Sea Ledger, September 2010

2010-09-01 to 2010-09-30 · archive

issued: 391
warning-days in force: 7,107
in force at month end: 256
sea × type cells: 179

baseline: same month, previous 5 years (2009-09, 2008-09, 2007-09, 2006-09, 2005-09)

By type

type	issued	warning-days	in force at end
Exercises	78	651.3	21
Nav aids	60	1,443.1	48
Incidents	52	625.3	24
Cable ops	49	1,025.9	36
Quakes	35	93.2	6
Piracy	30	255.3	17
Missiles	27	206	6
Surveys	20	1,652.4	56
Wrecks	9	409.1	16
Derelicts	8	25.4	2
Other	8	303.4	10
Spills	6	81.1	2
Ordnance	4	167.3	7
Restricted	2	54.4	1
Structures	1	56.3	2
Debris	1	3	0
Towing	1	24.5	1
Volcanic	0	30	1

By sea and type · 179 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceanlong running	22	251.9	8	691	1.1× / 19.8
Missiles · North Pacific Oceansurge	17	96	2	61	3.4× / 5
Incidents · North Pacific Oceansurge	14	66.3	6	55	2.1× / 6.8
Nav aids · North Seasurge	13	141.4	5	196	2.1× / 6.2
Quakes · South Pacific Ocean	13	34.8	2	26	1.1× / 11.8
Exercises · Japan Seasurge	11	77	4	35	2.4× / 4.6
Nav aids · North Atlantic Oceansurgelong running	10	186.6	8	579	2.2× / 4.6
Piracy · South China Seasurge	10	109	0	—	50× / 0.2
Exercises · South Pacific Ocean	9	27.9	2	29	1.6× / 5.8
Piracy · Indian Oceannew	8	45	7	16	new / 0
Piracy · Arabian Seanew	8	24.7	8	6	new / 0
Nav aids · South Atlantic Oceanlong running	7	305.8	9	771	1.4× / 5
Cable ops · South China Seasurge	7	90.1	5	81	2.1× / 3.4
Incidents · South Atlantic Ocean	7	41.2	3	41	1.8× / 4
Surveys · North Seasurge	6	84.3	2	211	3.8× / 1.6
Exercises · Philippine Sea	6	75.8	2	34	1.9× / 3.2
Exercises · North Pacific Ocean	6	51.1	1	34	0.6× / 9.8
Exercises · South Atlantic Ocean	6	47.5	0	—	0.9× / 7
Exercises · Yellow Sea	6	45.8	2	35	1.2× / 5
Exercises · Laccadive Sea	6	43	0	—	0.9× / 6.8
Nav aids · Coral Seasurge	6	24.5	0	—	3.0× / 2
Incidents · North Atlantic Ocean	5	225.8	5	57	0.9× / 5.8
Cable ops · Mediterranean Sea - Eastern Basin	5	122.5	5	210	1.9× / 2.6
Exercises · South China Seasurge	5	43	3	34	2.1× / 2.4
Nav aids · Gulf of Mexicosurge	5	41.1	1	51	2.5× / 2
Exercises · North Atlantic Ocean	5	24.8	2	25	0.5× / 10.6
Spills · Gulf of Mexico	4	59.1	1	38	0.5× / 8.2
Quakes · North Pacific Ocean	4	12	0	—	1.1× / 3.6
Quakes · Arafura Seanew	4	6.5	3	4	new / 0
Surveys · South Atlantic Oceansurge	3	98.8	3	123	2.1× / 1.4
Cable ops · North Atlantic Ocean	3	62.8	2	54	1.4× / 2.2
Exercises · Arabian Sea	3	44.2	1	34	0.9× / 3.2
Piracy · Gulf of Adennew	3	33	1	33	new / 0
Incidents · Philippine Sea	3	19.5	0	—	0.5× / 6
Exercises · Bay of Bengal	3	17.1	0	—	0.7× / 4.6
Exercises · Baltic Sea	3	16.8	0	—	1.9× / 1.6
Missiles · Barentsz Seanew	3	13.6	1	24	new / 0
Incidents · Caribbean Seasurge	3	12.9	1	21	5.0× / 0.6
Surveys · North Atlantic Ocean	3	10.8	1	22	1.9× / 1.6
Quakes · Indian Ocean	3	9	0	—	0.4× / 7.6
Nav aids · Indian Oceansurge	3	2.3	0	—	3.8× / 0.8
Incidents · Indian Ocean	3	0.4	0	—	0.8× / 3.6
Surveys · Arctic Oceanlong running	2	595.7	21	2,457	10× / 0.2
Wrecks · The Northwestern Passages	2	115.4	4	90	5.0× / 0.4
Nav aids · Arabian Sea	2	89.6	4	288	10× / 0.2
Cable ops · Gulf of Guinea	2	89.3	3	123	1.7× / 1.2
Other · Mediterranean Sea - Eastern Basin	2	71	3	261	1.7× / 1.2
Cable ops · North Sea	2	60.6	2	120	1.3× / 1.6
Wrecks · North Atlantic Oceannewlong running	2	52.5	2	442	new / 0
Incidents · Mozambique Channel	2	50.6	1	55	3.3× / 0.6
Wrecks · Arabian Seanew	2	37.3	2	288	new / 0
Missiles · South Atlantic Oceannew	2	31.3	2	19	new / 0
Incidents · Tyrrhenian Sea	2	18.6	2	71	10× / 0.2
Incidents · Adriatic Sea	2	15.8	2	14	10× / 0.2
Exercises · Indian Ocean	2	15.1	0	—	0.9× / 2.2
Nav aids · Laccadive Sea	2	12.3	1	15	5.0× / 0.4
Missiles · Black Seanew	2	12.2	1	13	new / 0
Other · Coral Seanew	2	11.6	0	—	new / 0
Derelicts · North Pacific Oceannew	2	10.6	1	24	new / 0
Quakes · Bering Sea	2	6	0	—	5.0× / 0.4
Quakes · Solomon Sea	2	6	0	—	0.8× / 2.6
Nav aids · Gulf of Alaska	2	5.7	1	19	1.7× / 1.2
Derelicts · South Atlantic Ocean	2	5.6	0	—	1.0× / 2
Surveys · Arabian Seanew	2	5.1	1	4	new / 0
Exercises · Coral Sea	2	4.9	0	—	10× / 0.2
Surveys · Inner Seas off the West Coast of Scotlandnew	2	2.6	0	—	new / 0
Incidents · Coral Sea	2	2.3	0	—	1.3× / 1.6
Surveys · The Northwestern Passageslong running	1	152	5	755	1.3× / 0.8
Nav aids · Bay of Bengal	1	96	3	44	2.5× / 0.4
Nav aids · South Pacific Ocean	1	92.5	3	259	0.5× / 2
Nav aids · English Channel	1	62.5	2	104	0.4× / 2.4
Structures · North Sea	1	56.3	2	164	5.0× / 0.2
Surveys · Chukchi Sealong running	1	48.7	2	1,990	new / 0
Wrecks · South China Sealong running	1	43.9	2	1,163	2.5× / 0.4
Nav aids · Mediterranean Sea - Western Basin	1	38.5	1	66	1.3× / 0.8
Nav aids · North Pacific Ocean	1	37.4	0	—	0.6× / 1.6
Ordnance · Gulf of Aden	1	32.6	2	63	new / 0
Ordnance · Ionian Sea	1	32.6	2	63	new / 0
Nav aids · Irish Sea and St. George's Channel	1	31.9	1	346	0.3× / 3.2
Cable ops · Sea of Okhotsk	1	30.8	1	37	1.7× / 0.6
Incidents · Ionian Sea	1	29.9	1	29	new / 0
Restricted · Gulf of Mexico	1	27.8	1	27	new / 0
Ordnance · Persian Gulf	1	27.2	1	34	5.0× / 0.2
Restricted · North Atlantic Ocean	1	26.6	0	—	1.7× / 0.6
Cable ops · Norwegian Sea	1	25.4	1	25	2.5× / 0.4
Incidents · Andaman or Burma Sea	1	24.7	1	24	5.0× / 0.2
Towing · South China Sea	1	24.5	1	24	new / 0
Incidents · Japan Sea	1	22	1	22	5.0× / 0.2
Incidents · South Pacific Ocean	1	21.6	0	—	0.2× / 5.6
Cable ops · East Siberian Sea	1	21.5	1	21	new / 0
Other · Laptev Sea	1	21.4	1	21	new / 0
Cable ops · Gulf of Thailand	1	19.9	0	—	new / 0
Incidents · Davis Strait	1	17.6	0	—	new / 0
Incidents · Arabian Sea	1	17.4	1	17	1.0× / 1
Incidents · South China Sea	1	17.4	0	—	0.2× / 4.4
Cable ops · English Channel	1	16.3	1	16	5.0× / 0.2
Spills · Beaufort Sea	1	14	0	—	new / 0
Piracy · Red Sea	1	13.6	0	—	new / 0
Missiles · Bay of Bengal	1	11.6	0	—	new / 0
Cable ops · Barentsz Sea	1	10.5	1	10	new / 0
Cable ops · Makassar Strait	1	10	1	10	5.0× / 0.2
Ordnance · North Pacific Ocean	1	9.5	0	—	new / 0
Wrecks · Indian Ocean	1	9.1	1	9	5.0× / 0.2
Exercises · Gulf of Guinea	1	8.4	0	—	new / 0
Spills · Caribbean Sea	1	8	1	8	new / 0
Other · Mediterranean Sea - Western Basin	1	7.8	0	—	new / 0
Nav aids · Andaman or Burma Sea	1	7.4	1	7	new / 0
Other · Black Sea	1	7.3	0	—	new / 0
Exercises · Persian Gulf	1	7.1	0	—	new / 0
Missiles · Japan Sea	1	6.6	0	—	new / 0
Missiles · South Pacific Ocean	1	5.8	0	—	new / 0
Exercises · Mediterranean Sea - Western Basin	1	5.5	1	5	1.0× / 1
Exercises · Mediterranean Sea - Eastern Basin	1	3.7	0	—	1.0× / 1
Quakes · South Atlantic Ocean	1	3.3	0	—	1.0× / 1
Quakes · Andaman or Burma Sea	1	3	0	—	new / 0
Quakes · Bismarck Sea	1	3	0	—	new / 0
Quakes · Coral Sea	1	3	0	—	0.4× / 2.8
Derelicts · East Siberian Sea	1	3	0	—	new / 0
Quakes · Halmahera Sea	1	3	0	—	new / 0
Derelicts · Indian Ocean	1	3	0	—	1.0× / 1
Quakes · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Debris · South Atlantic Ocean	1	3	0	—	5.0× / 0.2
Other · South Atlantic Ocean	1	3	0	—	0.6× / 1.6
Derelicts · Timor Sea	1	3	0	—	new / 0
Exercises · Gulf of Alaska	1	2.6	0	—	new / 0
Cable ops · Halmahera Sea	1	1.6	0	—	new / 0
Nav aids · Bristol Channel	1	1.3	1	1	new / 0
Wrecks · Persian Gulf	1	0.9	0	—	2.5× / 0.4
Quakes · South China Sea	1	0.6	1	0	new / 0
Nav aids · Arafura Sea	1	0.4	0	—	1.3× / 0.8
Incidents · Arafura Sea	1	0.3	0	—	new / 0
Derelicts · North Atlantic Ocean	1	0.2	1	0	1.0× / 1
Incidents · Timor Sea	1	0.2	0	—	new / 0
Nav aids · Bass Strait	1	0	0	—	1.3× / 0.8
Surveys · Beaufort Sealong running	0	300	10	2,457	0.0× / 0.4
Exercises · Aegean Sea	0	90	3	274	0.0× / 2.6
Surveys · Laptev Sealong running	0	90	3	1,591	— / 0
Surveys · Baffin Bay	0	60	2	90	0.0× / 0.2
Cable ops · Beaufort Sea	0	60	2	61	— / 0
Cable ops · Caribbean Sea	0	60	2	48	— / 0
Nav aids · Gulf of Suezlong running	0	60	2	636	0.0× / 0.6
Nav aids · Malacca Strait	0	60	2	191	0.0× / 0.2
Wrecks · North Sea	0	60	2	132	0.0× / 0.8
Other · Persian Gulf	0	60	2	47	— / 0
Surveys · Sea of Okhotsk	0	60	2	70	— / 0
Surveys · Mozambique Channel	0	47.4	1	162	— / 0
Other · Arctic Ocean	0	30	1	88	0.0× / 0.2
Surveys · Bering Sea	0	30	1	47	0.0× / 0.2
Nav aids · Celtic Sea	0	30	1	179	0.0× / 2.6
Ordnance · English Channel	0	30	1	198	— / 0
Surveys · Greenland Sealong running	0	30	1	2,773	— / 0
Other · Gulf of Suez	0	30	1	44	— / 0
Cable ops · Labrador Sea	0	30	1	72	0.0× / 1
Wrecks · Laccadive Sea	0	30	1	44	0.0× / 0.2
Wrecks · Mediterranean Sea - Eastern Basin	0	30	1	66	0.0× / 0.4
Nav aids · Mozambique Channel	0	30	1	163	0.0× / 0.2
Ordnance · North Sealong running	0	30	1	699	0.0× / 1.4
Piracy · Persian Gulflong running	0	30	1	995	— / 0
Nav aids · Philippine Sea	0	30	1	55	— / 0
Volcanic · Philippine Sea	0	30	1	216	— / 0
Wrecks · South Atlantic Ocean	0	30	1	141	— / 0
Other · South China Sealong running	0	30	1	806	0.0× / 0.2
Other · The Northwestern Passages	0	30	1	61	— / 0
Surveys · Yellow Sea	0	30	1	44	— / 0
Missiles · Philippine Sea	0	28.9	0	—	— / 0
Cable ops · Mozambique Channel	0	19.7	0	—	— / 0
Nav aids · Beaufort Sea	0	19.6	0	—	— / 0
Nav aids · Labrador Sea	0	18.9	0	—	— / 0
Incidents · Gulf of Mexico	0	17.4	0	—	— / 0
Nav aids · Sea of Okhotsk	0	17.4	0	—	0.0× / 0.2
Cable ops · Gulf of Mexico	0	15	0	—	0.0× / 0.8
Cable ops · Singapore Strait	0	13	0	—	0.0× / 0.6
Cable ops · Gulf of Suez	0	11	0	—	0.0× / 0.2
Surveys · Bay of Biscay	0	7	0	—	— / 0
Ordnance · Black Sea	0	5.4	0	—	— / 0
Cable ops · Sulu Sea	0	4	0	—	— / 0
Incidents · Mediterranean Sea - Western Basin	0	3.4	0	—	— / 0
Other · North Sea	0	1.3	0	—	0.0× / 0.8
Surveys · Philippine Sea	0	0	0	—	0.0× / 0.6

Cite: seahazards.com Sea Ledger, 2010-09, 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.