Sea Ledger, August 2012

2012-08-01 to 2012-08-31 · archive

issued: 539
warning-days in force: 8,301
in force at month end: 282
sea × type cells: 215

baseline: same month, previous 5 years (2011-08, 2010-08, 2009-08, 2008-08, 2007-08)

By type

type	issued	warning-days	in force at end
Incidents	134	1,017.8	30
Exercises	72	735.8	27
Cable ops	61	1,378.6	46
Nav aids	55	1,790.5	57
Icebergs	41	63.4	4
Derelicts	38	179.4	11
Quakes	35	93.6	5
Surveys	33	1,212.7	44
Missiles	26	201.4	4
Spills	12	195	9
Other	8	317.9	9
Wrecks	5	527.5	18
Piracy	4	14.2	0
Debris	3	9	0
Ordnance	3	86.5	3
Containers	3	4	1
Restricted	3	266.8	9
Volcanic	2	58.1	1
Towing	1	30	1
Structures	0	31	1
Mines	0	25.4	0
War risk	0	62	2

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · Labrador Seasurge	31	33.9	2	32	155× / 0.2
Cable ops · South Atlantic Ocean	26	168.4	6	34	1.4× / 18.4
Incidents · North Pacific Ocean	25	62.8	2	32	1.9× / 13
Incidents · Indian Oceansurge	22	31.1	1	33	14× / 1.6
Incidents · South China Seasurge	18	163.8	3	35	3.6× / 5
Nav aids · North Seasurge	15	265	9	203	2.8× / 5.4
Incidents · South Pacific Ocean	13	94.1	5	56	1.5× / 8.6
Exercises · South Atlantic Oceansurge	13	63.4	6	34	2.5× / 5.2
Quakes · North Pacific Ocean	11	29.8	1	33	2.0× / 5.6
Surveys · North Atlantic Oceansurge	10	32.1	2	29	6.3× / 1.6
Icebergs · South Atlantic Oceansurge	10	29.5	2	30	7.1× / 1.4
Incidents · North Atlantic Oceansurge	9	222.5	7	69	2.1× / 4.2
Cable ops · North Atlantic Ocean	9	131	7	93	1.1× / 8
Quakes · South Pacific Ocean	9	27	0	—	0.7× / 12.4
Incidents · South Atlantic Ocean	8	25.6	2	31	1.7× / 4.6
Derelicts · North Atlantic Oceansurge	8	17.6	2	31	4.0× / 2
Nav aids · North Atlantic Oceansurgelong running	7	81.9	3	822	2.2× / 3.2
Exercises · Philippine Sea	7	50.7	2	49	1.4× / 5
Exercises · Mediterranean Sea - Eastern Basinnew	7	43.6	1	49	new / 0
Cable ops · North Seasurge	6	178.7	5	53	3.3× / 1.8
Exercises · South China Seasurge	6	126.9	5	37	2.1× / 2.8
Missiles · North Atlantic Oceansurge	6	31.5	0	—	10× / 0.6
Nav aids · Indian Oceansurge	6	4.4	0	—	3.0× / 2
Nav aids · South Atlantic Oceanlong running	5	532.4	18	1,472	0.8× / 6.2
Exercises · Bay of Bengal	5	97.4	1	35	1.1× / 4.6
Cable ops · Norwegian Seasurge	5	89.6	3	87	5.0× / 1
Spills · Gulf of Mexico	5	69	3	45	1.0× / 5
Missiles · North Pacific Ocean	5	52.7	1	61	0.7× / 7.6
Incidents · Caribbean Seasurge	5	50.9	2	28	25× / 0.2
Exercises · North Pacific Ocean	5	44.1	1	36	0.4× / 11.4
Derelicts · Celtic Seasurge	5	20.4	1	15	25× / 0.2
Exercises · Black Seasurge	5	13.7	2	25	25× / 0.2
Surveys · Arctic Oceansurgelong running	4	339.5	14	791	10× / 0.4
Surveys · The Northwestern Passagessurgelong running	4	83	4	384	2.5× / 1.6
Incidents · Mozambique Channelsurge	4	58.4	0	—	3.3× / 1.2
Exercises · Arabian Sea	4	45.6	2	36	1.4× / 2.8
Exercises · Yellow Sea	4	40.7	1	37	0.9× / 4.2
Derelicts · South Pacific Oceansurge	4	38	2	65	10× / 0.4
Missiles · Barentsz Seasurge	4	23.8	1	27	5.0× / 0.8
Exercises · Coral Seasurge	4	7.5	0	—	5.0× / 0.8
Derelicts · Indian Oceansurge	4	7.4	1	9	4.0× / 1
Nav aids · Gulf of Alaskasurge	4	1.3	0	—	2.5× / 1.6
Cable ops · Barentsz Seanew	3	106.1	3	73	new / 0
Nav aids · English Channel	3	104.1	4	174	1.9× / 1.6
Incidents · Adriatic Seasurge	3	33.1	1	49	5.0× / 0.6
Spills · North Atlantic Ocean	3	33	1	30	1.1× / 2.6
Spills · North Pacific Ocean	3	30	3	40	1.5× / 2
Nav aids · Inner Seas off the West Coast of Scotlandsurge	3	19	0	—	2.5× / 1.2
Missiles · White Seanew	3	17.6	0	—	new / 0
Surveys · Mediterranean Sea - Western Basinsurge	3	16.3	0	—	5.0× / 0.6
Exercises · South Pacific Ocean	3	15.5	0	—	0.9× / 3.4
Exercises · North Atlantic Ocean	3	12.3	1	17	0.6× / 5.4
Quakes · Southern Oceansurge	3	9	0	—	2.5× / 1.2
Derelicts · Caribbean Seasurge	3	6.5	0	—	15× / 0.2
Containers · North Atlantic Oceansurge	3	4	1	23	15× / 0.2
Quakes · Philippine Sea	3	3.5	2	13	0.7× / 4.2
Incidents · Tasman Seasurge	3	0.9	0	—	5.0× / 0.6
Incidents · Labrador Seanew	3	0.7	0	—	new / 0
Restricted · North Sealong running	2	127.5	4	375	2.5× / 0.8
Wrecks · South Atlantic Oceannewlong running	2	59.1	3	842	new / 0
Surveys · North Pacific Ocean	2	56.2	2	73	10× / 0.2
Other · The Northwestern Passageslong running	2	42.2	1	762	10× / 0.2
Nav aids · Irish Sea and St. George's Channel	2	41.2	1	106	0.7× / 3
Volcanic · South Pacific Oceannew	2	27.1	0	—	new / 0
Cable ops · Philippine Seanew	2	24.6	1	30	new / 0
Ordnance · Kara Sea	2	21.5	1	21	10× / 0.2
Other · North Atlantic Ocean	2	16.5	2	11	10× / 0.2
Derelicts · South Atlantic Ocean	2	16.4	0	—	10× / 0.2
Other · South Atlantic Oceannew	2	14.1	0	—	new / 0
Missiles · Japan Sea	2	12.5	0	—	10× / 0.2
Incidents · Davis Strait	2	12.4	0	—	5.0× / 0.4
Piracy · Indian Oceannew	2	9.2	0	—	new / 0
Missiles · Bay of Bengal	2	8.6	0	—	10× / 0.2
Nav aids · Tasman Sea	2	7.1	0	—	1.1× / 1.8
Surveys · Kara Seanew	2	6.3	1	11	new / 0
Debris · North Pacific Ocean	2	6	0	—	10× / 0.2
Derelicts · Timor Seanew	2	5.7	1	15	new / 0
Exercises · Bering Sea	2	4.7	0	—	3.3× / 0.6
Quakes · Indian Ocean	2	4.5	1	10	0.8× / 2.4
Nav aids · Coral Sea	2	3.7	0	—	0.8× / 2.6
Derelicts · North Pacific Ocean	2	3.7	0	—	0.8× / 2.4
Incidents · Coral Sea	2	1.7	0	—	0.5× / 4
Incidents · Beaufort Seanew	2	0.5	0	—	new / 0
Cable ops · South China Sea	1	277.3	7	86	0.2× / 4.6
Nav aids · North Pacific Oceanlong running	1	103.4	3	474	0.8× / 1.2
Cable ops · Persian Gulf	1	78.3	2	225	0.6× / 1.8
Incidents · Tyrrhenian Sea	1	70.7	2	229	2.5× / 0.4
Nav aids · Celtic Sea	1	65	1	193	0.5× / 2.2
Nav aids · Gulf of Mexico	1	62	2	297	0.6× / 1.8
Other · Persian Gulf	1	57.6	1	355	1.7× / 0.6
Surveys · Yellow Sea	1	45.5	2	36	5.0× / 0.2
Incidents · Mediterranean Sea - Western Basin	1	41.8	1	38	5.0× / 0.2
Cable ops · Black Sea	1	39.9	2	44	1.0× / 1
Nav aids · South Pacific Ocean	1	36	2	57	0.6× / 1.8
Derelicts · Gulf of Oman	1	34	1	242	new / 0
Wrecks · Arabian Sea	1	32.1	1	84	2.5× / 0.4
Exercises · Laccadive Sea	1	31.9	1	32	0.3× / 4
Incidents · Mediterranean Sea - Eastern Basin	1	30.9	1	39	0.5× / 2.2
Other · Hudson Strait	1	28.7	1	28	new / 0
Cable ops · Beaufort Sea	1	28	1	27	5.0× / 0.2
Incidents · Bay of Biscay	1	24	1	24	2.5× / 0.4
Incidents · Bay of Bengal	1	21.8	0	—	0.6× / 1.8
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	21	1	36	1.7× / 0.6
Wrecks · English Channel	1	18.7	1	18	1.3× / 0.8
Incidents · Laccadive Sea	1	16.6	1	16	5.0× / 0.2
Wrecks · Persian Gulflong running	1	15.9	1	616	new / 0
Surveys · Indian Ocean	1	15.5	1	15	5.0× / 0.2
Cable ops · Labrador Sea	1	15.4	1	15	2.5× / 0.4
Restricted · Black Sea	1	15.3	1	15	5.0× / 0.2
Derelicts · South China Sea	1	14.5	1	14	0.7× / 1.4
Surveys · Aegean Sea	1	14	0	—	2.5× / 0.4
Incidents · Java Sea	1	12.8	1	12	new / 0
Missiles · Laccadive Sea	1	12.5	0	—	5.0× / 0.2
Surveys · Barentsz Sea	1	11.7	1	11	5.0× / 0.2
Cable ops · Eastern China Sea	1	10.5	1	10	5.0× / 0.2
Surveys · Tasman Sea	1	9.8	0	—	5.0× / 0.2
Missiles · South Atlantic Ocean	1	8.8	0	—	5.0× / 0.2
Nav aids · Andaman or Burma Sea	1	8.5	1	8	2.5× / 0.4
Incidents · Japan Sea	1	8.2	0	—	new / 0
Cable ops · Gulf of Mexico	1	8.1	1	8	1.0× / 1
Surveys · Gulf of Mexico	1	8.1	1	8	new / 0
Cable ops · Mediterranean Sea - Eastern Basin	1	7.5	0	—	1.0× / 1
Exercises · Baltic Sea	1	7.2	0	—	0.6× / 1.6
Surveys · South Pacific Ocean	1	5.7	1	5	new / 0
Towing · Bering Sea	1	5.6	1	5	new / 0
Exercises · Andaman or Burma Sea	1	4.9	0	—	1.7× / 0.6
Cable ops · Tasman Sea	1	4.7	0	—	new / 0
Incidents · Eastern China Sea	1	4.3	0	—	new / 0
Incidents · Andaman or Burma Sea	1	3.9	0	—	5.0× / 0.2
Quakes · Banda Sea	1	3	0	—	1.0× / 1
Quakes · Bismarck Sea	1	3	0	—	0.7× / 1.4
Incidents · Gulf of Aden	1	3	0	—	new / 0
Piracy · Gulf of Guinea	1	3	0	—	5.0× / 0.2
Quakes · Gulf of Tomini	1	3	0	—	new / 0
Debris · Indian Ocean	1	3	0	—	5.0× / 0.2
Derelicts · Laptev Sea	1	3	0	—	new / 0
Derelicts · Mediterranean Sea - Eastern Basin	1	3	0	—	2.5× / 0.4
Derelicts · Mediterranean Sea - Western Basin	1	3	0	—	5.0× / 0.2
Quakes · Molukka Sea	1	3	0	—	1.3× / 0.8
Quakes · North Atlantic Ocean	1	3	0	—	0.8× / 1.2
Ordnance · North Pacific Ocean	1	3	0	—	5.0× / 0.2
Quakes · Sea of Okhotsk	1	3	0	—	5.0× / 0.2
Derelicts · Tasman Sea	1	3	0	—	2.5× / 0.4
Derelicts · Labrador Sea	1	2.5	1	2	new / 0
Missiles · Black Sea	1	2.4	1	2	2.5× / 0.4
Surveys · Tyrrhenian Sea	1	2.4	0	—	2.5× / 0.4
Cable ops · Indian Ocean	1	2.2	0	—	1.7× / 0.6
Piracy · Sulu Sea	1	2	0	—	new / 0
Incidents · Solomon Sea	1	1.8	0	—	2.5× / 0.4
Exercises · Indian Ocean	1	1.7	0	—	0.4× / 2.4
Incidents · Gulf of Guinea	1	1.6	0	—	new / 0
Quakes · Greenland Sea	1	1.4	1	1	new / 0
Derelicts · Chukchi Sea	1	0.7	1	0	new / 0
Incidents · Hudson Strait	1	0.4	0	—	new / 0
Nav aids · Great Australian Bight	1	0.3	0	—	0.6× / 1.6
Incidents · Hudson Bay	1	0.1	0	—	new / 0
Missiles · South Pacific Ocean	1	0	0	—	5.0× / 0.2
Nav aids · Arabian Sealong running	0	124	4	756	0.0× / 0.8
Surveys · Beaufort Sealong running	0	124	4	751	0.0× / 0.2
Surveys · South Atlantic Ocean	0	112.9	3	77	0.0× / 2.4
Exercises · Aegean Sea	0	93	3	244	— / 0
Surveys · Sea of Okhotsk	0	77	2	88	0.0× / 1.2
Surveys · Mediterranean Sea - Eastern Basin	0	75	1	90	0.0× / 0.4
Wrecks · South China Sea	0	72.4	2	204	0.0× / 0.2
Cable ops · Gulf of Guinea	0	63.9	2	92	0.0× / 0.8
Surveys · Baffin Baylong running	0	62	2	791	— / 0
Cable ops · Kara Sea	0	62	2	64	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	464	— / 0
Wrecks · North Atlantic Oceanlong running	0	62	2	378	0.0× / 0.2
Other · North Pacific Ocean	0	62	2	137	0.0× / 0.2
Ordnance · North Sealong running	0	62	2	1,400	— / 0
Wrecks · North Sea	0	62	2	333	0.0× / 0.8
Cable ops · Sea of Okhotsk	0	62	2	85	0.0× / 0.6
Nav aids · Sea of Okhotsk	0	62	2	255	0.0× / 0.2
Nav aids · South China Sealong running	0	62	2	382	0.0× / 0.2
Wrecks · The Northwestern Passageslong running	0	62	2	726	0.0× / 0.2
Nav aids · The Northwestern Passages	0	56.3	1	49	— / 0
Other · North Sea	0	34.8	0	—	0.0× / 1.6
Missiles · Aegean Sea	0	31	1	244	— / 0
Surveys · Bering Sea	0	31	1	32	0.0× / 0.2
Nav aids · Bristol Channel	0	31	1	205	0.0× / 0.2
Nav aids · Eastern China Sea	0	31	1	199	— / 0
Surveys · Greenland Sea	0	31	1	224	— / 0
Exercises · Ionian Sea	0	31	1	244	0.0× / 0.2
Wrecks · Irish Sea and St. George's Channel	0	31	1	71	— / 0
Nav aids · Kara Sea	0	31	1	359	— / 0
Other · Kara Sea	0	31	1	51	0.0× / 0.2
Nav aids · Mediterranean Sea - Western Basinlong running	0	31	1	378	0.0× / 0.8
Surveys · Mozambique Channel	0	31	1	130	0.0× / 0.2
Restricted · North Atlantic Ocean	0	31	1	74	0.0× / 0.4
Structures · North Sealong running	0	31	1	382	0.0× / 0.2
Restricted · Persian Gulflong running	0	31	1	638	— / 0
Volcanic · Philippine Sea	0	31	1	124	— / 0
Wrecks · Philippine Sea	0	31	1	109	— / 0
Restricted · Sea of Okhotsk	0	31	1	323	— / 0
Wrecks · Sea of Okhotsk	0	31	1	262	— / 0
Spills · South Atlantic Ocean	0	31	1	294	— / 0
Restricted · South Atlantic Ocean	0	31	1	203	— / 0
Other · South China Sea	0	31	1	92	0.0× / 0.6
Wrecks · Yellow Sea	0	31	1	256	— / 0

Cite: seahazards.com Sea Ledger, 2012-08, 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.