	1	10	1	9	new / 0
Restricted · North Atlantic Ocean	1	8.3	1	8	5.0× / 0.2
Cable ops · Indian Ocean	1	5.6	0	—	5.0× / 0.2
Other · Indian Ocean	1	5.4	0	—	2.5× / 0.4
Quakes · South Atlantic Ocean	1	5.2	1	31	0.5× / 2.2
Ordnance · Persian Gulf	1	4.6	1	4	5.0× / 0.2
Quakes · Molukka Sea	1	4.5	0	—	0.8× / 1.2
Debris · North Atlantic Ocean	1	3.8	0	—	5.0× / 0.2
Ordnance · North Pacific Ocean	1	3.8	1	35	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	3.4	0	—	0.4× / 2.8
Surveys · Mediterranean Sea - Western Basin	1	3.3	0	—	2.5× / 0.4
Debris · Gulf of Guinea	1	3	0	—	new / 0
Derelicts · Indian Ocean	1	3	0	—	1.3× / 0.8
Quakes · Ionian Sea	1	3	0	—	new / 0
Derelicts · North Atlantic Ocean	1	3	0	—	0.5× / 2
Other · North Atlantic Ocean	1	3	0	—	0.5× / 2
Derelicts · Philippine Sea	1	3	0	—	1.0× / 1
Derelicts · South Atlantic Ocean	1	3	0	—	2.5× / 0.4
Containers · South Pacific Ocean	1	3	0	—	new / 0
Derelicts · South Pacific Ocean	1	3	0	—	1.3× / 0.8
Missiles · Arctic Ocean	1	2.4	0	—	new / 0
Other · North Sea	1	1.7	1	1	0.3× / 3
Incidents · Baffin Bay	1	1.5	0	—	new / 0
Missiles · Bay of Bengal	1	1.4	1	1	new / 0
Surveys · Bay of Biscay	1	1.2	1	1	new / 0
Exercises · Coral Sea	1	0.9	1	0	2.5× / 0.4
Nav aids · Great Australian Bight	1	0.9	0	—	0.6× / 1.6
Other · Arabian Sea	1	0.7	0	—	new / 0
Incidents · Solomon Sea	1	0.6	0	—	new / 0
Nav aids · Davis Strait	1	0.5	0	—	new / 0
Nav aids · Inner Seas off the West Coast of Scotland	1	0.5	0	—	0.5× / 2
Exercises · Caribbean Sea	1	0.3	0	—	2.5× / 0.4
Exercises · Ionian Sea	1	0.1	0	—	new / 0
Surveys · Arctic Oceanlong running	0	615.3	19	2,427	0.0× / 0.4
Exercises · Aegean Sea	0	93	3	244	0.0× / 1.2
Surveys · Laptev Sealong running	0	93	3	1,561	— / 0
Wrecks · The Northwestern Passages	0	93	3	60	— / 0
Surveys · Baffin Bay	0	84.4	2	60	— / 0
Incidents · Tyrrhenian Sea	0	78.8	1	53	0.0× / 0.4
Incidents · Caribbean Sea	0	75.2	0	—	0.0× / 0.2
Nav aids · Gulf of Suezlong running	0	62	2	606	0.0× / 0.2
Nav aids · Malacca Strait	0	62	2	161	— / 0
Other · Mediterranean Sea - Eastern Basin	0	62	2	231	0.0× / 1.2
Nav aids · North Pacific Ocean	0	62	2	74	0.0× / 0.6
Wrecks · South China Sealong running	0	62	2	1,133	0.0× / 0.4
Cable ops · Gulf of Mexico	0	52.1	1	105	0.0× / 0.8
Incidents · Mediterranean Sea - Western Basin	0	51.4	1	53	0.0× / 0.4
Other · Arctic Oceanlong running	0	38.5	1	1,092	0.0× / 0.4
Wrecks · Arabian Sea	0	31	1	258	0.0× / 0.4
Ordnance · Black Sea	0	31	1	39	— / 0
Nav aids · Celtic Sea	0	31	1	149	0.0× / 1.6
Surveys · Chukchi Sealong running	0	31	1	1,960	— / 0
Ordnance · English Channel	0	31	1	168	0.0× / 0.2
Surveys · Greenland Sealong running	0	31	1	2,743	— / 0
Cable ops · Labrador Sea	0	31	1	42	— / 0
Wrecks · Mediterranean Sea - Eastern Basin	0	31	1	36	— / 0
Nav aids · Mozambique Channel	0	31	1	133	0.0× / 0.2
Wrecks · North Atlantic Oceanlong running	0	31	1	412	— / 0
Ordnance · North Sealong running	0	31	1	669	0.0× / 0.6
Structures · North Sea	0	31	1	134	0.0× / 0.2
Volcanic · Philippine Sea	0	31	1	186	0.0× / 0.2
Nav aids · Sea of Okhotsk	0	31	1	73	— / 0
Wrecks · South Atlantic Ocean	0	31	1	111	0.0× / 0.2
Other · South China Sealong running	0	31	1	776	0.0× / 1
Cable ops · Sulu Sea	0	31	1	54	0.0× / 0.4
Other · The Northwestern Passages	0	31	1	31	— / 0
Wrecks · English Channel	0	30.5	0	—	0.0× / 0.8
Incidents · Eastern China Sea	0	27.4	0	—	— / 0
Restricted · Strait of Gibraltar	0	26.8	0	—	0.0× / 0.4
Surveys · North Atlantic Ocean	0	18	0	—	0.0× / 2
Incidents · Arabian Sea	0	13.4	0	—	0.0× / 1.2
Other · South Atlantic Ocean	0	13.4	0	—	0.0× / 0.2
Cable ops · Tasman Sea	0	11.4	0	—	— / 0
Spills · North Atlantic Ocean	0	11	0	—	0.0× / 2
Spills · Gulf of Alaska	0	8	0	—	0.0× / 0.2
Incidents · Indian Ocean	0	6.3	0	—	0.0× / 1.4
Derelicts · Coral Sea	0	1.7	0	—	— / 0
Quakes · Southern Ocean	0	1.2	0	—	0.0× / 2
Surveys · Mediterranean Sea - Eastern Basin	0	1	0	—	0.0× / 0.8
Other · Celtic Sea	0	0.9	0	—	0.0× / 0.4
Quakes · Celebes Sea	0	0.3	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2010-08, 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.