Sea Ledger, October 2012

2012-10-01 to 2012-10-31 · archive

issued: 529
warning-days in force: 8,374
in force at month end: 280
sea × type cells: 217

baseline: same month, previous 5 years (2011-10, 2010-10, 2009-10, 2008-10, 2007-10)

By type

type	issued	warning-days	in force at end
Incidents	130	841	39
Exercises	105	1,049	29
Nav aids	64	1,954.5	63
Cable ops	50	1,175.2	38
Quakes	38	104.6	3
Missiles	36	237.2	6
Icebergs	35	46.2	2
Other	21	444.7	16
Derelicts	17	106.6	3
Surveys	17	1,254.1	44
Piracy	5	30.6	0
Wrecks	4	573.8	17
Containers	3	6.4	2
Spills	1	50	2
Restricted	1	279	9
Debris	1	3	0
Ordnance	1	62.5	3
Structures	0	31	1
Towing	0	31.4	0
War risk	0	62	2
Volcanic	0	31	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · Labrador Seanew	31	34.2	2	32	new / 0
Incidents · North Pacific Ocean	22	136.2	3	65	1.4× / 15.4
Incidents · North Atlantic Oceansurge	18	106.6	11	31	2.6× / 7
Cable ops · South Atlantic Ocean	17	135.4	5	51	0.9× / 18.2
Incidents · South China Seasurge	15	127.9	5	50	3.4× / 4.4
Incidents · Indian Oceansurge	15	25.3	1	34	5.8× / 2.6
Exercises · North Pacific Ocean	14	63.7	2	35	1.2× / 11.6
Quakes · North Pacific Oceansurge	14	42.2	1	32	2.7× / 5.2
Exercises · Mediterranean Sea - Eastern Basinsurge	13	34.5	1	33	65× / 0.2
Nav aids · North Sea	12	271.8	9	264	1.1× / 11
Cable ops · North Atlantic Oceansurge	12	212.3	7	91	2.5× / 4.8
Exercises · South Atlantic Ocean	12	133.7	1	62	1.1× / 10.8
Missiles · North Pacific Ocean	12	69.5	3	60	1.9× / 6.2
Incidents · South Pacific Ocean	12	31.4	2	30	1.3× / 9
Exercises · Arabian Seasurge	10	70	1	32	2.1× / 4.8
Nav aids · South Atlantic Oceanlong running	9	527.1	17	1,533	1.6× / 5.8
Exercises · Philippine Seasurge	9	143.2	6	40	2.5× / 3.6
Incidents · South Atlantic Ocean	9	78.4	2	37	1.9× / 4.8
Exercises · Bay of Bengal	8	83.8	3	37	0.9× / 8.4
Exercises · Yellow Sea	8	60.6	1	34	1.3× / 6.2
Nav aids · North Atlantic Ocean	8	46.3	1	34	1.4× / 5.6
Exercises · South China Sea	7	150.2	6	35	1.4× / 5.2
Incidents · Mediterranean Sea - Eastern Basinsurge	7	79.3	3	54	5.8× / 1.2
Exercises · Coral Seasurge	7	18.4	0	—	18× / 0.4
Exercises · Aegean Seasurge	6	138.6	6	305	15× / 0.4
Nav aids · English Channelsurge	5	113.3	4	235	2.1× / 2.4
Other · Black Seasurge	5	31	1	33	25× / 0.2
Missiles · North Atlantic Oceansurge	5	26.7	0	—	6.3× / 0.8
Cable ops · North Seasurge	4	91.6	0	—	2.5× / 1.6
Other · North Atlantic Oceansurge	4	77.1	3	72	3.3× / 1.2
Incidents · Gulf of Mexicosurge	4	66.2	3	47	4.0× / 1
Incidents · Caribbean Seasurge	4	35.6	2	57	3.3× / 1.2
Exercises · Black Seasurge	4	22.7	0	—	6.7× / 0.6
Derelicts · Indian Oceansurge	4	12	0	—	3.3× / 1.2
Icebergs · South Atlantic Ocean	4	12	0	—	0.8× / 5
Missiles · South Pacific Oceansurge	4	8.5	0	—	6.7× / 0.6
Nav aids · Inner Seas off the West Coast of Scotland	4	5.4	0	—	1.4× / 2.8
Surveys · Arctic Oceansurgelong running	3	384.2	14	852	5.0× / 0.6
Surveys · Beaufort Seasurgelong running	3	161.9	6	812	5.0× / 0.6
Surveys · South Atlantic Ocean	3	146.2	5	109	0.6× / 4.8
Nav aids · Celtic Sea	3	60.3	2	106	1.7× / 1.8
Nav aids · Aegean Seanew	3	38.6	0	—	new / 0
Exercises · North Atlantic Ocean	3	36.7	1	62	0.6× / 4.8
Nav aids · Coral Sea	3	34	1	47	1.7× / 1.8
Missiles · Barentsz Seasurge	3	14	1	19	2.5× / 1.2
Quakes · Indian Ocean	3	9	0	—	0.8× / 3.8
Quakes · South Pacific Ocean	3	9	0	—	0.2× / 13.2
Derelicts · North Atlantic Ocean	3	7.3	1	18	1.5× / 2
Incidents · Coral Sea	3	2.7	1	30	0.7× / 4.6
Incidents · Tasman Sea	3	0.8	0	—	1.4× / 2.2
Quakes · The Coastal Waters of Southeast Alaska and British Columbianew	3	0.3	0	—	new / 0
Nav aids · South Pacific Ocean	2	81.9	3	118	2.0× / 1
Nav aids · North Pacific Oceanlong running	2	66.7	3	535	0.8× / 2.6
Nav aids · Gulf of Mexico	2	64.6	2	358	0.4× / 4.6
Wrecks · North Atlantic Oceanlong running	2	64.2	2	439	5.0× / 0.4
Cable ops · Gulf of Mexico	2	35.8	2	28	2.0× / 1
Nav aids · Laccadive Sea	2	22.5	1	28	5.0× / 0.4
Surveys · Black Sea	2	20	1	33	5.0× / 0.4
Exercises · South Pacific Ocean	2	19.3	0	—	0.6× / 3.4
Incidents · Ionian Sea	2	19.1	1	23	5.0× / 0.4
Piracy · South China Sea	2	18.6	0	—	1.3× / 1.6
Missiles · South Atlantic Ocean	2	16.1	1	28	5.0× / 0.4
Missiles · Norwegian Seanew	2	15	0	—	new / 0
Missiles · Kara Sea	2	12.7	0	—	2.5× / 0.8
Piracy · Indian Ocean	2	11.4	0	—	0.3× / 8
Cable ops · Bay of Bengal	2	10.3	2	9	5.0× / 0.4
Missiles · Japan Sea	2	10	0	—	5.0× / 0.4
Cable ops · Celtic Sea	2	9.2	1	6	1.1× / 1.8
Quakes · Gulf of California	2	6	0	—	2.5× / 0.8
Derelicts · North Pacific Ocean	2	6	0	—	0.9× / 2.2
Quakes · Southern Oceannew	2	6	0	—	new / 0
Quakes · Banda Sea	2	5.7	1	23	1.4× / 1.4
Other · Gulf of Mexico	2	5.2	1	9	3.3× / 0.6
Incidents · Baffin Bay	2	4.4	1	13	10× / 0.2
Derelicts · Celtic Sea	2	3.9	0	—	3.3× / 0.6
Nav aids · Indian Ocean	2	3.8	0	—	2.5× / 0.8
Other · Davis Straitnew	2	3.2	0	—	new / 0
Incidents · Bay of Bengal	2	1.5	1	1	2.0× / 1
Cable ops · South China Sea	1	205.8	6	147	0.3× / 3.4
Restricted · North Sealong running	1	93	3	436	5.0× / 0.2
Wrecks · North Sealong running	1	84	2	394	5.0× / 0.2
Cable ops · Black Sea	1	77.4	3	45	0.8× / 1.2
Cable ops · Persian Gulf	1	69.6	3	286	2.5× / 0.4
Other · North Pacific Ocean	1	66.1	2	198	1.7× / 0.6
Nav aids · Irish Sea and St. George's Channel	1	62.4	2	42	0.4× / 2.4
Cable ops · Gulf of Guinea	1	45.8	1	153	0.4× / 2.4
Cable ops · Eastern China Sea	1	45.5	2	71	2.5× / 0.4
Nav aids · The Northwestern Passages	1	44.1	1	97	new / 0
Cable ops · Mediterranean Sea - Eastern Basin	1	38	1	37	0.5× / 2.2
Incidents · Tyrrhenian Sea	1	37.6	1	290	1.3× / 0.8
Cable ops · Indian Ocean	1	30.4	1	30	1.0× / 1
Other · Southern Ocean	1	29.8	1	29	new / 0
Cable ops · Banda Sea	1	27.8	1	27	5.0× / 0.2
Nav aids · Gulf of California	1	25.9	1	25	2.5× / 0.4
Surveys · Indian Ocean	1	22.6	1	22	1.0× / 1
Surveys · Mediterranean Sea - Western Basin	1	20.4	1	20	5.0× / 0.2
Cable ops · Beaufort Sea	1	20	1	88	new / 0
Other · Barentsz Sea	1	19.8	1	19	new / 0
Incidents · Mozambique Channel	1	19	0	—	1.0× / 1
Other · Andaman or Burma Sea	1	15.3	1	15	2.5× / 0.4
Cable ops · Laptev Sea	1	15	0	—	new / 0
Nav aids · Laptev Sea	1	14.5	0	—	new / 0
Other · Mediterranean Sea - Eastern Basin	1	14.3	0	—	2.5× / 0.4
Incidents · Philippine Sea	1	13	1	31	0.2× / 5
Incidents · Celtic Sea	1	12.4	0	—	1.0× / 1
Missiles · Sea of Okhotsk	1	11.5	0	—	2.5× / 0.4
Other · Indian Ocean	1	10.8	1	10	1.7× / 0.6
Incidents · Aegean Sea	1	10.6	0	—	new / 0
Missiles · Philippine Sea	1	10.1	0	—	new / 0
Cable ops · Sulu Sea	1	8.5	0	—	new / 0
Surveys · Bay of Bengal	1	7.8	1	7	1.7× / 0.6
Exercises · Baltic Sea	1	7.7	0	—	0.5× / 2.2
Surveys · North Sea	1	7.6	1	7	1.7× / 0.6
Missiles · Laccadive Sea	1	7.1	0	—	1.7× / 0.6
Incidents · Andaman or Burma Sea	1	5.5	1	5	5.0× / 0.2
Nav aids · Persian Gulf	1	5.5	1	5	2.5× / 0.4
Exercises · Andaman or Burma Sea	1	5.3	0	—	1.0× / 1
Surveys · Aegean Sea	1	5.1	0	—	2.5× / 0.4
Missiles · Black Sea	1	5	0	—	new / 0
Wrecks · Coral Sea	1	3.2	0	—	5.0× / 0.2
Derelicts · Arafura Sea	1	3	0	—	new / 0
Quakes · Arafura Sea	1	3	0	—	2.5× / 0.4
Derelicts · Caribbean Sea	1	3	0	—	2.5× / 0.4
Quakes · Celebes Sea	1	3	0	—	1.7× / 0.6
Derelicts · Coral Sea	1	3	0	—	2.5× / 0.4
Quakes · Coral Sea	1	3	0	—	0.2× / 6.2
Quakes · Greenland Sea	1	3	0	—	new / 0
Incidents · Laccadive Sea	1	3	0	—	5.0× / 0.2
Quakes · North Atlantic Ocean	1	3	0	—	1.0× / 1
Containers · North Pacific Ocean	1	3	0	—	1.7× / 0.6
Debris · North Sea	1	3	0	—	new / 0
Quakes · Philippine Sea	1	3	0	—	0.6× / 1.8
Quakes · Solomon Sea	1	3	0	—	0.6× / 1.8
Derelicts · South Atlantic Ocean	1	3	0	—	1.0× / 1
Containers · South China Sea	1	3	1	2	new / 0
Quakes · South China Sea	1	3	0	—	new / 0
Derelicts · Tasman Sea	1	3	0	—	5.0× / 0.2
Other · Timor Sea	1	3	0	—	new / 0
Incidents · Timor Sea	1	3	0	—	0.8× / 1.2
Incidents · Gulf of Guinea	1	2.4	0	—	new / 0
Surveys · Irish Sea and St. George's Channel	1	2.4	0	—	new / 0
Quakes · Molukka Sea	1	2.4	1	2	1.7× / 0.6
Incidents · Bismarck Sea	1	2.1	0	—	2.5× / 0.4
Other · South Atlantic Ocean	1	1.7	0	—	0.7× / 1.4
Spills · North Atlantic Ocean	1	1	1	1	0.5× / 2
Nav aids · Tasman Sea	1	0.8	0	—	5.0× / 0.2
Piracy · Gulf of Guinea	1	0.6	0	—	new / 0
Ordnance · Laccadive Sea	1	0.5	1	0	new / 0
Containers · Celtic Sea	1	0.4	1	0	new / 0
Incidents · Hudson Bay	1	0.4	0	—	5.0× / 0.2
Derelicts · North Sea	1	0.4	0	—	new / 0
Incidents · Solomon Sea	1	0.4	0	—	5.0× / 0.2
Nav aids · Bass Strait	1	0	0	—	1.7× / 0.6
Nav aids · Arabian Sealong running	0	217	7	817	0.0× / 0.8
Wrecks · South Atlantic Oceanlong running	0	93	3	903	0.0× / 0.4
Surveys · Baffin Baylong running	0	62	2	852	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	525	— / 0
Ordnance · North Sealong running	0	62	2	1,461	0.0× / 1
Other · Persian Gulflong running	0	62	2	416	— / 0
Nav aids · Sea of Okhotsk	0	62	2	316	0.0× / 0.2
Surveys · Sea of Okhotsk	0	62	2	149	0.0× / 0.4
Nav aids · South China Sealong running	0	62	2	443	0.0× / 0.2
Wrecks · South China Sea	0	62	2	265	0.0× / 0.6
Surveys · The Northwestern Passages	0	62	2	86	— / 0
Wrecks · The Northwestern Passageslong running	0	62	2	787	— / 0
Surveys · Yellow Sea	0	62	2	97	— / 0
Surveys · Mediterranean Sea - Eastern Basin	0	46	1	151	0.0× / 1.4
Missiles · Aegean Sea	0	31	1	305	— / 0
Wrecks · Arabian Sea	0	31	1	59	— / 0
Surveys · Barentsz Sea	0	31	1	72	— / 0
Restricted · Bay of Bengal	0	31	1	60	— / 0
Surveys · Bering Sea	0	31	1	93	0.0× / 0.2
Restricted · Black Sea	0	31	1	76	— / 0
Nav aids · Bristol Channel	0	31	1	266	0.0× / 0.4
Nav aids · Eastern China Sea	0	31	1	260	— / 0
Wrecks · English Channel	0	31	1	79	— / 0
Derelicts · Gulf of Oman	0	31	1	303	— / 0
Cable ops · Gulf of Thailand	0	31	1	50	0.0× / 0.6
Exercises · Ionian Sea	0	31	1	305	— / 0
Wrecks · Irish Sea and St. George's Channel	0	31	1	132	— / 0
Nav aids · Kara Sealong running	0	31	1	420	— / 0
Other · Kara Sea	0	31	1	112	— / 0
Nav aids · Mediterranean Sea - Western Basinlong running	0	31	1	439	0.0× / 1
Restricted · North Atlantic Ocean	0	31	1	135	0.0× / 1.4
Surveys · North Atlantic Ocean	0	31	1	50	0.0× / 1
Surveys · North Pacific Ocean	0	31	1	89	0.0× / 0.2
Other · North Sea	0	31	1	49	0.0× / 2
Structures · North Sealong running	0	31	1	443	— / 0
Restricted · Persian Gulflong running	0	31	1	699	— / 0
Wrecks · Persian Gulf	0	31	1	57	— / 0
Volcanic · Philippine Sea	0	31	1	185	0.0× / 0.2
Wrecks · Philippine Sea	0	31	1	170	— / 0
Surveys · Sea of Marmara	0	31	1	48	— / 0
Cable ops · Sea of Okhotsk	0	31	1	126	0.0× / 0.4
Restricted · Sea of Okhotsklong running	0	31	1	384	0.0× / 0.4
Spills · South Atlantic Ocean	0	31	1	355	— / 0
Restricted · South Atlantic Ocean	0	31	1	264	— / 0
Derelicts · South Pacific Ocean	0	31	1	126	0.0× / 0.8
Other · The Northwestern Passageslong running	0	31	1	823	— / 0
Wrecks · Yellow Sea	0	31	1	317	— / 0

Cite: seahazards.com Sea Ledger, 2012-10, 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.