Sea Ledger, August 2009

2009-08-01 to 2009-08-31 · archive

issued: 377
warning-days in force: 7,231
in force at month end: 232
sea × type cells: 184

baseline: same month, previous 5 years (2008-08, 2007-08, 2006-08, 2005-08, 2004-08)

By type

type	issued	warning-days	in force at end
Cable ops	84	880	30
Exercises	84	671.4	21
Nav aids	50	1,278.8	38
Quakes	41	127.1	1
Incidents	34	457	16
Spills	22	245.4	12
Surveys	15	2,262.1	73
Derelicts	12	68.3	3
Other	11	383.4	12
Missiles	6	62	2
Icebergs	5	36.5	3
Piracy	3	62.2	1
Towing	3	23.4	1
Wrecks	3	411.2	13
Containers	2	13	0
Debris	2	36.7	1
Volcanic	0	87.8	1
Ordnance	0	62	2
Structures	0	31.4	1
Restricted	0	31	1

By sea and type · 184 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceansurge	45	292.6	8	296	7.3× / 6.2
Exercises · North Pacific Ocean	14	104.9	1	35	1.2× / 11.4
Quakes · South Pacific Ocean	12	38.6	1	32	1.2× / 10
Exercises · South Atlantic Oceansurge	11	61.5	4	33	2.0× / 5.4
Spills · Gulf of Mexico	8	109	4	43	1.8× / 4.4
Exercises · Japan Seasurge	8	53.7	2	32	3.3× / 2.4
Exercises · North Atlantic Ocean	8	38.2	0	—	0.9× / 8.6
Nav aids · South Atlantic Oceanlong running	7	278.9	9	650	1.8× / 3.8
Cable ops · South China Sea	7	100.8	4	78	1.9× / 3.6
Incidents · South Pacific Ocean	7	55.4	1	37	0.7× / 9.6
Incidents · South Atlantic Ocean	7	47.6	1	75	1.8× / 4
Quakes · Philippine Seasurge	7	21	0	—	3.9× / 1.8
Exercises · Philippine Seasurge	6	69.1	1	32	2.3× / 2.6
Missiles · North Pacific Ocean	6	62	2	36	1.0× / 6
Exercises · Laccadive Sea	6	54.5	2	34	0.8× / 7.4
Exercises · South Pacific Oceansurge	6	25.6	1	30	3.0× / 2
Exercises · Gulf of Mexicosurge	6	24.7	0	—	15× / 0.4
Nav aids · North Sea	5	132.7	3	188	1.3× / 3.8
Spills · North Atlantic Oceansurge	5	58	2	44	5.0× / 1
Spills · North Pacific Oceansurge	5	45	2	27	5.0× / 1
Exercises · Bay of Bengal	5	36.3	2	32	1.0× / 5
Cable ops · North Atlantic Ocean	5	29.3	1	23	1.3× / 4
Derelicts · South China Seasurge	5	23.7	1	30	5.0× / 1
Cable ops · Norwegian Seanew	4	79.1	3	70	new / 0
Nav aids · Irish Sea and St. George's Channelsurge	4	41.5	2	316	2.0× / 2
Cable ops · North Seasurge	4	39.3	1	31	6.7× / 0.6
Exercises · Yellow Sea	4	33.6	1	32	1.3× / 3
Icebergs · Southern Oceansurge	4	32.5	2	34	5.0× / 0.8
Nav aids · The Coastal Waters of Southeast Alaska and British Columbiasurge	4	29.1	0	—	2.0× / 2
Exercises · Arabian Seasurge	4	12.3	2	30	2.2× / 1.8
Quakes · Gulf of Californiasurge	4	12	0	—	20× / 0.2
Quakes · Indian Ocean	4	12	0	—	1.8× / 2.2
Incidents · North Pacific Ocean	3	110.2	3	62	0.3× / 10.6
Nav aids · North Atlantic Ocean	3	94.2	3	184	1.5× / 2
Surveys · North Atlantic Oceansurge	3	59.1	1	84	2.1× / 1.4
Cable ops · Mediterranean Sea - Western Basinsurge	3	48.3	2	49	7.5× / 0.4
Incidents · North Atlantic Ocean	3	48	1	70	0.8× / 3.8
Towing · Sea of Okhotsksurge	3	23.4	1	23	15× / 0.2
Surveys · Alboran Seanew	3	22.4	0	—	new / 0
Derelicts · North Atlantic Ocean	3	19.2	1	30	1.7× / 1.8
Quakes · North Pacific Ocean	3	9.6	0	—	0.4× / 7
Nav aids · North Pacific Oceansurge	3	4.3	0	—	15× / 0.2
Nav aids · Gulf of Mexicosurge	3	2.7	0	—	3.8× / 0.8
Incidents · Coral Sea	3	2.5	1	18	1.3× / 2.4
Nav aids · Great Australian Bightsurge	3	2.3	0	—	2.5× / 1.2
Nav aids · Coral Sealong running	2	98.7	3	545	1.3× / 1.6
Other · Indian Oceannewlong running	2	97.8	2	439	new / 0
Nav aids · English Channel	2	63.1	2	137	1.7× / 1.2
Nav aids · Gulf of Californianew	2	61.6	2	156	new / 0
Cable ops · Gulf of Mexico	2	50.5	1	251	5.0× / 0.4
Cable ops · Ligurian Seanew	2	37.9	0	—	new / 0
Incidents · South China Sea	2	37	1	55	1.0× / 2
Surveys · Sea of Okhotsk	2	29.9	1	37	2.0× / 1
Cable ops · Black Sea	2	26.5	1	26	3.3× / 0.6
Surveys · Mediterranean Sea - Western Basinnew	2	24.8	1	32	new / 0
Incidents · Philippine Sea	2	19.5	0	—	0.3× / 6.6
Piracy · South China Seanew	2	18.5	0	—	new / 0
Incidents · Indian Ocean	2	13.4	2	68	1.3× / 1.6
Other · North Sea	2	10.2	0	—	0.7× / 2.8
Quakes · Bay of Bengal	2	6	0	—	5.0× / 0.4
Quakes · Coral Sea	2	6	0	—	1.4× / 1.4
Nav aids · Indian Ocean	2	4.7	0	—	0.9× / 2.2
Surveys · Tyrrhenian Sea	2	3.5	1	3	3.3× / 0.6
Nav aids · Gulf of Suezlong running	1	123.7	4	486	new / 0
Other · Mediterranean Sea - Eastern Basin	1	69.5	3	327	0.7× / 1.4
Surveys · South Atlantic Ocean	1	66.3	3	61	0.5× / 2
Other · South China Sealong running	1	44	2	411	1.3× / 0.8
Nav aids · Arabian Sea	1	34.5	0	—	0.6× / 1.8
Cable ops · Sulu Sea	1	31	1	47	5.0× / 0.2
Surveys · North Sea	1	18.1	1	18	0.7× / 1.4
Incidents · Gulf of Thailand	1	17.7	1	17	new / 0
Cable ops · Gulf of Guinea	1	17.6	1	17	5.0× / 0.2
Other · Adriatic Sea	1	15.3	0	—	new / 0
Cable ops · Bismarck Sea	1	15.3	0	—	new / 0
Exercises · Gulf of California	1	15.1	0	—	new / 0
Nav aids · Celtic Sea	1	15	1	34	0.7× / 1.4
Nav aids · Inner Seas off the West Coast of Scotland	1	14.8	0	—	0.5× / 2.2
Cable ops · Solomon Sea	1	14.4	0	—	new / 0
Cable ops · Baffin Bay	1	12.4	1	12	new / 0
Spills · Philippine Sea	1	12	1	12	new / 0
Spills · Indian Ocean	1	9.4	1	9	new / 0
Nav aids · Bay of Bengal	1	8.7	1	8	2.5× / 0.4
Cable ops · Gulf of Suez	1	8.7	1	8	5.0× / 0.2
Cable ops · Persian Gulf	1	8.7	1	8	1.7× / 0.6
Nav aids · Tasman Sea	1	7.8	0	—	0.8× / 1.2
Spills · Caribbean Sea	1	7	1	7	5.0× / 0.2
Derelicts · Tyrrhenian Sea	1	6.9	0	—	1.0× / 1
Containers · Bering Sea	1	6.7	0	—	new / 0
Derelicts · Mediterranean Sea - Eastern Basin	1	6.4	0	—	0.4× / 2.6
Derelicts · South Pacific Ocean	1	6.4	0	—	1.7× / 0.6
Other · Irish Sea and St. George's Channel	1	6.3	1	6	5.0× / 0.2
Containers · North Atlantic Ocean	1	6.3	0	—	5.0× / 0.2
Cable ops · Greenland Sea	1	6	1	5	new / 0
Derelicts · Bay of Bengal	1	5.7	1	5	1.7× / 0.6
Wrecks · Davis Strait	1	5.7	0	—	new / 0
Other · South Pacific Ocean	1	5.4	0	—	1.3× / 0.8
Piracy · Gulf of Guinea	1	5.3	0	—	new / 0
Exercises · Bering Sea	1	5.1	0	—	5.0× / 0.2
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	5	1	5	1.0× / 1
Incidents · Mediterranean Sea - Eastern Basin	1	4.3	1	4	0.5× / 2
Exercises · South China Sea	1	4.2	0	—	5.0× / 0.2
Exercises · Andaman or Burma Sea	1	4	0	—	1.3× / 0.8
Icebergs · Labrador Sea	1	4	1	4	new / 0
Quakes · Solomon Sea	1	3.9	0	—	0.8× / 1.2
Debris · English Channel	1	3.6	0	—	5.0× / 0.2
Other · Persian Gulf	1	3.6	0	—	1.3× / 0.8
Exercises · Sea of Okhotsk	1	3.6	1	3	1.7× / 0.6
Nav aids · Gulf of Alaska	1	3.5	0	—	1.7× / 0.6
Surveys · Bay of Bengal	1	3.4	1	3	1.0× / 1
Quakes · Banda Sea	1	3	0	—	1.0× / 1
Quakes · Bismarck Sea	1	3	0	—	1.7× / 0.6
Quakes · Molukka Sea	1	3	0	—	1.0× / 1
Quakes · Norwegian Sea	1	3	0	—	new / 0
Quakes · South Atlantic Ocean	1	3	0	—	0.5× / 2.2
Quakes · Tasman Sea	1	3	0	—	new / 0
Cable ops · Red Sea	1	2.6	1	2	1.7× / 0.6
Debris · Indian Ocean	1	2.1	0	—	2.5× / 0.4
Wrecks · Indian Ocean	1	2.1	0	—	5.0× / 0.2
Nav aids · South Pacific Ocean	1	1.6	1	1	0.4× / 2.4
Incidents · Adriatic Sea	1	1.3	1	1	5.0× / 0.2
Incidents · Caribbean Sea	1	1.1	1	1	new / 0
Exercises · Coral Sea	1	1	0	—	5.0× / 0.2
Nav aids · Bering Sea	1	0.4	0	—	0.8× / 1.2
Cable ops · Adriatic Sea	1	0.3	1	0	5.0× / 0.2
Incidents · Great Australian Bight	1	0.3	0	—	2.5× / 0.4
Other · North Pacific Ocean	1	0.3	0	—	1.3× / 0.8
Wrecks · Arafura Sea	1	0	0	—	new / 0
Nav aids · Bristol Channel	1	0	0	—	new / 0
Surveys · Beaufort Sealong running	0	744	24	2,062	— / 0
Surveys · Arctic Oceanlong running	0	496	16	2,062	0.0× / 0.4
Surveys · Baffin Baylong running	0	186	6	2,160	— / 0
Surveys · The Northwestern Passageslong running	0	186	6	1,045	— / 0
Exercises · Aegean Sea	0	124	4	220	0.0× / 1.2
Wrecks · Inner Seas off the West Coast of Scotland	0	93.4	3	255	0.0× / 0.4
Surveys · Laptev Sealong running	0	93	3	1,196	— / 0
Wrecks · The Northwestern Passages	0	93	3	359	— / 0
Nav aids · Sea of Okhotsk	0	69	1	231	— / 0
Nav aids · Malacca Straitlong running	0	62	2	413	0.0× / 0.2
Wrecks · North Atlantic Oceanlong running	0	62	2	461	— / 0
Wrecks · Persian Gulf	0	62	2	290	— / 0
Nav aids · Red Sea	0	62	2	346	0.0× / 0.2
Volcanic · Indian Ocean	0	56.8	0	—	— / 0
Surveys · Mediterranean Sea - Eastern Basin	0	52.4	1	270	0.0× / 1.6
Cable ops · Arabian Sea	0	32.3	1	79	0.0× / 0.4
Incidents · Bay of Bengal	0	31.4	1	38	0.0× / 1.4
Debris · Arctic Oceanlong running	0	31	1	1,714	— / 0
Other · Arctic Oceanlong running	0	31	1	727	0.0× / 0.4
Wrecks · Bay of Bengal	0	31	1	192	0.0× / 0.6
Surveys · Bering Sea	0	31	1	319	— / 0
Other · Bismarck Sea	0	31	1	257	— / 0
Surveys · Chukchi Sealong running	0	31	1	1,595	— / 0
Other · Coral Sea	0	31	1	284	— / 0
Surveys · Greenland Sealong running	0	31	1	2,378	— / 0
Ordnance · Gulf of Aden	0	31	1	168	— / 0
Surveys · Gulf of Suezlong running	0	31	1	579	— / 0
Incidents · Inner Seas off the West Coast of Scotland	0	31	1	41	— / 0
Surveys · Irish Sea and St. George's Channel	0	31	1	31	0.0× / 0.2
Wrecks · Laccadive Sealong running	0	31	1	517	— / 0
Surveys · Malacca Straitlong running	0	31	1	391	0.0× / 0.4
Restricted · North Atlantic Ocean	0	31	1	123	0.0× / 0.2
Structures · North Atlantic Ocean	0	31	1	202	— / 0
Ordnance · North Sea	0	31	1	304	0.0× / 0.6
Nav aids · Persian Gulf	0	31	1	286	0.0× / 0.6
Piracy · Persian Gulflong running	0	31	1	600	— / 0
Surveys · Persian Gulflong running	0	31	1	370	0.0× / 0.4
Volcanic · Philippine Sea	0	31	1	114	0.0× / 0.2
Other · South Atlantic Ocean	0	31	1	189	0.0× / 0.4
Nav aids · South China Sealong running	0	31	1	526	— / 0
Wrecks · South China Sealong running	0	31	1	768	0.0× / 0.8
Surveys · Timor Sea	0	31	1	48	— / 0
Incidents · Bay of Biscay	0	28.9	0	—	0.0× / 0.8
Surveys · Gulf of Guinea	0	13.4	0	—	0.0× / 0.4
Surveys · Inner Seas off the West Coast of Scotland	0	11.8	0	—	— / 0
Cable ops · Mediterranean Sea - Eastern Basin	0	9.5	0	—	0.0× / 2.4
Cable ops · Tasman Sea	0	9.2	0	—	— / 0
Cable ops · Celtic Sea	0	7.7	0	—	0.0× / 0.6
Piracy · Indian Ocean	0	7.4	0	—	— / 0
Incidents · Mozambique Channel	0	7.4	0	—	0.0× / 0.8
Other · Caribbean Sea	0	6.6	0	—	0.0× / 1
Surveys · Balearic (Iberian Sea)	0	3.6	0	—	— / 0
Other · Gulf of Aden	0	0.4	0	—	0.0× / 0.8
Structures · North Sea	0	0.4	0	—	0.0× / 0.2
Surveys · Tasman Sea	0	0.4	0	—	— / 0
Cable ops · Singapore Strait	0	0	0	—	0.0× / 1.2

Cite: seahazards.com Sea Ledger, 2009-08, 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.