Sea Ledger, May 2012

2012-05-01 to 2012-05-31 · archive

issued: 464
warning-days in force: 7,004
in force at month end: 234
sea × type cells: 195

baseline: same month, previous 5 years (2011-05, 2010-05, 2009-05, 2008-05, 2007-05)

By type

type	issued	warning-days	in force at end
Incidents	99	826.7	34
Exercises	86	776.4	25
Cable ops	65	753.1	31
Nav aids	49	1,539.7	51
Icebergs	34	45.8	2
Derelicts	30	97.2	2
Quakes	24	81.9	3
Missiles	20	175.9	3
Spills	17	245	7
Piracy	15	40.6	0
Other	6	205.8	8
Surveys	5	1,007.6	30
Wrecks	4	620.9	21
Debris	3	40	1
Containers	3	8.2	1
Restricted	3	231.9	7
Ordnance	1	113.7	2
Structures	0	31	1
Mines	0	31	1
Volcanic	0	62	2
War risk	0	62	2
Towing	0	7.7	0

By sea and type · 195 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	35	239.8	9	126	1.3× / 26.6
Icebergs · Labrador Seanew	30	36.7	2	32	new / 0
Incidents · North Pacific Ocean	19	97.3	7	72	1.9× / 10
Incidents · North Atlantic Ocean	18	252	10	57	2.0× / 9.2
Exercises · North Pacific Ocean	12	60.4	2	35	1.2× / 9.8
Nav aids · North Seasurge	11	365.1	11	196	2.4× / 4.6
Incidents · South Pacific Ocean	11	54.2	4	37	1.5× / 7.2
Derelicts · North Atlantic Oceansurge	11	30.4	0	—	6.1× / 1.8
Exercises · South Pacific Oceansurge	10	27.1	2	31	3.1× / 3.2
Exercises · North Atlantic Ocean	9	48.7	1	32	1.1× / 8
Quakes · South Pacific Ocean	9	26.6	2	33	0.9× / 10.4
Incidents · Indian Oceansurge	9	15.8	1	26	2.5× / 3.6
Exercises · Bay of Bengal	8	88.9	3	35	1.4× / 5.6
Exercises · South Atlantic Ocean	8	70.2	2	28	0.9× / 8.4
Exercises · Arabian Seasurge	8	62.7	2	34	2.0× / 4
Nav aids · Coral Seasurge	8	10.6	2	28	2.7× / 3
Spills · Gulf of Mexico	7	82	4	44	1.3× / 5.4
Incidents · South China Seasurge	7	42.1	0	—	2.7× / 2.6
Missiles · North Atlantic Oceansurge	7	36.4	0	—	2.2× / 3.2
Exercises · Mediterranean Sea - Eastern Basinsurge	7	28.5	1	31	7.0× / 1
Cable ops · North Atlantic Ocean	7	25.8	3	33	1.3× / 5.6
Incidents · Coral Sea	7	6.9	0	—	1.8× / 4
Nav aids · North Atlantic Oceanlong running	6	120.3	5	730	1.8× / 3.4
Incidents · South Atlantic Ocean	6	53.2	1	55	1.2× / 5
Quakes · North Pacific Ocean	6	21.1	0	—	1.0× / 5.8
Piracy · Arabian Sea	6	18.9	0	—	1.1× / 5.2
Derelicts · Indian Oceansurge	6	15.6	0	—	10× / 0.6
Exercises · South China Seasurge	5	94.3	4	35	3.1× / 1.6
Cable ops · South China Seasurge	5	63.3	5	62	2.1× / 2.4
Spills · North Pacific Oceansurge	5	62	2	38	2.8× / 1.8
Exercises · Philippine Sea	5	57.2	2	42	1.0× / 5
Exercises · Yellow Sea	5	41	1	37	1.1× / 4.4
Incidents · Gulf of Mexicosurge	4	83.4	3	69	2.5× / 1.6
Nav aids · Gulf of Mexico	4	63.4	2	205	1.0× / 4
Missiles · North Pacific Ocean	4	56.2	1	31	0.6× / 6.4
Nav aids · Indian Oceansurge	4	20.5	0	—	20× / 0.2
Piracy · Gulf of Guineanew	4	3.2	0	—	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbiasurge	4	0.9	0	—	4.0× / 1
Spills · The Coastal Waters of Southeast Alaska and British Columbianew	3	42	0	—	new / 0
Incidents · Philippine Sea	3	24.8	1	25	1.1× / 2.6
Incidents · Caribbean Sea	3	19.5	0	—	1.7× / 1.8
Quakes · Indian Ocean	3	12.7	0	—	0.9× / 3.2
Derelicts · South Pacific Ocean	3	5.3	0	—	1.5× / 2
Piracy · Gulf of Omannew	3	3.8	0	—	new / 0
Nav aids · English Channel	2	95.8	3	82	0.8× / 2.4
Nav aids · North Pacific Oceanlong running	2	92.7	3	382	0.8× / 2.4
Cable ops · Norwegian Sea	2	67.8	3	40	1.7× / 1.2
Cable ops · Indian Ocean	2	40.3	0	—	2.5× / 0.8
Cable ops · Black Sea	2	32.5	2	24	10× / 0.2
Spills · North Atlantic Ocean	2	28	0	—	1.0× / 2
Other · Andaman or Burma Seanew	2	26.3	1	23	new / 0
Missiles · Norwegian Seanew	2	18.9	0	—	new / 0
Exercises · Black Sea	2	16.7	0	—	1.1× / 1.8
Missiles · Black Seanew	2	14.5	1	13	new / 0
Incidents · Tasman Sea	2	11.9	0	—	1.1× / 1.8
Exercises · Andaman or Burma Sea	2	10	0	—	2.0× / 1
Surveys · Black Sea	2	9	1	20	2.5× / 0.8
Derelicts · Gulf of Mexico	2	6	0	—	3.3× / 0.6
Debris · North Pacific Oceannew	2	6	0	—	new / 0
Quakes · Philippine Sea	2	6	0	—	0.9× / 2.2
Containers · Mediterranean Sea - Eastern Basinnew	2	5.2	1	8	new / 0
Icebergs · South Atlantic Ocean	2	5	0	—	0.7× / 3
Derelicts · Celtic Sea	2	3.5	0	—	10× / 0.2
Incidents · Gulf of Thailandnew	2	3.5	0	—	new / 0
Derelicts · Philippine Seanew	2	1.1	0	—	new / 0
Derelicts · Coral Sea	2	0.7	1	13	10× / 0.2
Nav aids · South Atlantic Oceanlong running	1	299.4	9	1,380	0.1× / 6.6
Surveys · South Atlantic Ocean	1	149.3	3	141	0.6× / 1.6
Restricted · North Sea	1	124	4	283	new / 0
Nav aids · Celtic Sea	1	91.3	3	101	0.8× / 1.2
Wrecks · North Atlantic Ocean	1	62.7	2	286	5.0× / 0.2
Cable ops · Persian Gulf	1	54.3	2	133	0.8× / 1.2
Cable ops · Gulf of Mexico	1	53	1	31	0.4× / 2.8
Nav aids · Mediterranean Sea - Western Basin	1	49.9	1	286	new / 0
Restricted · Sea of Okhotsk	1	40.1	1	231	new / 0
Cable ops · North Sea	1	39.9	1	67	0.6× / 1.6
Missiles · Aegean Sea	1	33.5	1	152	new / 0
Exercises · Laccadive Sea	1	33	1	35	0.2× / 4.8
Nav aids · Bristol Channel	1	32.8	2	113	1.0× / 1
Nav aids · Inner Seas off the West Coast of Scotland	1	32	1	212	0.3× / 3.2
Cable ops · Gulf of Guinea	1	31	1	48	1.0× / 1
Cable ops · Arabian Sea	1	25.8	0	—	0.5× / 2.2
Incidents · Bay of Bengal	1	25	1	25	1.3× / 0.8
Cable ops · Laccadive Sea	1	22.5	1	22	5.0× / 0.2
Incidents · Gulf of Guinea	1	21.4	1	21	5.0× / 0.2
Incidents · Mozambique Channel	1	20	1	50	1.7× / 0.6
Cable ops · Makassar Strait	1	17.5	1	17	new / 0
Wrecks · Philippine Sea	1	17.4	1	17	5.0× / 0.2
Nav aids · Irish Sea and St. George's Channel	1	14.1	1	14	0.5× / 2.2
Piracy · South China Sea	1	10.2	0	—	1.7× / 0.6
Surveys · English Channel	1	10.1	0	—	new / 0
Wrecks · Tasman Sea	1	8.2	0	—	new / 0
Surveys · Ionian Sea	1	7.8	0	—	new / 0
Cable ops · Red Sea	1	7.7	0	—	5.0× / 0.2
Missiles · Laccadive Sea	1	6.3	0	—	5.0× / 0.2
Restricted · English Channel	1	5.8	0	—	new / 0
Missiles · Philippine Sea	1	4.9	0	—	new / 0
Cable ops · Arafura Sea	1	4.5	1	4	new / 0
Missiles · Indian Ocean	1	4.4	0	—	new / 0
Exercises · Baltic Sea	1	4.3	0	—	0.7× / 1.4
Incidents · Adriatic Sea	1	3.9	1	3	new / 0
Other · Mediterranean Sea - Eastern Basin	1	3.2	1	3	1.0× / 1
Quakes · Bismarck Sea	1	3	0	—	1.7× / 0.6
Derelicts · Caribbean Sea	1	3	0	—	2.5× / 0.4
Icebergs · Chukchi Sea	1	3	0	—	new / 0
Incidents · Gulf of Aden	1	3	0	—	new / 0
Containers · North Atlantic Ocean	1	3	0	—	5.0× / 0.2
Debris · North Atlantic Ocean	1	3	0	—	new / 0
Quakes · Norwegian Sea	1	3	0	—	new / 0
Quakes · South Atlantic Ocean	1	3	0	—	1.0× / 1
Other · Tasman Sea	1	3	0	—	2.5× / 0.4
Quakes · Bering Sea	1	2.9	1	2	2.5× / 0.4
Exercises · Indian Ocean	1	2.6	0	—	1.7× / 0.6
Cable ops · English Channel	1	2.3	0	—	0.8× / 1.2
Incidents · English Channel	1	2.2	1	2	new / 0
Nav aids · Bay of Bengal	1	2	0	—	2.5× / 0.4
Exercises · Bering Sea	1	2	0	—	1.7× / 0.6
Incidents · Mediterranean Sea - Eastern Basin	1	1.9	1	1	1.0× / 1
Cable ops · Mediterranean Sea - Eastern Basin	1	1.6	1	1	0.4× / 2.4
Wrecks · English Channel	1	1.2	1	1	5.0× / 0.2
Icebergs · Gulf of St. Lawrence	1	1.1	0	—	5.0× / 0.2
Ordnance · Black Sea	1	0.9	0	—	5.0× / 0.2
Nav aids · South Pacific Ocean	1	0.9	0	—	0.7× / 1.4
Missiles · South Pacific Ocean	1	0.8	0	—	5.0× / 0.2
Derelicts · North Sea	1	0.6	0	—	5.0× / 0.2
Exercises · Persian Gulf	1	0.4	0	—	5.0× / 0.2
Incidents · Great Australian Bight	1	0.3	0	—	1.7× / 0.6
Other · North Atlantic Ocean	1	0.3	0	—	0.6× / 1.8
Cable ops · Tyrrhenian Sea	1	0.3	0	—	new / 0
Other · South China Sea	1	0.2	1	0	5.0× / 0.2
Piracy · North Atlantic Ocean	1	0.1	0	—	new / 0
Surveys · Arctic Oceanlong running	0	310	10	699	— / 0
Surveys · Beaufort Sealong running	0	124	4	659	— / 0
Wrecks · The Northwestern Passageslong running	0	124	4	634	— / 0
Ordnance · North Sealong running	0	112.8	2	1,308	0.0× / 1.8
Exercises · Aegean Sea	0	93	3	152	0.0× / 0.2
Nav aids · Arabian Sealong running	0	93	3	664	0.0× / 0.8
Wrecks · South China Sealong running	0	93	3	563	— / 0
Wrecks · Arabian Sea	0	62	2	52	0.0× / 0.2
Surveys · Baffin Baylong running	0	62	2	699	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	372	0.0× / 1
Other · North Pacific Ocean	0	62	2	45	0.0× / 0.2
Nav aids · South China Sea	0	62	2	290	0.0× / 0.2
Surveys · The Northwestern Passages	0	62	2	292	— / 0
Other · North Sea	0	42.4	1	133	0.0× / 1
Surveys · Mediterranean Sea - Eastern Basin	0	36	1	124	0.0× / 2.4
Wrecks · Mediterranean Sea - Eastern Basin	0	35.4	1	128	— / 0
Incidents · Tyrrhenian Sea	0	35.4	1	137	0.0× / 0.2
Surveys · Barentsz Sea	0	31	1	63	— / 0
Surveys · Bering Sealong running	0	31	1	656	— / 0
Wrecks · Caribbean Sea	0	31	1	52	0.0× / 0.2
Surveys · Chukchi Sea	0	31	1	174	— / 0
Surveys · Davis Straitlong running	0	31	1	377	0.0× / 0.2
Nav aids · Eastern China Sea	0	31	1	107	— / 0
Surveys · Greenland Sea	0	31	1	132	— / 0
Derelicts · Gulf of Oman	0	31	1	150	— / 0
Exercises · Ionian Sea	0	31	1	152	— / 0
Nav aids · Kara Sea	0	31	1	267	— / 0
Mines · Kara Sea	0	31	1	153	— / 0
Surveys · Mozambique Channel	0	31	1	38	0.0× / 0.6
Structures · North Sea	0	31	1	290	— / 0
Wrecks · North Sea	0	31	1	241	0.0× / 0.4
Other · Persian Gulf	0	31	1	263	0.0× / 0.2
Restricted · Persian Gulflong running	0	31	1	546	0.0× / 0.2
Surveys · Persian Gulflong running	0	31	1	386	0.0× / 0.2
Wrecks · Persian Gulflong running	0	31	1	524	— / 0
Volcanic · Philippine Sea	0	31	1	32	0.0× / 0.2
Volcanic · Red Sea	0	31	1	145	— / 0
Nav aids · Sea of Okhotsk	0	31	1	163	— / 0
Wrecks · Sea of Okhotsk	0	31	1	170	— / 0
Spills · South Atlantic Ocean	0	31	1	202	— / 0
Restricted · South Atlantic Ocean	0	31	1	111	0.0× / 0.4
Wrecks · South Atlantic Oceanlong running	0	31	1	750	0.0× / 0.6
Debris · South Pacific Ocean	0	31	1	86	0.0× / 0.4
Wrecks · South Pacific Oceanlong running	0	31	1	454	— / 0
Other · The Northwestern Passageslong running	0	31	1	670	— / 0
Wrecks · Yellow Sea	0	31	1	164	— / 0
Cable ops · South Pacific Ocean	0	18.4	0	—	0.0× / 0.6
Incidents · Andaman or Burma Sea	0	15.8	0	—	0.0× / 0.4
Surveys · Gulf of Suez	0	14	0	—	0.0× / 0.2
Incidents · Eastern China Sea	0	13	0	—	0.0× / 0.2
Incidents · Davis Strait	0	11.4	0	—	0.0× / 0.6
Towing · South China Sea	0	7.7	0	—	0.0× / 0.2
Surveys · North Atlantic Ocean	0	6.4	0	—	0.0× / 1.4
Incidents · Bay of Biscay	0	4.4	0	—	0.0× / 0.2
Other · Davis Strait	0	4.4	0	—	— / 0
Piracy · Gulf of Aden	0	4.4	0	—	0.0× / 1.2
Exercises · Japan Sea	0	4.4	0	—	0.0× / 5.6
Incidents · Laccadive Sea	0	4.4	0	—	0.0× / 0.4
Cable ops · Andaman or Burma Sea	0	3.5	0	—	0.0× / 0.2
Quakes · Banda Sea	0	2.8	0	—	0.0× / 0.2
Other · Indian Ocean	0	2	0	—	0.0× / 0.6
Cable ops · Mozambique Channel	0	1.3	0	—	0.0× / 0.4
Quakes · Solomon Sea	0	0.8	0	—	0.0× / 2.8
Surveys · Arabian Sea	0	0	0	—	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2012-05, 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.