Sea Ledger, March 2012

2012-03-01 to 2012-03-31 · archive

issued: 485
warning-days in force: 7,303
in force at month end: 212
sea × type cells: 193

baseline: same month, previous 5 years (2011-03, 2010-03, 2009-03, 2008-03, 2007-03)

By type

type	issued	warning-days	in force at end
Incidents	96	938.2	19
Exercises	88	821.7	28
Nav aids	61	1,536	45
Cable ops	58	747.8	23
Icebergs	38	50.8	2
Derelicts	36	124.6	3
Quakes	27	85.2	0
Piracy	21	152.4	4
Surveys	21	1,186.1	38
Missiles	11	117.6	3
Other	8	323.2	11
Spills	6	147	2
Debris	5	36.8	1
Wrecks	3	541.6	17
Restricted	2	168.9	7
Ordnance	2	125.6	4
Containers	1	3	0
Towing	1	41.5	0
Structures	0	31	1
Mines	0	31	1
Volcanic	0	31	1
War risk	0	62	2

By sea and type · 193 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	35	255.4	5	65	1.3× / 27.4
Incidents · North Pacific Oceansurge	23	128.5	3	69	2.5× / 9.4
Icebergs · Labrador Seasurge	20	22	0	—	17× / 1.2
Exercises · Bay of Bengal	13	105.2	2	32	1.9× / 6.8
Piracy · Arabian Sea	13	98.1	1	32	1.0× / 13.2
Exercises · North Pacific Ocean	13	66.9	2	64	1.2× / 10.8
Exercises · South Atlantic Oceansurge	12	78.6	6	25	2.0× / 6
Quakes · North Pacific Ocean	12	38.6	0	—	0.3× / 44.6
Icebergs · Gulf of St. Lawrencenew	12	10.9	2	27	new / 0
Incidents · South Atlantic Oceansurge	10	26.1	2	75	2.0× / 5
Nav aids · Coral Seasurge	10	11.8	0	—	2.9× / 3.4
Nav aids · North Sea	9	326.5	8	135	1.2× / 7.6
Surveys · South Atlantic Oceansurge	9	245.7	8	161	3.0× / 3
Incidents · North Atlantic Ocean	9	122.2	2	53	1.8× / 5
Incidents · South China Seasurge	9	98.9	3	42	2.5× / 3.6
Incidents · South Pacific Ocean	9	61.2	1	55	1.7× / 5.2
Quakes · South Pacific Ocean	9	27	0	—	0.7× / 13
Cable ops · North Atlantic Ocean	8	124.5	5	67	1.6× / 5
Exercises · Black Seasurge	8	74.4	2	31	20× / 0.4
Nav aids · South Atlantic Oceanlong running	7	289	11	1,319	1.9× / 3.6
Exercises · Philippine Seasurge	7	67	2	35	3.2× / 2.2
Exercises · Arabian Sea	7	50.7	4	31	1.5× / 4.8
Derelicts · Indian Oceansurge	7	15.7	0	—	3.2× / 2.2
Nav aids · North Atlantic Oceansurgelong running	6	97.7	2	669	3.0× / 2
Incidents · Indian Ocean	6	75.9	0	—	1.5× / 4
Piracy · Indian Ocean	6	26	3	14	0.8× / 7.8
Derelicts · North Atlantic Oceansurge	6	15.5	0	—	6.0× / 1
Exercises · South Pacific Oceansurge	5	20.5	0	—	2.1× / 2.4
Derelicts · South Atlantic Ocean	5	9.8	0	—	1.7× / 3
Incidents · Caribbean Seasurge	4	111.8	1	66	5.0× / 0.8
Nav aids · North Pacific Oceansurge	4	79.8	2	321	2.0× / 2
Nav aids · English Channel	4	45.3	3	21	1.7× / 2.4
Exercises · Yellow Sea	4	42.4	1	38	0.7× / 5.8
Missiles · North Pacific Ocean	4	41.7	2	55	0.7× / 6
Exercises · North Atlantic Ocean	4	36.3	2	60	0.6× / 6.6
Nav aids · Mediterranean Sea - Western Basinsurge	3	105.7	4	225	7.5× / 0.4
Exercises · South China Seasurge	3	74.4	2	35	3.0× / 1
Spills · Gulf of Mexico	3	70	0	—	0.6× / 5
Nav aids · Inner Seas off the West Coast of Scotland	3	42.6	1	151	0.8× / 3.6
Cable ops · North Seasurge	3	22.9	2	36	5.0× / 0.6
Cable ops · Mozambique Channelsurge	3	22.3	1	23	7.5× / 0.4
Icebergs · Southern Ocean	3	10.9	0	—	1.7× / 1.8
Derelicts · North Pacific Oceansurge	3	8.7	1	8	3.0× / 1
Exercises · Baltic Sea	3	8.3	1	32	1.0× / 3
Incidents · Tasman Sea	3	8.1	0	—	1.7× / 1.8
Incidents · Coral Sea	3	5.1	0	—	0.7× / 4.6
Nav aids · Arafura Seasurge	3	1.1	0	—	5.0× / 0.6
Nav aids · Gulf of Alaska	3	0.7	0	—	1.4× / 2.2
Incidents · Mozambique Channel	2	79.7	1	44	3.3× / 0.6
Restricted · North Seanew	2	75.9	4	222	new / 0
Incidents · Laccadive Seanew	2	69.8	1	67	new / 0
Incidents · Gulf of Mexico	2	34	1	56	10× / 0.2
Debris · South Pacific Ocean	2	28.9	1	25	5.0× / 0.4
Spills · The Coastal Waters of Southeast Alaska and British Columbia	2	27	1	23	5.0× / 0.4
Incidents · Mediterranean Sea - Eastern Basin	2	26	2	37	1.0× / 2
Surveys · Philippine Sea	2	23.8	1	23	10× / 0.2
Incidents · Bay of Bengal	2	23.7	0	—	10× / 0.2
Missiles · South Atlantic Oceannew	2	18.1	0	—	new / 0
Cable ops · South China Sea	2	15.4	2	13	0.8× / 2.4
Surveys · Black Sea	2	14.7	1	30	5.0× / 0.4
Derelicts · Caribbean Sea	2	14.7	0	—	2.5× / 0.8
Missiles · North Atlantic Ocean	2	12.1	0	—	0.8× / 2.6
Quakes · Philippine Sea	2	7.6	0	—	0.6× / 3.2
Derelicts · Arabian Sea	2	6	0	—	10× / 0.2
Quakes · Indian Ocean	2	6	0	—	0.6× / 3.4
Debris · Arafura Sea	2	4.9	0	—	10× / 0.2
Incidents · Solomon Sea	2	4.5	0	—	10× / 0.2
Icebergs · North Atlantic Ocean	2	4	0	—	1.0× / 2
Exercises · Coral Sea	2	3.9	0	—	2.5× / 0.8
Exercises · Mediterranean Sea - Eastern Basin	2	3.9	0	—	1.1× / 1.8
Derelicts · Tasman Sea	2	3	0	—	5.0× / 0.4
Derelicts · Persian Gulfnew	2	2.9	0	—	new / 0
Incidents · Timor Sea	2	1.4	0	—	5.0× / 0.4
Nav aids · Irish Sea and St. George's Channel	2	0.5	0	—	0.8× / 2.6
Ordnance · North Sealong running	1	122.4	4	1,247	5.0× / 0.2
Exercises · Aegean Sea	1	93	3	91	1.0× / 1
Nav aids · Arabian Sealong running	1	84.3	3	603	5.0× / 0.2
Cable ops · Andaman or Burma Sea	1	75.5	1	64	5.0× / 0.2
Nav aids · Celtic Sea	1	64.4	2	60	0.4× / 2.4
Other · North Pacific Ocean	1	62.5	2	299	0.8× / 1.2
Surveys · Mediterranean Sea - Eastern Basin	1	61.4	2	63	0.5× / 2
Other · North Sea	1	54	2	72	1.0× / 1
Towing · Arabian Sea	1	41.5	0	—	new / 0
Surveys · Persian Gulf	1	39	1	325	new / 0
Wrecks · South Pacific Oceanlong running	1	36.9	1	393	5.0× / 0.2
Other · Mediterranean Sea - Eastern Basin	1	36	2	191	1.0× / 1
Other · Persian Gulf	1	35.1	2	202	new / 0
Exercises · Laccadive Sea	1	33.2	0	—	0.2× / 5
Cable ops · Gulf of Mexico	1	24.9	0	—	0.8× / 1.2
Surveys · North Sea	1	20.4	1	20	1.3× / 0.8
Surveys · Andaman or Burma Sea	1	20.3	0	—	5.0× / 0.2
Cable ops · Gulf of Aden	1	19.7	1	19	new / 0
Cable ops · Arabian Sea	1	19.5	1	19	0.6× / 1.8
Piracy · Gulf of Guinea	1	18.8	0	—	new / 0
Incidents · Arabian Sea	1	18.1	0	—	1.7× / 0.6
Other · South Atlantic Ocean	1	16.2	0	—	0.6× / 1.6
Exercises · Caribbean Sea	1	15.4	0	—	1.7× / 0.6
Exercises · Gulf of Mexico	1	15.4	0	—	2.5× / 0.4
Cable ops · Indian Ocean	1	15.3	1	15	1.0× / 1
Spills · North Pacific Ocean	1	14	0	—	1.3× / 0.8
Other · South Pacific Ocean	1	13.8	1	13	new / 0
Cable ops · Malacca Strait	1	11.6	1	11	new / 0
Surveys · North Pacific Ocean	1	10.7	0	—	1.7× / 0.6
Piracy · Gulf of Aden	1	9.5	0	—	0.8× / 1.2
Cable ops · Gulf of Guinea	1	9	0	—	1.7× / 0.6
Other · Caribbean Sea	1	8.1	0	—	5.0× / 0.2
Surveys · North Atlantic Ocean	1	8	0	—	5.0× / 0.2
Missiles · Barentsz Sea	1	7.4	0	—	1.3× / 0.8
Missiles · South Pacific Ocean	1	6.1	0	—	new / 0
Incidents · Persian Gulf	1	5.5	0	—	2.5× / 0.4
Nav aids · Skagerrak	1	5.4	0	—	new / 0
Incidents · Eastern China Sea	1	4.1	0	—	5.0× / 0.2
Ordnance · Yellow Sea	1	3.2	0	—	new / 0
Derelicts · Coral Sea	1	3.1	0	—	1.7× / 0.6
Surveys · Arabian Sea	1	3	1	3	1.3× / 0.8
Quakes · Bismarck Sea	1	3	0	—	5.0× / 0.2
Debris · Coral Sea	1	3	0	—	2.5× / 0.4
Derelicts · Gulf of Mexico	1	3	0	—	5.0× / 0.2
Icebergs · Hudson Strait	1	3	0	—	new / 0
Derelicts · Laccadive Sea	1	3	0	—	5.0× / 0.2
Quakes · Sea of Okhotsk	1	3	0	—	1.7× / 0.6
Derelicts · South Pacific Ocean	1	3	0	—	1.3× / 0.8
Containers · Tyrrhenian Sea	1	3	0	—	new / 0
Derelicts · Eastern China Sea	1	2.6	1	2	new / 0
Surveys · Barentsz Sea	1	2.1	1	2	new / 0
Other · North Atlantic Ocean	1	2.1	0	—	1.3× / 0.8
Incidents · Bismarck Sea	1	1.9	1	1	2.5× / 0.4
Derelicts · South China Sea	1	1.4	0	—	1.3× / 0.8
Nav aids · Tasman Sea	1	1.3	0	—	1.7× / 0.6
Missiles · Mediterranean Sea - Eastern Basin	1	1.2	0	—	new / 0
Exercises · Sulu Sea	1	1.2	0	—	new / 0
Derelicts · Timor Sea	1	1.2	0	—	2.5× / 0.4
Nav aids · Barentsz Sea	1	0.7	0	—	new / 0
Incidents · Southern Ocean	1	0.7	0	—	5.0× / 0.2
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	0.5	0	—	0.3× / 3
Wrecks · Coral Sea	1	0.4	1	0	new / 0
Nav aids · Bass Strait	1	0.2	0	—	0.7× / 1.4
Wrecks · Inner Seas off the West Coast of Scotland	1	0.2	0	—	new / 0
Incidents · Celtic Sea	1	0	0	—	new / 0
Surveys · Arctic Oceanlong running	0	310	10	638	— / 0
Surveys · Beaufort Sealong running	0	124	4	598	— / 0
Wrecks · The Northwestern Passageslong running	0	124	4	573	— / 0
Wrecks · South China Sealong running	0	71.4	2	502	— / 0
Cable ops · Persian Gulf	0	66.3	2	173	0.0× / 1.2
Surveys · Baffin Baylong running	0	62	2	638	— / 0
Nav aids · Gulf of Mexico	0	62	2	144	0.0× / 2
War risk · Mediterranean Sea - Eastern Basin	0	62	2	311	— / 0
Wrecks · North Atlantic Ocean	0	62	2	225	— / 0
Nav aids · South China Sea	0	62	2	229	0.0× / 0.2
Surveys · The Northwestern Passages	0	62	2	231	— / 0
Cable ops · South Pacific Ocean	0	55.4	1	312	0.0× / 1.2
Surveys · Gulf of Suez	0	55	0	—	— / 0
Nav aids · Red Sea	0	44.5	0	—	— / 0
Nav aids · Bay of Bengal	0	31.6	0	—	0.0× / 0.4
Missiles · Aegean Sea	0	31	1	91	— / 0
Nav aids · Andaman or Burma Sea	0	31	1	53	0.0× / 0.4
Wrecks · Arabian Sea	0	31	1	32	— / 0
Other · Bay of Bengal	0	31	1	40	0.0× / 0.2
Surveys · Bering Sealong running	0	31	1	595	— / 0
Nav aids · Bristol Channel	0	31	1	52	0.0× / 0.6
Surveys · Chukchi Sea	0	31	1	113	— / 0
Surveys · Davis Strait	0	31	1	316	— / 0
Nav aids · Eastern China Sea	0	31	1	46	— / 0
Surveys · Greenland Sea	0	31	1	71	— / 0
Derelicts · Gulf of Oman	0	31	1	89	— / 0
Exercises · Ionian Sea	0	31	1	91	— / 0
Nav aids · Kara Sea	0	31	1	206	— / 0
Mines · Kara Sea	0	31	1	92	— / 0
Wrecks · Mediterranean Sea - Eastern Basin	0	31	1	67	— / 0
Structures · North Sea	0	31	1	229	— / 0
Wrecks · North Sea	0	31	1	180	— / 0
Restricted · Persian Gulflong running	0	31	1	485	0.0× / 0.2
Wrecks · Persian Gulflong running	0	31	1	463	0.0× / 0.2
Volcanic · Red Sea	0	31	1	84	— / 0
Nav aids · Sea of Okhotsk	0	31	1	102	— / 0
Restricted · Sea of Okhotsk	0	31	1	170	— / 0
Wrecks · Sea of Okhotsk	0	31	1	109	— / 0
Spills · South Atlantic Ocean	0	31	1	141	— / 0
Restricted · South Atlantic Ocean	0	31	1	50	0.0× / 0.2
Wrecks · South Atlantic Oceanlong running	0	31	1	689	0.0× / 0.2
Other · The Northwestern Passageslong running	0	31	1	609	— / 0
Incidents · Tyrrhenian Sea	0	31	1	76	— / 0
Wrecks · Yellow Sea	0	31	1	103	— / 0
Wrecks · Irish Sea and St. George's Channel	0	29.7	0	—	— / 0
Other · English Channel	0	24.4	0	—	0.0× / 0.6
Nav aids · Mediterranean Sea - Eastern Basin	0	23.4	0	—	— / 0
Other · Andaman or Burma Sea	0	9	0	—	— / 0
Cable ops · Adriatic Sea	0	6	0	—	0.0× / 0.2
Spills · North Atlantic Ocean	0	5	0	—	0.0× / 1.6
Cable ops · English Channel	0	4.1	0	—	0.0× / 0.4
Cable ops · Bay of Bengal	0	0	0	—	0.0× / 3.4
Cable ops · Mediterranean Sea - Eastern Basin	0	0	0	—	0.0× / 2
Cable ops · Sulu Sea	0	0	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2012-03, 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.