Sea Ledger, September 2009

2009-09-01 to 2009-09-30 · archive

issued: 377
warning-days in force: 7,295
in force at month end: 273
sea × type cells: 182

baseline: same month, previous 5 years (2008-09, 2007-09, 2006-09, 2005-09, 2004-09)

By type

type	issued	warning-days	in force at end
Exercises	78	754.5	22
Nav aids	65	1,351.7	49
Cable ops	64	979.5	31
Incidents	59	670.7	30
Quakes	37	83	16
Spills	17	263	13
Surveys	14	2,021.5	66
Other	12	361.1	13
Derelicts	10	24.3	3
Icebergs	7	21	2
Missiles	5	60	2
Wrecks	3	425.9	15
Ordnance	2	83.4	3
Debris	2	31.9	2
Piracy	1	40.8	2
Containers	1	3	0
Towing	0	30	1
Structures	0	30	1
Restricted	0	30	1
Volcanic	0	30	1

By sea and type · 182 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceansurge	30	226.1	6	326	2.0× / 15
Quakes · South Pacific Ocean	17	28.3	13	31	1.6× / 10.8
Incidents · North Atlantic Oceansurge	14	202.8	12	33	4.1× / 3.4
Incidents · North Pacific Oceansurge	14	148.3	6	72	3.5× / 4
Exercises · North Atlantic Ocean	13	46.4	3	28	1.4× / 9.4
Nav aids · South Atlantic Oceansurgelong running	10	361.3	14	680	3.3× / 3
Nav aids · North Atlantic Oceansurge	10	93.6	2	214	2.8× / 3.6
Incidents · South Atlantic Oceansurge	10	33.5	3	30	4.2× / 2.4
Spills · Gulf of Mexico	9	100	6	42	1.2× / 7.4
Nav aids · North Sea	8	101.5	3	202	1.5× / 5.4
Exercises · Philippine Seasurge	8	99.6	2	34	4.4× / 1.8
Exercises · South Atlantic Ocean	7	92.6	1	35	1.1× / 6.6
Exercises · North Pacific Ocean	7	62.9	1	34	0.7× / 9.8
Exercises · Japan Sea	6	45.8	1	31	1.5× / 4
Exercises · Yellow Sea	6	42.9	2	31	1.4× / 4.2
Icebergs · South Atlantic Oceansurge	6	16.1	2	15	2.1× / 2.8
Cable ops · South China Sea	5	137	3	60	1.8× / 2.8
Cable ops · Gulf of Guineasurge	5	81.1	4	47	25× / 0.2
Nav aids · English Channelsurge	5	68.8	3	167	3.6× / 1.4
Missiles · North Pacific Ocean	5	60	2	31	1.0× / 4.8
Exercises · Laccadive Sea	5	53.1	1	33	0.7× / 7.6
Cable ops · North Atlantic Oceansurge	5	49.2	2	33	2.1× / 2.4
Quakes · Indian Ocean	5	12.6	1	28	0.7× / 7
Nav aids · North Pacific Oceansurge	5	7.7	0	—	8.3× / 0.6
Spills · North Atlantic Ocean	4	54	3	37	1.8× / 2.2
Surveys · North Seasurge	4	33.5	1	48	2.9× / 1.4
Surveys · Irish Sea and St. George's Channelsurge	4	32.6	0	—	20× / 0.2
Exercises · South China Seasurge	4	27.9	3	28	2.2× / 1.8
Quakes · North Pacific Ocean	4	12	0	—	1.2× / 3.4
Derelicts · South China Seasurge	4	7.6	1	36	2.5× / 1.6
Nav aids · Coral Sealong running	3	107	4	575	1.7× / 1.8
Other · Mediterranean Sea - Eastern Basinsurge	3	96.1	5	357	3.8× / 0.8
Incidents · Indian Ocean	3	66.8	3	35	0.9× / 3.4
Incidents · Caribbean Seanew	3	65.7	2	31	new / 0
Nav aids · Irish Sea and St. George's Channel	3	61.2	2	346	0.8× / 3.8
Exercises · Bay of Bengal	3	58.1	2	33	0.5× / 5.6
Exercises · Baltic Seasurge	3	17.8	0	—	3.0× / 1
Cable ops · Indian Oceansurge	3	15.2	1	18	15× / 0.2
Exercises · Indian Ocean	3	12.7	0	—	1.7× / 1.8
Derelicts · South Atlantic Ocean	3	7.7	1	5	1.7× / 1.8
Nav aids · Inner Seas off the West Coast of Scotlandsurge	3	2.5	0	—	2.1× / 1.4
Nav aids · Gulf of Alaskasurge	3	1	0	—	7.5× / 0.4
Cable ops · Norwegian Seanew	2	74.2	2	53	new / 0
Nav aids · South Pacific Ocean	2	57.9	2	31	1.0× / 2
Spills · North Pacific Ocean	2	45	1	32	1.7× / 1.2
Cable ops · Persian Gulf	2	36.6	1	38	1.7× / 1.2
Exercises · Gulf of Mexico	2	24.9	0	—	10× / 0.2
Incidents · South China Sea	2	24.8	0	—	0.5× / 4
Cable ops · Mediterranean Sea - Eastern Basin	2	23.8	2	16	0.8× / 2.4
Cable ops · Labrador Sea	2	20.8	1	20	2.0× / 1
Incidents · Philippine Sea	2	18.1	1	24	0.4× / 5.6
Wrecks · Coral Seanew	2	17.6	1	17	new / 0
Nav aids · Bering Seanew	2	15.9	2	8	new / 0
Exercises · Arabian Sea	2	11.8	0	—	0.6× / 3.2
Nav aids · Davis Straitnew	2	10.3	2	5	new / 0
Exercises · South Pacific Ocean	2	6.3	1	35	0.3× / 6.2
Quakes · Molukka Sea	2	6	0	—	3.3× / 0.6
Quakes · Eastern China Seanew	2	5.2	1	27	new / 0
Incidents · Coral Sea	2	5.1	0	—	1.4× / 1.4
Incidents · Tasman Sea	2	4.2	1	4	2.0× / 1
Exercises · Bering Sea	2	4.1	0	—	2.5× / 0.8
Other · North Sea	2	3.8	0	—	5.0× / 0.4
Cable ops · Philippine Seanew	2	3.6	1	4	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	2	3.5	0	—	5.0× / 0.4
Nav aids · Gulf of California	1	67.3	3	186	new / 0
Cable ops · Mediterranean Sea - Western Basin	1	66.4	3	79	new / 0
Other · Indian Ocean	1	62.7	2	126	1.0× / 1
Surveys · Mediterranean Sea - Eastern Basin	1	59.4	2	300	0.6× / 1.8
Ordnance · North Sea	1	52.6	2	334	0.8× / 1.2
Wrecks · Laccadive Sealong running	1	48.3	2	547	new / 0
Nav aids · Bay of Bengal	1	45.7	2	38	2.5× / 0.4
Nav aids · Sea of Okhotsk	1	43.4	2	84	new / 0
Surveys · Gulf of Suezlong running	1	34.2	2	609	1.7× / 0.6
Other · South Atlantic Ocean	1	33.3	1	219	0.7× / 1.4
Cable ops · Greenland Sea	1	30	1	35	new / 0
Incidents · Laccadive Sea	1	25.3	1	25	1.7× / 0.6
Incidents · Andaman or Burma Sea	1	25.1	1	25	new / 0
Cable ops · Makassar Strait	1	20.6	1	20	new / 0
Spills · Bering Sea	1	14	1	14	5.0× / 0.2
Other · Philippine Sea	1	12.9	0	—	5.0× / 0.2
Cable ops · Gulf of Mexico	1	12.5	0	—	1.7× / 0.6
Exercises · Caribbean Sea	1	12.1	0	—	5.0× / 0.2
Piracy · South China Sea	1	10.8	1	10	new / 0
Surveys · Alboran Sea	1	8.8	0	—	new / 0
Other · Adriatic Sea	1	8.3	1	8	new / 0
Other · North Pacific Ocean	1	8.1	0	—	new / 0
Other · Gulf of Aden	1	7.1	0	—	1.3× / 0.8
Cable ops · Eastern China Sea	1	6.7	0	—	2.5× / 0.4
Surveys · North Pacific Ocean	1	6.7	0	—	5.0× / 0.2
Cable ops · Celtic Sea	1	6.1	0	—	1.7× / 0.6
Surveys · Baltic Sea	1	5.6	0	—	new / 0
Exercises · Sea of Okhotsk	1	5.6	0	—	0.6× / 1.6
Nav aids · Great Australian Bight	1	5.1	0	—	1.0× / 1
Exercises · Adriatic Sea	1	4.9	0	—	2.5× / 0.4
Icebergs · Labrador Sea	1	4.9	0	—	new / 0
Surveys · North Atlantic Ocean	1	4.7	1	114	0.7× / 1.4
Nav aids · Celtic Sea	1	4.4	0	—	0.4× / 2.8
Other · Chukchi Sea	1	3.9	0	—	new / 0
Exercises · Andaman or Burma Sea	1	3.1	0	—	5.0× / 0.2
Quakes · Banda Sea	1	3	0	—	1.7× / 0.6
Quakes · Caribbean Sea	1	3	0	—	1.3× / 0.8
Derelicts · Gulf of Guinea	1	3	0	—	new / 0
Quakes · Makassar Strait	1	3	0	—	new / 0
Containers · North Atlantic Ocean	1	3	0	—	new / 0
Quakes · Norwegian Sea	1	3	0	—	5.0× / 0.2
Quakes · Solomon Sea	1	3	0	—	0.4× / 2.4
Quakes · Sulu Sea	1	3	0	—	new / 0
Incidents · Red Sea	1	2.7	0	—	new / 0
Spills · South Pacific Ocean	1	2	1	2	new / 0
Exercises · Coral Sea	1	1.9	1	1	new / 0
Debris · South China Sea	1	1.9	1	1	new / 0
Nav aids · Indian Ocean	1	1.6	0	—	0.8× / 1.2
Derelicts · North Atlantic Ocean	1	1.3	1	36	1.3× / 0.8
Quakes · Philippine Sea	1	0.9	1	0	0.2× / 4.6
Ordnance · Philippine Sea	1	0.8	0	—	new / 0
Nav aids · Gulf of Mexico	1	0.6	0	—	0.5× / 2.2
Incidents · Malacca Strait	1	0.4	0	—	new / 0
Incidents · Solomon Sea	1	0.4	0	—	5.0× / 0.2
Derelicts · Philippine Sea	1	0.3	0	—	5.0× / 0.2
Incidents · Gulf of Guinea	1	0.1	0	—	2.5× / 0.4
Incidents · Bay of Biscay	1	0	0	—	2.5× / 0.4
Debris · Indian Ocean	1	0	0	—	new / 0
Surveys · Beaufort Sealong running	0	690	23	2,092	0.0× / 0.4
Surveys · Arctic Oceanlong running	0	460	15	2,092	0.0× / 0.2
Surveys · Baffin Baylong running	0	150	5	2,190	0.0× / 0.2
Surveys · The Northwestern Passageslong running	0	150	5	1,075	0.0× / 0.8
Exercises · Aegean Sea	0	120	4	250	0.0× / 2.6
Nav aids · Gulf of Suezlong running	0	120	4	516	0.0× / 0.8
Wrecks · Inner Seas off the West Coast of Scotland	0	90	3	285	— / 0
Surveys · Laptev Sealong running	0	90	3	1,226	— / 0
Wrecks · The Northwestern Passageslong running	0	90	3	389	0.0× / 0.4
Surveys · South Atlantic Ocean	0	64	2	91	0.0× / 1.6
Nav aids · Malacca Straitlong running	0	60	2	443	0.0× / 0.2
Wrecks · North Atlantic Oceanlong running	0	60	2	491	0.0× / 0.2
Wrecks · Persian Gulf	0	60	2	320	0.0× / 0.4
Nav aids · Red Sealong running	0	55.7	1	376	0.0× / 0.4
Other · South China Sealong running	0	34.4	1	441	0.0× / 0.2
Cable ops · Adriatic Sea	0	30	1	30	0.0× / 0.4
Cable ops · Arabian Sea	0	30	1	72	0.0× / 1.2
Debris · Arctic Oceanlong running	0	30	1	1,744	— / 0
Other · Arctic Oceanlong running	0	30	1	757	0.0× / 0.2
Wrecks · Bay of Bengal	0	30	1	222	— / 0
Surveys · Bering Sea	0	30	1	349	0.0× / 0.2
Other · Bismarck Sea	0	30	1	287	— / 0
Cable ops · Black Sea	0	30	1	35	0.0× / 1
Surveys · Chukchi Sealong running	0	30	1	1,625	— / 0
Other · Coral Sea	0	30	1	314	— / 0
Surveys · Greenland Sealong running	0	30	1	2,408	— / 0
Ordnance · Gulf of Aden	0	30	1	198	— / 0
Spills · Indian Ocean	0	30	1	39	— / 0
Surveys · Malacca Straitlong running	0	30	1	421	0.0× / 0.2
Restricted · North Atlantic Ocean	0	30	1	153	0.0× / 0.6
Structures · North Atlantic Ocean	0	30	1	232	— / 0
Piracy · Persian Gulflong running	0	30	1	630	— / 0
Volcanic · Philippine Sea	0	30	1	144	— / 0
Surveys · Sea of Okhotsk	0	30	1	42	0.0× / 0.2
Towing · Sea of Okhotsk	0	30	1	42	— / 0
Nav aids · South China Sealong running	0	30	1	556	0.0× / 0.2
Wrecks · South China Sealong running	0	30	1	798	0.0× / 0.4
Surveys · Timor Sea	0	30	1	78	0.0× / 0.2
Surveys · Tyrrhenian Sea	0	30	1	30	0.0× / 0.4
Nav aids · Persian Gulf	0	25.7	0	—	— / 0
Cable ops · Gulf of Suez	0	20	0	—	0.0× / 0.4
Cable ops · Red Sea	0	18.4	0	—	— / 0
Cable ops · North Sea	0	17.7	0	—	0.0× / 1.6
Cable ops · Baffin Bay	0	17.5	0	—	— / 0
Incidents · Adriatic Sea	0	11.4	0	—	0.0× / 0.2
Incidents · Gulf of Thailand	0	11.4	0	—	— / 0
Incidents · Mediterranean Sea - Eastern Basin	0	11.4	0	—	0.0× / 2
Surveys · Persian Gulf	0	11.4	0	—	0.0× / 0.2
Surveys · Bay of Bengal	0	10	0	—	0.0× / 0.6
Spills · The Coastal Waters of Southeast Alaska and British Columbia	0	9	0	—	0.0× / 0.4
Spills · Caribbean Sea	0	7	0	—	— / 0
Cable ops · Sulu Sea	0	6	0	—	— / 0
Derelicts · Bay of Bengal	0	4.4	0	—	0.0× / 0.4
Incidents · Bay of Bengal	0	4.4	0	—	0.0× / 1
Incidents · Inner Seas off the West Coast of Scotland	0	4.4	0	—	— / 0
Incidents · South Pacific Ocean	0	4.4	0	—	0.0× / 6.8
Spills · Philippine Sea	0	2	0	—	— / 0
Surveys · Mediterranean Sea - Western Basin	0	0.6	0	—	0.0× / 0.2
Other · Irish Sea and St. George's Channel	0	0.5	0	—	— / 0
Icebergs · Southern Ocean	0	0	0	—	0.0× / 1.2

Cite: seahazards.com Sea Ledger, 2009-09, 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.