Sea Ledger, October 2009

2009-10-01 to 2009-10-31 · archive

issued: 455
warning-days in force: 8,263
in force at month end: 249
sea × type cells: 180

baseline: same month, previous 5 years (2008-10, 2007-10, 2006-10, 2005-10, 2004-10)

By type

type	issued	warning-days	in force at end
Exercises	114	967.9	19
Quakes	80	261.1	3
Nav aids	66	1,510.8	52
Cable ops	66	962.4	37
Incidents	57	921.8	26
Spills	16	263	10
Other	13	448.4	11
Surveys	9	2,021.4	64
Derelicts	7	19.8	0
Icebergs	7	22.5	0
Missiles	5	62	2
Piracy	5	67.9	2
Wrecks	3	460.9	14
Volcanic	2	42.7	2
Ordnance	2	92.3	3
Structures	1	31.8	1
Towing	1	12.4	0
Restricted	1	61.3	2
Debris	0	32.1	1

By sea and type · 180 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Quakes · Coral Seasurge	29	84.2	1	30	21× / 1.4
Quakes · South Pacific Oceansurge	22	86.4	0	—	2.9× / 7.6
Cable ops · South Atlantic Ocean	20	128.2	7	357	1.4× / 14
Exercises · North Pacific Oceansurge	19	96.1	1	35	2.8× / 6.8
Exercises · South Atlantic Oceansurge	17	168.3	3	66	2.2× / 7.8
Nav aids · South Atlantic Oceansurgelong running	12	398.1	13	711	4.6× / 2.6
Incidents · North Pacific Ocean	11	128.2	3	55	1.6× / 6.8
Nav aids · North Sea	11	110.9	6	233	1.9× / 5.8
Incidents · South Pacific Ocean	9	123.3	5	28	0.8× / 11.2
Cable ops · North Atlantic Oceansurge	9	75.2	4	56	4.1× / 2.2
Incidents · South Atlantic Oceansurge	9	38.7	2	31	3.0× / 3
Incidents · North Atlantic Oceansurge	8	304.2	7	64	3.3× / 2.4
Exercises · North Atlantic Ocean	8	66.8	1	37	1.7× / 4.8
Exercises · Laccadive Sea	8	61.1	1	34	1.1× / 7
Exercises · Yellow Seasurge	8	56.8	2	38	2.5× / 3.2
Quakes · North Pacific Ocean	8	24	0	—	1.4× / 5.6
Nav aids · Gulf of Mexicosurge	8	16.5	0	—	3.3× / 2.4
Exercises · South China Seasurge	7	94.2	3	35	12× / 0.6
Exercises · Japan Seasurge	7	53.2	1	31	2.1× / 3.4
Exercises · Bay of Bengal	7	51.3	0	—	0.9× / 7.6
Exercises · South Pacific Oceansurge	7	33.9	0	—	2.1× / 3.4
Nav aids · North Atlantic Oceansurge	6	69.6	2	245	2.5× / 2.4
Exercises · Philippine Seasurge	6	48.9	1	35	5.0× / 1.2
Icebergs · South Atlantic Ocean	6	19.5	0	—	1.2× / 5
Nav aids · Gulf of Alaskasurge	6	5.4	1	30	6.0× / 1
Spills · Gulf of Mexico	5	92	3	42	0.9× / 5.6
Spills · North Atlantic Oceansurge	5	81	2	43	2.8× / 1.8
Cable ops · South China Sea	5	65.9	2	58	1.6× / 3.2
Missiles · North Pacific Ocean	5	62	2	34	0.9× / 5.6
Cable ops · North Pacific Oceansurge	5	25.1	0	—	25× / 0.2
Other · North Seasurge	5	7.1	0	—	2.5× / 2
Nav aids · North Pacific Oceansurge	4	46.2	2	21	2.9× / 1.4
Exercises · Gulf of Mexiconew	4	43.1	0	—	new / 0
Piracy · Indian Oceannew	4	23.4	1	25	new / 0
Cable ops · Celtic Seasurge	4	14.3	0	—	2.9× / 1.4
Quakes · Banda Seasurge	4	12	0	—	3.3× / 1.2
Exercises · Indian Oceansurge	4	5.6	0	—	10× / 0.4
Incidents · Caribbean Seanew	3	82	2	59	new / 0
Other · South Atlantic Oceansurge	3	67.7	1	250	2.5× / 1.2
Surveys · South Atlantic Ocean	3	60	3	122	0.6× / 5
Incidents · South China Sea	3	55.1	3	27	1.4× / 2.2
Cable ops · Singapore Straitsurge	3	49.3	2	30	7.5× / 0.4
Incidents · Gulf of Mexiconew	3	32.3	2	19	new / 0
Spills · North Pacific Oceansurge	3	26	2	37	5.0× / 0.6
Surveys · North Atlantic Oceansurge	3	22	1	31	5.0× / 0.6
Exercises · Sea of Okhotsksurge	3	20.8	0	—	3.8× / 0.8
Cable ops · Gulf of Mexicosurge	3	14.7	3	11	7.5× / 0.4
Cable ops · Arabian Seasurge	3	12.4	2	103	2.5× / 1.2
Derelicts · South China Seasurge	3	11.6	0	—	7.5× / 0.4
Quakes · Indian Ocean	3	11.4	0	—	0.8× / 3.8
Nav aids · Celtic Seasurge	3	11.1	1	24	2.1× / 1.4
Quakes · Celebes Seasurge	3	9	0	—	7.5× / 0.4
Incidents · Davis Straitnew	3	2.7	1	23	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbiasurge	3	2.7	0	—	3.8× / 0.8
Cable ops · Gulf of Guinea	2	127.3	3	52	10× / 0.2
Cable ops · Mediterranean Sea - Western Basin	2	100.3	4	110	10× / 0.2
Nav aids · Irish Sea and St. George's Channellong running	2	74.4	3	377	0.9× / 2.2
Incidents · Indian Ocean	2	69	0	—	0.7× / 2.8
Nav aids · Gulf of Californianew	2	38.2	1	217	new / 0
Nav aids · Inner Seas off the West Coast of Scotland	2	30.2	1	29	1.4× / 1.4
Cable ops · Caribbean Sea	2	27.5	1	27	3.3× / 0.6
Volcanic · South Pacific Oceannew	2	11.7	1	11	new / 0
Cable ops · North Sea	2	10.2	0	—	1.4× / 1.4
Quakes · Philippine Sea	2	8.1	0	—	0.7× / 3
Exercises · Black Sea	2	5.5	1	5	0.9× / 2.2
Exercises · Bering Sea	2	4.8	0	—	10× / 0.2
Other · North Pacific Ocean	2	4.2	0	—	10× / 0.2
Incidents · Coral Sea	2	1.6	0	—	0.7× / 2.8
Nav aids · Sea of Okhotsk	1	69.6	2	115	5.0× / 0.2
Wrecks · Inner Seas off the West Coast of Scotland	1	64.5	1	316	2.5× / 0.4
Other · Indian Ocean	1	62.3	1	157	1.7× / 0.6
Restricted · North Atlantic Ocean	1	61.3	2	184	0.5× / 2
Surveys · Gulf of Suezlong running	1	59.7	2	640	1.7× / 0.6
Cable ops · Mediterranean Sea - Eastern Basin	1	57.4	2	47	0.3× / 3
Wrecks · South China Sealong running	1	54.4	2	829	2.5× / 0.4
Surveys · Gulf of Guinea	1	30.2	1	30	5.0× / 0.2
Nav aids · South Pacific Ocean	1	25.8	1	62	0.6× / 1.6
Cable ops · Gulf of Suez	1	24.8	1	24	1.3× / 0.8
Incidents · Mediterranean Sea - Eastern Basin	1	20.2	0	—	0.7× / 1.4
Incidents · Philippine Sea	1	16.1	1	47	0.2× / 5.8
Exercises · Gulf of California	1	15.6	0	—	new / 0
Other · Tasman Sea	1	15.2	0	—	5.0× / 0.2
Other · North Atlantic Ocean	1	14.9	1	14	1.7× / 0.6
Spills · Gulf of Alaska	1	14	0	—	new / 0
Piracy · South China Sea	1	13.5	0	—	1.7× / 0.6
Towing · Sea of Okhotsk	1	12.4	0	—	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	11.5	1	11	5.0× / 0.2
Ordnance · Sea of Azov	1	9.7	1	9	new / 0
Cable ops · Java Sea	1	9.6	1	9	5.0× / 0.2
Cable ops · South Pacific Ocean	1	8.3	0	—	5.0× / 0.2
Cable ops · Philippine Sea	1	7.9	1	34	5.0× / 0.2
Exercises · Baltic Sea	1	7.1	0	—	1.0× / 1
Incidents · Bismarck Sea	1	6.1	0	—	new / 0
Spills · Caribbean Sea	1	5	1	5	1.3× / 0.8
Exercises · Andaman or Burma Sea	1	4.4	0	—	1.3× / 0.8
Nav aids · Mediterranean Sea - Eastern Basin	1	4.2	0	—	5.0× / 0.2
Exercises · Arabian Sea	1	3.8	0	—	0.3× / 3
Quakes · Arctic Ocean	1	3	0	—	5.0× / 0.2
Quakes · Bering Sea	1	3	0	—	new / 0
Derelicts · Indian Ocean	1	3	0	—	1.7× / 0.6
Quakes · Java Sea	1	3	0	—	new / 0
Quakes · Molukka Sea	1	3	0	—	2.5× / 0.4
Quakes · Sea of Okhotsk	1	3	0	—	new / 0
Quakes · Solomon Sea	1	3	0	—	0.6× / 1.8
Quakes · South Atlantic Ocean	1	3	0	—	1.0× / 1
Icebergs · South Pacific Ocean	1	3	0	—	1.3× / 0.8
Derelicts · South Atlantic Ocean	1	2.9	0	—	0.6× / 1.6
Quakes · Eastern China Sea	1	2.5	1	33	5.0× / 0.2
Quakes · Gulf of Mexico	1	2.5	1	2	new / 0
Exercises · Baffin Bay	1	2.3	1	2	new / 0
Spills · Bering Sea	1	2	1	45	1.3× / 0.8
Nav aids · Bristol Channel	1	1.7	0	—	1.7× / 0.6
Nav aids · Great Australian Bight	1	1.5	0	—	1.7× / 0.6
Ordnance · English Channel	1	1.1	0	—	new / 0
Surveys · Laccadive Sea	1	1	0	—	new / 0
Wrecks · The Coastal Waters of Southeast Alaska and British Columbia	1	1	0	—	new / 0
Structures · Mediterranean Sea - Eastern Basin	1	0.8	0	—	new / 0
Cable ops · Bay of Bengal	1	0.6	1	0	1.3× / 0.8
Nav aids · Arafura Sea	1	0.5	0	—	5.0× / 0.2
Derelicts · Bay of Biscay	1	0.5	0	—	new / 0
Incidents · Arafura Sea	1	0.1	0	—	0.8× / 1.2
Derelicts · South Pacific Ocean	1	0.1	0	—	5.0× / 0.2
Surveys · Beaufort Sealong running	0	713	23	2,123	0.0× / 3.8
Surveys · Arctic Oceanlong running	0	465	15	2,123	0.0× / 2
Surveys · Baffin Baylong running	0	155	5	2,221	— / 0
Surveys · The Northwestern Passageslong running	0	155	5	1,106	0.0× / 0.4
Exercises · Aegean Sea	0	124	4	281	0.0× / 2
Nav aids · Gulf of Suezlong running	0	124	4	547	0.0× / 0.8
Other · Mediterranean Sea - Eastern Basinlong running	0	122	3	388	0.0× / 0.6
Nav aids · Coral Sealong running	0	94.8	2	606	0.0× / 1.2
Nav aids · English Channel	0	93	3	198	0.0× / 3
Surveys · Laptev Sealong running	0	93	3	1,257	0.0× / 0.2
Wrecks · The Northwestern Passageslong running	0	93	3	420	— / 0
Nav aids · Bay of Bengal	0	62	2	69	0.0× / 0.2
Nav aids · Bering Sea	0	62	2	39	— / 0
Wrecks · Laccadive Sealong running	0	62	2	578	— / 0
Nav aids · Malacca Straitlong running	0	62	2	474	0.0× / 0.2
Wrecks · North Atlantic Oceanlong running	0	62	2	522	0.0× / 0.2
Wrecks · Persian Gulf	0	62	2	351	0.0× / 0.4
Surveys · Mediterranean Sea - Eastern Basin	0	60.4	0	—	0.0× / 2.2
Ordnance · North Sealong running	0	50.5	1	365	0.0× / 1.2
Cable ops · Norwegian Sea	0	40.5	1	78	0.0× / 0.2
Nav aids · Davis Strait	0	32.9	1	36	— / 0
Other · Adriatic Sea	0	31	1	39	— / 0
Debris · Arctic Oceanlong running	0	31	1	1,775	— / 0
Other · Arctic Oceanlong running	0	31	1	788	— / 0
Wrecks · Bay of Bengal	0	31	1	253	— / 0
Surveys · Bering Sealong running	0	31	1	380	0.0× / 0.2
Other · Bismarck Sea	0	31	1	318	— / 0
Cable ops · Black Sea	0	31	1	66	0.0× / 0.4
Surveys · Chukchi Sealong running	0	31	1	1,656	— / 0
Other · Coral Sea	0	31	1	345	0.0× / 0.4
Wrecks · Coral Sea	0	31	1	45	0.0× / 0.2
Surveys · Greenland Sealong running	0	31	1	2,439	— / 0
Ordnance · Gulf of Aden	0	31	1	229	— / 0
Spills · Indian Ocean	0	31	1	70	— / 0
Surveys · Malacca Straitlong running	0	31	1	452	— / 0
Structures · North Atlantic Ocean	0	31	1	263	— / 0
Cable ops · Persian Gulf	0	31	1	47	— / 0
Piracy · Persian Gulflong running	0	31	1	661	— / 0
Volcanic · Philippine Sea	0	31	1	175	0.0× / 0.4
Nav aids · Red Sealong running	0	31	1	407	— / 0
Surveys · Sea of Okhotsk	0	31	1	73	0.0× / 0.8
Nav aids · South China Sealong running	0	31	1	587	0.0× / 0.2
Other · South China Sealong running	0	31	1	472	— / 0
Surveys · Timor Sea	0	31	1	109	— / 0
Cable ops · Greenland Sea	0	29.4	0	—	— / 0
Cable ops · Labrador Sea	0	29.4	0	—	0.0× / 0.2
Incidents · Andaman or Burma Sea	0	23.4	0	—	0.0× / 0.2
Cable ops · Makassar Strait	0	20.6	0	—	— / 0
Incidents · Laccadive Sea	0	16.4	0	—	0.0× / 0.2
Surveys · Tyrrhenian Sea	0	16.4	0	—	0.0× / 0.4
Cable ops · Indian Ocean	0	16	0	—	0.0× / 0.8
Spills · South Pacific Ocean	0	12	0	—	— / 0
Cable ops · Adriatic Sea	0	5.5	0	—	0.0× / 0.2
Surveys · North Sea	0	4.7	0	—	0.0× / 0.8
Incidents · Tasman Sea	0	2.4	0	—	0.0× / 2.6
Derelicts · North Atlantic Ocean	0	1.7	0	—	0.0× / 0.8
Debris · South China Sea	0	1.1	0	—	— / 0
Exercises · Coral Sea	0	0.3	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2009-10, 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.