Sea Ledger, November 2010

2010-11-01 to 2010-11-30 · archive

issued: 446
warning-days in force: 8,229
in force at month end: 285
sea × type cells: 191

baseline: same month, previous 5 years (2009-11, 2008-11, 2007-11, 2006-11, 2005-11)

By type

type	issued	warning-days	in force at end
Exercises	81	856.4	28
Incidents	80	1,041.2	33
Piracy	68	841	28
Nav aids	58	1,543.5	49
Cable ops	47	904.1	36
Quakes	31	90.1	3
Missiles	24	152.5	7
Other	15	332.4	14
Derelicts	13	51.7	5
Surveys	11	1,539.7	52
Wrecks	6	605.8	22
Debris	5	13.6	1
Spills	2	49	0
Containers	2	6	0
Restricted	1	10.5	1
Icebergs	1	3	0
Ordnance	1	150.3	5
Towing	0	8.5	0
Volcanic	0	30	1

By sea and type · 191 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Piracy · Arabian Seasurge	34	316.6	19	43	170× / 0.2
Piracy · Indian Oceansurge	28	407.9	7	55	9.3× / 3
Incidents · North Pacific Oceansurge	25	315.2	14	49	3.0× / 8.2
Cable ops · South Atlantic Oceanlong running	25	237	11	752	1.4× / 18
Nav aids · North Seasurge	15	207.9	9	257	3.4× / 4.4
Incidents · North Atlantic Ocean	11	187.3	1	57	1.6× / 6.8
Exercises · Philippine Seasurge	10	101.9	5	34	4.5× / 2.2
Exercises · South Atlantic Ocean	10	86.3	0	—	1.3× / 7.6
Missiles · North Pacific Oceansurge	10	76	2	60	2.0× / 5
Exercises · Japan Seasurge	9	83.6	2	33	2.8× / 3.2
Incidents · Indian Ocean	9	56.9	4	27	1.6× / 5.8
Nav aids · South Atlantic Oceanlong running	8	287.9	10	832	1.7× / 4.8
Exercises · Arabian Seasurge	7	57.9	3	34	3.2× / 2.2
Exercises · Bay of Bengal	7	50.1	2	40	0.7× / 9.6
Nav aids · North Atlantic Oceanlong running	6	171.4	5	640	1.1× / 5.4
Incidents · South China Sea	6	146.4	7	36	1.1× / 5.6
Exercises · North Atlantic Ocean	6	68.7	2	75	1.1× / 5.6
Exercises · South Pacific Ocean	6	32	2	32	1.5× / 4
Incidents · South Pacific Ocean	5	46.5	1	54	0.7× / 7.2
Exercises · Laccadive Sea	5	39.6	1	34	0.7× / 7
Nav aids · Inner Seas off the West Coast of Scotlandsurge	5	35	1	52	2.3× / 2.2
Exercises · Mediterranean Sea - Eastern Basinsurge	5	30	1	27	3.1× / 1.6
Missiles · Barentsz Seanew	5	29.9	1	35	new / 0
Quakes · South Pacific Ocean	5	16.6	0	—	0.3× / 14.4
Quakes · Philippine Seasurge	5	12.9	1	25	5.0× / 1
Derelicts · North Atlantic Ocean	5	10	3	30	1.6× / 3.2
Exercises · South China Seasurge	4	102.6	4	34	2.2× / 1.8
Incidents · South Atlantic Ocean	4	75.2	1	54	0.7× / 5.8
Surveys · Arabian Seasurge	4	56.6	1	41	6.7× / 0.6
Nav aids · Celtic Sea	4	54.7	2	240	1.3× / 3
Exercises · North Pacific Ocean	4	54.1	1	34	0.6× / 7
Nav aids · English Channel	4	46.5	0	—	1.3× / 3.2
Exercises · Yellow Sea	4	37.9	1	33	0.7× / 5.4
Quakes · Solomon Sea	4	14.7	0	—	1.5× / 2.6
Quakes · North Pacific Ocean	4	6.9	2	26	0.4× / 11
Wrecks · North Seasurge	3	99.5	4	193	5.0× / 0.6
Cable ops · Arabian Sea	3	85.8	3	53	1.7× / 1.8
Cable ops · North Atlantic Ocean	3	77.9	2	50	1.1× / 2.6
Cable ops · Mediterranean Sea - Eastern Basin	3	61.2	4	132	0.8× / 3.6
Piracy · South China Seasurge	3	44.3	0	—	7.5× / 0.4
Cable ops · Black Seasurge	3	43.9	2	22	3.0× / 1
Incidents · Philippine Sea	3	25.2	1	28	0.6× / 5
Missiles · North Atlantic Oceannew	3	15.4	0	—	new / 0
Derelicts · Indian Ocean	3	8.6	0	—	1.5× / 2
Incidents · Coral Sea	3	7.7	0	—	1.4× / 2.2
Nav aids · North Pacific Ocean	3	6.1	0	—	1.9× / 1.6
Incidents · Tasman Sea	3	0.5	0	—	1.4× / 2.2
Cable ops · South China Sea	2	108.7	3	85	1.1× / 1.8
Surveys · South Atlantic Ocean	2	47.7	3	37	0.7× / 3
Nav aids · Gulf of Mexico	2	45.4	1	71	1.3× / 1.6
Piracy · Gulf of Adennew	2	41	0	—	new / 0
Cable ops · Caribbean Seanew	2	40.5	1	109	new / 0
Spills · Gulf of Mexico	2	34	0	—	0.4× / 5
Other · Sea of Azovnew	2	30	1	41	new / 0
Nav aids · Indian Ocean	2	17.9	1	17	3.3× / 0.6
Derelicts · South Pacific Ocean	2	11.7	2	5	3.3× / 0.6
Nav aids · Coral Sea	2	9.7	0	—	0.5× / 4
Incidents · Arabian Sea	2	7	1	10	3.3× / 0.6
Surveys · North Pacific Ocean	2	6.2	1	24	10× / 0.2
Quakes · Banda Sea	2	6	0	—	1.4× / 1.4
Containers · English Channelnew	2	6	0	—	new / 0
Quakes · Gulf of Aden	2	6	0	—	10× / 0.2
Debris · Indian Ocean	2	6	0	—	5.0× / 0.4
Quakes · Indian Ocean	2	6	0	—	0.5× / 4
Derelicts · Tasman Sea	2	6	0	—	5.0× / 0.4
Other · North Sea	2	5.7	1	18	5.0× / 0.4
Missiles · Bay of Bengalnew	2	5.5	1	9	new / 0
Debris · South Atlantic Ocean	2	4.6	1	15	2.5× / 0.8
Other · North Pacific Ocean	2	2.4	0	—	10× / 0.2
Wrecks · South China Sealong running	1	135.8	5	1,224	5.0× / 0.2
Nav aids · Bay of Bengal	1	97	3	105	5.0× / 0.2
Exercises · Aegean Sea	1	91.9	3	335	0.6× / 1.8
Wrecks · Arabian Sea	1	69.1	2	349	2.5× / 0.4
Other · Mediterranean Sea - Eastern Basin	1	49.4	1	322	0.7× / 1.4
Nav aids · Mediterranean Sea - Western Basin	1	42.7	1	127	1.3× / 0.8
Other · Persian Gulf	1	36.4	2	105	new / 0
Cable ops · Gulf of Guinea	1	35.3	2	81	2.5× / 0.4
Other · Gulf of Mexico	1	31.3	2	35	1.3× / 0.8
Nav aids · Rio de La Plata	1	28	1	28	new / 0
Surveys · Red Sea	1	27.7	1	27	new / 0
Incidents · Bay of Biscay	1	26.4	1	26	new / 0
Surveys · Bay of Bengal	1	25.5	1	53	5.0× / 0.2
Incidents · Bay of Bengal	1	22.4	1	22	1.7× / 0.6
Cable ops · Andaman or Burma Sea	1	21.4	1	21	2.5× / 0.4
Other · Japan Sea	1	17.5	1	17	new / 0
Cable ops · Gulf of Mexico	1	17.2	1	17	0.8× / 1.2
Incidents · Gulf of Aden	1	15.4	0	—	new / 0
Exercises · Baltic Sea	1	11.9	0	—	0.7× / 1.4
Cable ops · Bay of Bengal	1	11.4	1	11	0.4× / 2.6
Surveys · Gulf of Mexico	1	11	1	11	5.0× / 0.2
Nav aids · Tasman Sea	1	10	0	—	5.0× / 0.2
Missiles · South Pacific Ocean	1	9.3	0	—	5.0× / 0.2
Other · North Atlantic Ocean	1	8.6	1	38	2.5× / 0.4
Cable ops · North Sea	1	7.8	0	—	0.7× / 1.4
Missiles · Arctic Ocean	1	5.5	1	5	new / 0
Missiles · Norwegian Sea	1	5.5	1	5	new / 0
Other · Arabian Sea	1	5.4	1	5	new / 0
Missiles · South Atlantic Ocean	1	5	1	4	new / 0
Cable ops · Red Sea	1	4.6	1	4	2.5× / 0.4
Exercises · Bering Sea	1	4	1	3	5.0× / 0.2
Exercises · Andaman or Burma Sea	1	3.9	0	—	1.7× / 0.6
Incidents · Celtic Sea	1	3.5	0	—	1.7× / 0.6
Nav aids · Persian Gulf	1	3.5	1	3	1.3× / 0.8
Quakes · Arafura Sea	1	3	0	—	new / 0
Quakes · Ceram Sea	1	3	0	—	new / 0
Quakes · Coral Sea	1	3	0	—	0.5× / 2
Quakes · North Atlantic Ocean	1	3	0	—	2.5× / 0.4
Quakes · Persian Gulf	1	3	0	—	2.5× / 0.4
Incidents · Persian Gulf	1	3	0	—	5.0× / 0.2
Quakes · Sea of Okhotsk	1	3	0	—	1.3× / 0.8
Quakes · South China Sea	1	3	0	—	2.5× / 0.4
Icebergs · South Pacific Ocean	1	3	0	—	0.5× / 2.2
Debris · Timor Sea	1	3	0	—	new / 0
Incidents · Davis Strait	1	2.6	0	—	new / 0
Other · Coral Sea	1	2.4	0	—	2.5× / 0.4
Incidents · Mediterranean Sea - Western Basin	1	2.4	1	2	1.7× / 0.6
Derelicts · Caribbean Sea	1	2.2	0	—	1.3× / 0.8
Wrecks · North Pacific Ocean	1	1.4	1	1	new / 0
Piracy · Red Sea	1	1.2	1	1	new / 0
Incidents · Gulf of Thailand	1	0.7	0	—	new / 0
Other · Inner Seas off the West Coast of Scotland	1	0.7	0	—	2.5× / 0.4
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	0.7	0	—	0.6× / 1.6
Restricted · Strait of Gibraltar	1	0.5	1	0	new / 0
Ordnance · Mediterranean Sea - Western Basin	1	0.4	1	0	new / 0
Nav aids · Great Australian Bight	1	0.3	0	—	0.8× / 1.2
Incidents · Great Australian Bight	1	0.1	0	—	1.7× / 0.6
Other · South Pacific Ocean	1	0	0	—	5.0× / 0.2
Surveys · Arctic Oceanlong running	0	660	22	2,518	— / 0
Surveys · Beaufort Sealong running	0	330	11	2,518	— / 0
Wrecks · The Northwestern Passages	0	120	4	151	0.0× / 0.2
Nav aids · Arabian Sea	0	90	3	349	— / 0
Surveys · Laptev Sealong running	0	90	3	1,652	— / 0
Nav aids · South Pacific Ocean	0	90	3	320	0.0× / 1.2
Surveys · Baffin Bay	0	60	2	151	— / 0
Surveys · Chukchi Sealong running	0	60	2	2,051	— / 0
Ordnance · English Channel	0	60	2	259	— / 0
Cable ops · Makassar Strait	0	60	2	35	— / 0
Nav aids · Malacca Strait	0	60	2	252	— / 0
Wrecks · North Atlantic Oceanlong running	0	60	2	503	— / 0
Nav aids · Irish Sea and St. George's Channellong running	0	56.4	1	407	0.0× / 4.4
Surveys · North Sea	0	42	0	—	0.0× / 0.4
Cable ops · Aegean Sea	0	30	1	34	— / 0
Other · Arctic Ocean	0	30	1	149	— / 0
Surveys · Bering Sea	0	30	1	108	— / 0
Surveys · Greenland Sealong running	0	30	1	2,834	— / 0
Ordnance · Gulf of Aden	0	30	1	63	— / 0
Nav aids · Gulf of Suez	0	30	1	210	0.0× / 0.2
Other · Gulf of Suez	0	30	1	105	— / 0
Cable ops · Halmahera Sea	0	30	1	46	— / 0
Wrecks · Indian Ocean	0	30	1	70	— / 0
Nav aids · Laccadive Sea	0	30	1	54	0.0× / 0.2
Wrecks · Laccadive Sea	0	30	1	105	0.0× / 0.2
Nav aids · Mediterranean Sea - Eastern Basin	0	30	1	42	0.0× / 1
Wrecks · Mediterranean Sea - Eastern Basin	0	30	1	127	0.0× / 0.2
Nav aids · Mozambique Channel	0	30	1	224	0.0× / 0.4
Ordnance · North Sealong running	0	30	1	760	0.0× / 0.4
Piracy · Persian Gulflong running	0	30	1	1,056	0.0× / 0.2
Nav aids · Philippine Sea	0	30	1	116	0.0× / 0.2
Volcanic · Philippine Sea	0	30	1	277	0.0× / 0.4
Surveys · Sea of Okhotsk	0	30	1	40	— / 0
Wrecks · South Atlantic Ocean	0	30	1	202	0.0× / 0.8
Other · South China Sealong running	0	30	1	867	0.0× / 0.4
Other · The Northwestern Passages	0	30	1	122	— / 0
Surveys · The Northwestern Passageslong running	0	30	1	816	— / 0
Ordnance · Persian Gulf	0	29.9	0	—	— / 0
Incidents · Baffin Bay	0	26.4	0	—	— / 0
Nav aids · Bristol Channel	0	26.4	0	—	0.0× / 0.8
Incidents · Caribbean Sea	0	26.4	0	—	0.0× / 0.2
Incidents · Mediterranean Sea - Eastern Basin	0	26.4	0	—	0.0× / 1.8
Spills · North Pacific Ocean	0	15	0	—	0.0× / 1.8
Incidents · Adriatic Sea	0	10.8	0	—	— / 0
Cable ops · Sea of Okhotsk	0	10.4	0	—	— / 0
Other · Andaman or Burma Sea	0	10	0	—	— / 0
Restricted · Gulf of Mexico	0	10	0	—	— / 0
Towing · Sea of Okhotsk	0	8.5	0	—	— / 0
Cable ops · Indian Ocean	0	8	0	—	0.0× / 0.6
Cable ops · Yellow Sea	0	7.6	0	—	— / 0
Other · Celtic Sea	0	7.2	0	—	0.0× / 0.6
Nav aids · Gulf of Alaska	0	6	0	—	0.0× / 1.4
Cable ops · Gulf of Oman	0	5.4	0	—	0.0× / 0.2
Derelicts · North Pacific Ocean	0	5.4	0	—	0.0× / 1.2
Other · Tyrrhenian Sea	0	5.4	0	—	— / 0
Incidents · Tyrrhenian Sea	0	5.4	0	—	— / 0
Derelicts · Bay of Bengal	0	4.5	0	—	0.0× / 0.2
Surveys · Japan Sea	0	3	0	—	0.0× / 0.2
Derelicts · Celtic Sea	0	2.2	0	—	0.0× / 1
Incidents · Timor Sea	0	1.4	0	—	0.0× / 0.2
Derelicts · Red Sea	0	1.1	0	—	— / 0
Missiles · Japan Sea	0	0.4	0	—	— / 0
Cable ops · Barentsz Sea	0	0	0	—	— / 0
Ordnance · Ionian Sea	0	0	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2010-11, 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.