Sea Ledger, November 2009

2009-11-01 to 2009-11-30 · archive

issued: 407
warning-days in force: 8,052
in force at month end: 269
sea × type cells: 191

baseline: same month, previous 5 years (2008-11, 2007-11, 2006-11, 2005-11, 2004-11)

By type

type	issued	warning-days	in force at end
Exercises	98	916.4	28
Nav aids	60	1,507.6	49
Incidents	53	813.4	26
Cable ops	53	1,099.4	40
Quakes	36	107.8	5
Derelicts	26	78.8	2
Piracy	18	207.2	9
Surveys	12	1,953.4	69
Spills	12	255	5
Other	11	363.8	14
Icebergs	8	21	0
Missiles	6	60	2
Debris	6	44.9	1
Containers	5	15	0
Wrecks	2	423.6	14
Ordnance	1	70.5	2
Volcanic	0	40.7	1
Structures	0	13.4	0
Restricted	0	60	2

By sea and type · 191 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceansurgelong running	29	226.8	9	387	2.0× / 14.2
Piracy · Indian Oceansurge	14	123.2	6	32	70× / 0.2
Exercises · Bay of Bengal	13	59.4	2	28	1.6× / 8.4
Exercises · North Pacific Ocean	12	98.9	4	34	1.9× / 6.2
Quakes · South Pacific Ocean	12	35.6	1	29	0.8× / 14.6
Incidents · North Atlantic Oceansurge	11	201.2	6	65	2.0× / 5.4
Exercises · South Atlantic Ocean	10	100.4	5	47	1.7× / 5.8
Incidents · North Pacific Ocean	9	85.7	5	32	1.3× / 6.8
Exercises · South Pacific Oceansurge	9	42.7	1	29	2.6× / 3.4
Nav aids · South Atlantic Oceansurgelong running	8	396.8	12	741	2.2× / 3.6
Exercises · South China Seasurge	8	95.6	2	33	40× / 0.2
Exercises · Laccadive Sea	8	58.5	2	33	1.1× / 7.6
Exercises · North Atlantic Ocean	7	56.6	2	59	1.1× / 6.4
Nav aids · Irish Sea and St. George's Channellong running	6	101.7	3	407	1.9× / 3.2
Incidents · South China Sea	6	101.7	3	57	1.4× / 4.4
Exercises · Philippine Seasurge	6	76.3	1	33	6.0× / 1
Missiles · North Pacific Ocean	6	60	2	36	1.2× / 5
Exercises · Yellow Sea	6	53.1	1	33	1.3× / 4.6
Exercises · Japan Seasurge	6	49.1	1	33	3.0× / 2
Icebergs · South Atlantic Ocean	6	18	0	—	1.8× / 3.4
Nav aids · Gulf of Mexicosurge	6	14.8	1	20	10× / 0.6
Nav aids · North Sea	5	87.8	3	263	1.1× / 4.4
Nav aids · North Atlantic Ocean	5	63.2	2	275	1.0× / 4.8
Incidents · South Atlantic Ocean	5	53.4	1	40	0.9× / 5.4
Nav aids · Celtic Seasurge	5	31.4	2	33	2.1× / 2.4
Derelicts · South China Seasurge	5	14.9	0	—	2.8× / 1.8
Derelicts · South Atlantic Oceansurge	5	13.6	1	9	13× / 0.4
Derelicts · North Atlantic Ocean	5	12	0	—	1.9× / 2.6
Cable ops · Gulf of Mexicosurge	4	156.6	7	41	6.7× / 0.6
Incidents · South Pacific Ocean	4	128.7	2	58	0.6× / 6.8
Nav aids · Coral Sealong running	4	70.6	3	636	0.9× / 4.2
Nav aids · Gulf of Californiasurge	4	65.3	4	51	3.3× / 1.2
Spills · North Atlantic Ocean	4	59	1	42	1.4× / 2.8
Incidents · Indian Ocean	4	40.3	2	28	0.7× / 6
Exercises · Arabian Seasurge	4	14.6	1	24	2.0× / 2
Quakes · North Pacific Ocean	4	12	0	—	0.3× / 13
Quakes · Philippine Seasurge	4	9.4	2	26	4.0× / 1
Incidents · Coral Seasurge	4	6.4	0	—	2.2× / 1.8
Nav aids · English Channel	3	92.1	4	228	1.1× / 2.8
Cable ops · North Atlantic Ocean	3	69.3	2	86	1.5× / 2
Spills · Gulf of Mexico	3	67	0	—	0.7× / 4.4
Nav aids · North Pacific Oceansurge	3	66	0	—	3.0× / 1
Cable ops · Bay of Bengal	3	51.3	2	30	1.5× / 2
Spills · North Pacific Oceansurge	3	50	3	32	2.1× / 1.4
Exercises · Gulf of Mexicosurge	3	40.8	0	—	15× / 0.2
Quakes · Coral Sea	3	11.8	0	—	1.1× / 2.8
Nav aids · Gulf of Alaskasurge	3	2.6	0	—	3.8× / 0.8
Surveys · South Atlantic Ocean	2	84.8	4	144	0.7× / 3
Cable ops · Mediterranean Sea - Eastern Basin	2	80.3	3	68	0.5× / 3.8
Cable ops · Arabian Sea	2	74.7	3	38	1.0× / 2
Cable ops · South China Sea	2	74.4	3	42	1.3× / 1.6
Other · South Atlantic Ocean	2	45.9	2	280	1.4× / 1.4
Surveys · Mediterranean Sea - Eastern Basin	2	27.3	2	22	2.0× / 1
Cable ops · South Pacific Oceannew	2	21.6	2	15	new / 0
Piracy · South China Seanew	2	18.6	0	—	new / 0
Incidents · Philippine Sea	2	14.4	0	—	0.4× / 4.8
Other · North Sea	2	12	1	11	10× / 0.2
Exercises · Baltic Sea	2	9.3	0	—	2.0× / 1
Derelicts · Arabian Seanew	2	6	0	—	new / 0
Debris · Arafura Sea	2	6	0	—	3.3× / 0.6
Derelicts · Celtic Sea	2	6	0	—	3.3× / 0.6
Quakes · South Atlantic Ocean	2	6	0	—	1.3× / 1.6
Quakes · Indian Ocean	2	5.7	1	21	0.6× / 3.6
Cable ops · English Channel	2	5.6	0	—	1.7× / 1.2
Derelicts · North Pacific Ocean	2	5.4	1	4	2.5× / 0.8
Icebergs · South Pacific Ocean	2	3	0	—	1.1× / 1.8
Debris · Indian Oceannew	2	2.9	0	—	new / 0
Nav aids · Gulf of Suezlong running	1	140.1	4	577	5.0× / 0.2
Other · Mediterranean Sea - Eastern Basinlong running	1	91	4	418	0.7× / 1.4
Incidents · Gulf of Mexico	1	62.6	1	49	new / 0
Wrecks · Laccadive Sealong running	1	62.6	2	608	new / 0
Incidents · Caribbean Sea	1	55.9	2	56	new / 0
Nav aids · Bay of Bengal	1	53.7	1	99	new / 0
Surveys · Gulf of Suezlong running	1	52	2	670	5.0× / 0.2
Nav aids · South Pacific Ocean	1	39.5	2	39	1.0× / 1
Other · Indian Ocean	1	37.7	1	187	5.0× / 0.2
Nav aids · Inner Seas off the West Coast of Scotland	1	31.2	1	59	0.5× / 2.2
Nav aids · Mediterranean Sea - Western Basin	1	30.5	1	41	1.7× / 0.6
Incidents · Arabian Sea	1	29.7	1	29	1.7× / 0.6
Exercises · Ionian Sea	1	29.7	1	29	2.5× / 0.4
Spills · Bering Sea	1	26	0	—	5.0× / 0.2
Surveys · Irish Sea and St. George's Channel	1	21.2	1	21	5.0× / 0.2
Cable ops · Singapore Strait	1	18.7	1	60	5.0× / 0.2
Piracy · Arabian Sea	1	18.1	1	18	new / 0
Piracy · Mozambique Channel	1	17.3	1	17	new / 0
Other · North Atlantic Ocean	1	15.7	0	—	5.0× / 0.2
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	14	0	—	5.0× / 0.2
Surveys · Gulf of Mexico	1	12.6	0	—	new / 0
Surveys · North Pacific Ocean	1	11.7	1	11	new / 0
Other · English Channel	1	11	1	11	new / 0
Incidents · Mediterranean Sea - Eastern Basin	1	9.7	1	9	0.6× / 1.8
Cable ops · North Pacific Ocean	1	9	0	—	1.3× / 0.8
Derelicts · Gulf of Mexico	1	8.9	0	—	new / 0
Nav aids · Great Australian Bight	1	7.4	0	—	0.8× / 1.2
Surveys · Indian Ocean	1	7.3	1	7	2.5× / 0.4
Incidents · Malacca Strait	1	6.9	1	6	new / 0
Surveys · Andaman or Burma Sea	1	6.7	0	—	new / 0
Surveys · Tasman Sea	1	5.8	1	5	5.0× / 0.2
Nav aids · Indian Ocean	1	5.4	0	—	2.5× / 0.4
Quakes · Arabian Sea	1	3	0	—	new / 0
Quakes · Bay of Bengal	1	3	0	—	2.5× / 0.4
Quakes · Bismarck Sea	1	3	0	—	0.6× / 1.6
Quakes · Flores Sea	1	3	0	—	2.5× / 0.4
Quakes · Gulf of Aden	1	3	0	—	new / 0
Derelicts · Indian Ocean	1	3	0	—	0.6× / 1.8
Quakes · Ionian Sea	1	3	0	—	new / 0
Containers · Mediterranean Sea - Eastern Basin	1	3	0	—	2.5× / 0.4
Derelicts · Mozambique Channel	1	3	0	—	new / 0
Containers · North Atlantic Ocean	1	3	0	—	0.8× / 1.2
Quakes · North Atlantic Ocean	1	3	0	—	5.0× / 0.2
Derelicts · Philippine Sea	1	3	0	—	new / 0
Debris · South Atlantic Ocean	1	3	0	—	1.7× / 0.6
Containers · South China Sea	1	3	0	—	new / 0
Quakes · South China Sea	1	3	0	—	5.0× / 0.2
Surveys · South China Sea	1	3	0	—	2.5× / 0.4
Containers · South Pacific Ocean	1	3	0	—	new / 0
Debris · South Pacific Ocean	1	3	0	—	5.0× / 0.2
Containers · Tasman Sea	1	3	0	—	new / 0
Derelicts · Tasman Sea	1	3	0	—	2.5× / 0.4
Exercises · Caribbean Sea	1	2.8	0	—	new / 0
Cable ops · Indian Ocean	1	2.5	0	—	2.5× / 0.4
Ordnance · North Pacific Ocean	1	2.1	0	—	new / 0
Incidents · Bering Sea	1	1.9	1	1	new / 0
Exercises · Gulf of Aden	1	1.6	1	1	new / 0
Quakes · Molukka Sea	1	1.5	1	1	5.0× / 0.2
Nav aids · Bristol Channel	1	1.3	0	—	1.7× / 0.6
Cable ops · North Sea	1	1.3	1	1	0.8× / 1.2
Wrecks · South Atlantic Ocean	1	1	0	—	1.7× / 0.6
Incidents · Tasman Sea	1	0.9	0	—	0.5× / 2
Exercises · Indian Ocean	1	0.8	0	—	1.3× / 0.8
Incidents · Celtic Sea	1	0.6	0	—	1.7× / 0.6
Other · North Pacific Ocean	1	0.4	0	—	5.0× / 0.2
Other · Philippine Sea	1	0.1	0	—	new / 0
Other · Bay of Biscay	1	0	0	—	5.0× / 0.2
Surveys · Beaufort Sealong running	0	690	23	2,153	— / 0
Surveys · Arctic Oceanlong running	0	450	15	2,153	— / 0
Surveys · Baffin Baylong running	0	150	5	2,251	— / 0
Surveys · The Northwestern Passageslong running	0	150	5	1,136	— / 0
Exercises · Aegean Sea	0	120	4	311	0.0× / 1.8
Cable ops · Mediterranean Sea - Western Basin	0	99.7	2	91	— / 0
Surveys · Laptev Sealong running	0	90	3	1,287	— / 0
Wrecks · The Northwestern Passageslong running	0	90	3	450	0.0× / 0.2
Cable ops · Gulf of Guinea	0	80	2	82	0.0× / 0.4
Nav aids · Malacca Straitlong running	0	60	2	504	— / 0
Restricted · North Atlantic Ocean	0	60	2	214	0.0× / 0.6
Wrecks · North Atlantic Oceanlong running	0	60	2	552	— / 0
Wrecks · Persian Gulflong running	0	60	2	381	0.0× / 0.2
Nav aids · Sea of Okhotsk	0	60	2	145	0.0× / 0.4
Wrecks · South China Sealong running	0	60	2	859	0.0× / 0.2
Other · Adriatic Sea	0	30	1	69	0.0× / 0.4
Debris · Arctic Oceanlong running	0	30	1	1,805	— / 0
Other · Arctic Oceanlong running	0	30	1	818	— / 0
Wrecks · Bay of Bengal	0	30	1	283	— / 0
Surveys · Bering Sealong running	0	30	1	410	— / 0
Other · Bismarck Sea	0	30	1	348	— / 0
Cable ops · Caribbean Sea	0	30	1	56	— / 0
Surveys · Chukchi Sealong running	0	30	1	1,686	— / 0
Other · Coral Sealong running	0	30	1	375	0.0× / 0.6
Wrecks · Coral Sea	0	30	1	75	— / 0
Surveys · Greenland Sealong running	0	30	1	2,469	— / 0
Ordnance · Gulf of Aden	0	30	1	259	— / 0
Surveys · Gulf of Guinea	0	30	1	60	0.0× / 0.4
Spills · Indian Ocean	0	30	1	100	— / 0
Wrecks · Inner Seas off the West Coast of Scotland	0	30	1	45	0.0× / 0.4
Cable ops · Java Sea	0	30	1	39	0.0× / 0.4
Surveys · Malacca Straitlong running	0	30	1	482	— / 0
Ordnance · North Sealong running	0	30	1	395	0.0× / 0.4
Cable ops · Persian Gulf	0	30	1	77	0.0× / 0.6
Piracy · Persian Gulflong running	0	30	1	691	0.0× / 0.2
Volcanic · Philippine Sea	0	30	1	205	0.0× / 0.4
Nav aids · Red Sealong running	0	30	1	437	0.0× / 1
Nav aids · South China Sealong running	0	30	1	617	— / 0
Other · South China Sealong running	0	30	1	502	0.0× / 0.4
Surveys · Timor Sea	0	30	1	139	— / 0
Cable ops · Black Sea	0	14	0	—	0.0× / 1
Nav aids · Davis Strait	0	13.4	0	—	— / 0
Incidents · Davis Strait	0	13.4	0	—	— / 0
Structures · North Atlantic Ocean	0	13.4	0	—	— / 0
Nav aids · Bering Sea	0	12.8	0	—	— / 0
Cable ops · Gulf of Suez	0	11	0	—	0.0× / 0.4
Surveys · North Atlantic Ocean	0	11	0	—	0.0× / 1.4
Volcanic · South Pacific Ocean	0	10.7	0	—	0.0× / 0.2
Cable ops · Norwegian Sea	0	9.6	0	—	— / 0
Spills · Caribbean Sea	0	9	0	—	0.0× / 0.2
Ordnance · Sea of Azov	0	8.4	0	—	— / 0
Exercises · Baffin Bay	0	3.6	0	—	— / 0
Cable ops · Philippine Sea	0	3	0	—	— / 0
Exercises · Black Sea	0	2.6	0	—	0.0× / 1
Quakes · Eastern China Sea	0	1.3	0	—	0.0× / 0.4
Quakes · Gulf of Mexico	0	0.5	0	—	— / 0
Surveys · Sea of Okhotsk	0	0	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2009-11, 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.