Sea Ledger, July 2012

2012-07-01 to 2012-07-31 · archive

issued: 547
warning-days in force: 8,182
in force at month end: 265
sea × type cells: 215

baseline: same month, previous 5 years (2011-07, 2010-07, 2009-07, 2008-07, 2007-07)

By type

type	issued	warning-days	in force at end
Incidents	126	913.3	28
Cable ops	81	1,146.5	42
Exercises	79	777.4	21
Nav aids	69	1,993.2	68
Icebergs	41	63.8	2
Quakes	30	93.4	2
Derelicts	28	149.2	4
Surveys	22	1,202.7	38
Other	19	340.1	10
Missiles	15	164.9	7
Spills	13	174	8
Wrecks	7	580	18
Containers	7	19.5	0
Debris	3	9	0
Restricted	2	263	8
Structures	2	31.8	1
Towing	2	59.6	2
Ordnance	1	63.3	2
Mines	0	31	1
War risk	0	62	2
Piracy	0	12.8	0
Volcanic	0	31	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	31	184.1	6	33	1.3× / 23.8
Icebergs · Davis Straitnew	22	24.9	0	—	new / 0
Incidents · North Pacific Oceansurge	21	82.3	1	48	2.1× / 10.2
Incidents · South China Seasurge	19	56.2	2	59	11× / 1.8
Incidents · North Atlantic Oceansurge	15	248.4	11	60	2.4× / 6.2
Nav aids · North Sea	12	291.4	10	172	1.9× / 6.4
Cable ops · North Atlantic Oceansurge	12	113.5	2	62	2.2× / 5.4
Exercises · Mediterranean Sea - Eastern Basinsurge	12	45.3	1	33	20× / 0.6
Quakes · South Pacific Ocean	12	38.7	0	—	0.9× / 13
Nav aids · South Atlantic Oceansurgelong running	9	519.5	17	1,441	2.8× / 3.2
Cable ops · South China Seasurge	9	224	10	63	4.5× / 2
Cable ops · Norwegian Seasurge	9	79	1	76	9.0× / 1
Exercises · Black Seasurge	9	46.6	0	—	9.0× / 1
Icebergs · South Atlantic Oceansurge	9	27	0	—	2.6× / 3.4
Derelicts · Indian Oceansurge	9	20.8	0	—	6.4× / 1.4
Incidents · Indian Oceansurge	9	5.4	1	28	3.5× / 2.6
Incidents · South Atlantic Ocean	8	53.7	2	51	1.3× / 6.2
Nav aids · Arafura Seasurge	8	1.8	0	—	40× / 0.2
Exercises · South China Seasurge	7	120.7	4	34	3.2× / 2.2
Cable ops · North Seasurge	7	92.6	5	79	3.9× / 1.8
Exercises · North Pacific Ocean	7	52.1	1	35	0.6× / 12.8
Exercises · South Atlantic Ocean	7	30.8	3	32	1.1× / 6.6
Quakes · North Pacific Ocean	7	20.5	1	23	0.9× / 8
Surveys · South Atlantic Oceansurge	6	110	4	76	2.0× / 3
Incidents · South Pacific Ocean	6	97.5	1	56	0.8× / 7.4
Spills · Gulf of Mexico	6	65	3	27	1.1× / 5.4
Exercises · Bay of Bengal	6	63	2	35	1.3× / 4.6
Incidents · Mediterranean Sea - Eastern Basinnew	6	28	2	26	new / 0
Containers · North Atlantic Oceansurge	6	16	0	—	30× / 0.2
Incidents · Coral Seasurge	6	9.4	0	—	2.7× / 2.2
Nav aids · North Pacific Oceansurgelong running	5	125.2	5	443	3.1× / 1.6
Nav aids · Celtic Seasurge	5	120.4	5	162	4.2× / 1.2
Nav aids · North Atlantic Oceanlong running	5	117.1	3	791	1.3× / 4
Exercises · Philippine Seasurge	5	83	2	34	2.5× / 2
Exercises · Yellow Sea	5	38.6	2	32	0.9× / 5.4
Icebergs · Hudson Straitnew	5	5.4	0	—	new / 0
Surveys · Mediterranean Sea - Eastern Basinsurge	4	60	4	59	3.3× / 1.2
Nav aids · South Pacific Oceansurge	4	51.4	1	31	2.0× / 2
Incidents · Bay of Bengalsurge	4	50.3	2	29	3.3× / 1.2
Missiles · North Pacific Ocean	4	43	3	60	0.6× / 6.8
Exercises · Coral Seasurge	4	9.4	0	—	20× / 0.2
Other · Hudson Baynew	4	6.8	0	—	new / 0
Icebergs · Labrador Seanew	4	3.5	2	3	new / 0
Nav aids · English Channelsurge	3	103.3	3	143	2.5× / 1.2
Nav aids · Irish Sea and St. George's Channel	3	97.4	3	75	1.4× / 2.2
Other · North Pacific Oceansurge	3	74.4	2	106	3.0× / 1
Other · Persian Gulfnew	3	61.7	2	324	new / 0
Cable ops · Gulf of Guineasurge	3	55.5	3	61	15× / 0.2
Incidents · Adriatic Seanew	3	49.6	2	25	new / 0
Nav aids · The Northwestern Passagesnew	3	42.7	3	18	new / 0
Nav aids · Coral Sea	3	34.3	1	39	1.5× / 2
Missiles · North Atlantic Ocean	3	31.6	3	32	1.4× / 2.2
Derelicts · South Atlantic Oceansurge	3	30.3	1	34	5.0× / 0.6
Exercises · Bering Seasurge	3	9.5	0	—	7.5× / 0.4
Derelicts · South China Seasurge	3	9	0	—	2.1× / 1.4
Derelicts · North Pacific Ocean	3	4.7	0	—	1.1× / 2.6
Incidents · Davis Straitsurge	3	2.4	0	—	15× / 0.2
Restricted · North Sea	2	139	4	344	5.0× / 0.4
Cable ops · Barentsz Seanew	2	101.8	4	42	new / 0
Wrecks · South China Sealong running	2	98.7	3	624	10× / 0.2
Cable ops · Persian Gulf	2	72.5	3	194	3.3× / 0.6
Incidents · Tyrrhenian Sea	2	46.5	2	198	1.7× / 1.2
Spills · North Pacific Ocean	2	35	1	33	1.3× / 1.6
Wrecks · Laccadive Sea	2	29.7	1	29	5.0× / 0.4
Surveys · North Atlantic Ocean	2	29.4	0	—	0.7× / 2.8
Exercises · Laccadive Sea	2	28.8	1	27	0.5× / 4
Surveys · Gulf of Mexiconew	2	26.3	0	—	new / 0
Incidents · Caribbean Sea	2	23	0	—	2.0× / 1
Exercises · South Pacific Ocean	2	21.9	0	—	0.5× / 4.2
Surveys · Black Sea	2	20.8	0	—	3.3× / 0.6
Incidents · Mediterranean Sea - Western Basin	2	8.2	1	8	5.0× / 0.4
Incidents · Hudson Baynew	2	8.1	0	—	new / 0
Spills · The Coastal Waters of Southeast Alaska and British Columbia	2	8	2	5	5.0× / 0.4
Missiles · Arctic Ocean	2	7	0	—	3.3× / 0.6
Derelicts · Arabian Seanew	2	6	0	—	new / 0
Quakes · Coral Sea	2	6	0	—	1.4× / 1.4
Quakes · Indian Ocean	2	6	0	—	2.0× / 1
Missiles · South Pacific Ocean	2	5.1	0	—	5.0× / 0.4
Derelicts · North Atlantic Ocean	2	4.1	1	31	1.3× / 1.6
Exercises · Mediterranean Sea - Western Basinnew	2	3.8	0	—	new / 0
Nav aids · Indian Ocean	2	2.9	1	13	3.3× / 0.6
Incidents · Philippine Sea	2	2.6	0	—	0.7× / 3
Derelicts · Bay of Bengalnew	2	2.4	0	—	new / 0
Incidents · Tasman Sea	2	2.3	0	—	2.0× / 1
Nav aids · Tasman Sea	2	2.1	0	—	5.0× / 0.4
Other · Coral Seanew	2	1.6	0	—	new / 0
Structures · South Atlantic Oceannew	2	0.8	0	—	new / 0
Incidents · Arafura Sea	2	0.4	0	—	10× / 0.2
Nav aids · Arabian Sealong running	1	99.5	4	725	new / 0
Wrecks · North Atlantic Ocean	1	79.1	2	347	5.0× / 0.2
Other · North Sea	1	69.4	2	95	2.5× / 0.4
Ordnance · North Sealong running	1	63.3	2	1,369	5.0× / 0.2
Nav aids · Gulf of Mexico	1	62.2	2	266	0.3× / 3.2
Cable ops · Kara Sea	1	57.2	2	33	new / 0
Wrecks · North Sea	1	49.8	2	302	5.0× / 0.2
Incidents · Mozambique Channel	1	46.7	0	—	2.5× / 0.4
Exercises · Arabian Sea	1	42	1	34	0.3× / 3
Other · The Northwestern Passageslong running	1	35.3	2	731	2.5× / 0.4
Derelicts · South Pacific Ocean	1	34	1	34	1.3× / 0.8
Surveys · Bering Sealong running	1	31	1	717	5.0× / 0.2
Nav aids · Inner Seas off the West Coast of Scotland	1	31	1	54	0.3× / 3.8
Towing · South Atlantic Ocean	1	31	1	36	new / 0
Towing · Sea of Okhotsk	1	28.6	1	39	new / 0
Cable ops · Laccadive Sea	1	27.5	1	32	new / 0
Surveys · English Channel	1	27.4	1	44	2.5× / 0.4
Surveys · Mediterranean Sea - Western Basin	1	21.4	1	40	1.3× / 0.8
Other · Kara Sea	1	20.5	1	20	new / 0
Surveys · South China Sea	1	19.8	0	—	5.0× / 0.2
Incidents · Hudson Strait	1	17.3	0	—	new / 0
Cable ops · Mediterranean Sea - Eastern Basin	1	17.3	0	—	0.3× / 3
Incidents · Sea of Okhotsk	1	15.9	0	—	5.0× / 0.2
Missiles · South Atlantic Ocean	1	15.8	0	—	0.8× / 1.2
Incidents · Singapore Strait	1	15.6	1	15	new / 0
Nav aids · Mozambique Channel	1	15.2	1	15	new / 0
Missiles · Black Sea	1	15.1	0	—	2.5× / 0.4
Other · Mozambique Channel	1	14.8	0	—	new / 0
Cable ops · Banda Sea	1	14.6	1	14	new / 0
Spills · Bering Sea	1	14	0	—	2.5× / 0.4
Spills · North Atlantic Ocean	1	14	0	—	0.5× / 2.2
Exercises · Eastern China Sea	1	13.9	0	—	5.0× / 0.2
Cable ops · Black Sea	1	13.3	1	13	1.7× / 0.6
Surveys · Kara Sea	1	11.7	0	—	new / 0
Exercises · Sea of Okhotsk	1	10.3	0	—	new / 0
Cable ops · English Channel	1	10.2	1	10	5.0× / 0.2
Incidents · Gulf of Mexico	1	6.5	0	—	1.7× / 0.6
Surveys · Yellow Sea	1	5.5	1	5	new / 0
Exercises · Andaman or Burma Sea	1	5	0	—	1.7× / 0.6
Incidents · Bismarck Sea	1	4.9	0	—	0.8× / 1.2
Missiles · Laccadive Sea	1	4.5	0	—	2.5× / 0.4
Exercises · Baltic Sea	1	4.4	0	—	0.6× / 1.8
Missiles · Barentsz Sea	1	4.4	0	—	2.5× / 0.4
Exercises · Barentsz Sea	1	3.9	0	—	5.0× / 0.2
Wrecks · English Channel	1	3.6	0	—	1.0× / 1
Containers · North Pacific Ocean	1	3.5	0	—	0.7× / 1.4
Other · Arabian Sea	1	3	0	—	new / 0
Quakes · Bismarck Sea	1	3	0	—	0.7× / 1.4
Quakes · Ceram Sea	1	3	0	—	new / 0
Derelicts · Coral Sea	1	3	0	—	0.6× / 1.6
Quakes · Eastern China Sea	1	3	0	—	2.5× / 0.4
Debris · Indian Ocean	1	3	0	—	1.3× / 0.8
Quakes · Mediterranean Sea - Eastern Basin	1	3	0	—	2.5× / 0.4
Exercises · North Atlantic Ocean	1	3	0	—	0.3× / 3.8
Debris · North Pacific Ocean	1	3	0	—	5.0× / 0.2
Derelicts · Philippine Sea	1	3	0	—	1.3× / 0.8
Spills · Philippine Sea	1	3	1	3	2.5× / 0.4
Quakes · Solomon Sea	1	3	0	—	0.6× / 1.8
Icebergs · Southern Ocean	1	3	0	—	1.3× / 0.8
Debris · Tasman Sea	1	3	0	—	new / 0
Quakes · Tasman Sea	1	3	0	—	1.7× / 0.6
Quakes · Japan Sea	1	2.6	1	2	1.7× / 0.6
Incidents · Solomon Sea	1	2.5	0	—	1.7× / 0.6
Incidents · Bass Strait	1	1.9	0	—	new / 0
Derelicts · North Sea	1	0.9	0	—	new / 0
Other · South Atlantic Ocean	1	0.8	0	—	0.8× / 1.2
Other · Indian Ocean	1	0.4	0	—	5.0× / 0.2
Nav aids · Timor Sea	1	0.4	0	—	1.7× / 0.6
Exercises · Persian Gulf	1	0.2	0	—	5.0× / 0.2
Incidents · Java Sea	1	0.1	0	—	new / 0
Incidents · The Northwestern Passages	1	0.1	0	—	new / 0
Incidents · Timor Sea	1	0.1	0	—	5.0× / 0.2
Incidents · Celtic Sea	1	0	0	—	2.5× / 0.4
Surveys · Arctic Oceanlong running	0	310	10	760	0.0× / 1.6
Surveys · Beaufort Sealong running	0	124	4	720	0.0× / 3.2
Surveys · Sea of Okhotsk	0	118	3	57	0.0× / 1.8
Exercises · Aegean Sea	0	93	3	213	0.0× / 0.2
Wrecks · The Northwestern Passageslong running	0	62.7	2	695	0.0× / 0.6
Surveys · Baffin Baylong running	0	62	2	760	0.0× / 1.2
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	433	— / 0
Cable ops · Sea of Okhotsk	0	62	2	54	0.0× / 1.6
Nav aids · Sea of Okhotsk	0	62	2	224	0.0× / 0.2
Nav aids · South China Sea	0	62	2	351	— / 0
Surveys · The Northwestern Passages	0	62	2	353	0.0× / 0.6
Nav aids · Mediterranean Sea - Western Basin	0	58.4	1	347	0.0× / 0.6
Missiles · Aegean Sea	0	31	1	213	— / 0
Wrecks · Arabian Sea	0	31	1	53	0.0× / 0.2
Nav aids · Bristol Channel	0	31	1	174	0.0× / 0.6
Surveys · Chukchi Sea	0	31	1	235	0.0× / 0.2
Nav aids · Eastern China Sea	0	31	1	168	0.0× / 0.2
Surveys · Greenland Sea	0	31	1	193	— / 0
Derelicts · Gulf of Oman	0	31	1	211	— / 0
Wrecks · Indian Ocean	0	31	1	53	0.0× / 0.2
Exercises · Ionian Sea	0	31	1	213	— / 0
Wrecks · Irish Sea and St. George's Channel	0	31	1	40	— / 0
Nav aids · Kara Sea	0	31	1	328	— / 0
Mines · Kara Sea	0	31	1	214	— / 0
Surveys · Mozambique Channel	0	31	1	99	0.0× / 0.2
Restricted · North Atlantic Ocean	0	31	1	43	0.0× / 0.4
Surveys · North Pacific Ocean	0	31	1	42	0.0× / 0.6
Structures · North Sea	0	31	1	351	0.0× / 0.2
Restricted · Persian Gulflong running	0	31	1	607	— / 0
Surveys · Persian Gulflong running	0	31	1	447	— / 0
Wrecks · Persian Gulflong running	0	31	1	585	0.0× / 0.4
Volcanic · Philippine Sea	0	31	1	93	0.0× / 0.2
Wrecks · Philippine Sea	0	31	1	78	— / 0
Restricted · Sea of Okhotsk	0	31	1	292	0.0× / 0.2
Wrecks · Sea of Okhotsk	0	31	1	231	— / 0
Spills · South Atlantic Ocean	0	31	1	263	— / 0
Restricted · South Atlantic Ocean	0	31	1	172	— / 0
Wrecks · South Atlantic Oceanlong running	0	31	1	811	— / 0
Other · South China Sea	0	31	1	61	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2012-07, 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.