Sea Ledger, February 2012

2012-02-01 to 2012-02-29 · archive

issued: 435
warning-days in force: 6,468
in force at month end: 229
sea × type cells: 196

baseline: same month, previous 5 years (2011-02, 2010-02, 2009-02, 2008-02, 2007-02)

By type

type	issued	warning-days	in force at end
Incidents	87	905	41
Exercises	73	656	18
Nav aids	69	1,325.1	50
Cable ops	57	882.3	24
Quakes	37	108	2
Icebergs	28	44.1	3
Derelicts	14	76.3	2
Piracy	13	68.9	4
Missiles	12	115	3
Surveys	11	928.7	34
Other	10	263.2	9
Spills	8	137	6
Wrecks	7	546.3	19
Debris	3	9	0
Restricted	2	143.7	5
Containers	2	6	0
Volcanic	1	44	1
Towing	1	5.7	1
War risk	0	58	2
Ordnance	0	88	3
Structures	0	29	1
Mines	0	29	1

By sea and type · 196 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	35	316.9	8	102	1.9× / 18
Incidents · North Pacific Oceansurge	28	107.2	7	38	3.7× / 7.6
Icebergs · Labrador Seasurge	18	18.3	2	23	23× / 0.8
Nav aids · North Seasurge	14	296.7	12	104	2.3× / 6
Exercises · North Pacific Ocean	13	92.9	2	63	1.4× / 9.6
Incidents · South China Seasurge	12	106.1	6	61	3.0× / 4
Incidents · South Pacific Oceansurge	10	98.8	2	60	2.1× / 4.8
Exercises · Bay of Bengal	9	63.4	2	33	1.7× / 5.2
Incidents · North Atlantic Ocean	8	93.8	6	49	1.4× / 5.8
Quakes · South Pacific Ocean	8	25.2	0	—	0.4× / 20.8
Exercises · South Pacific Oceansurge	8	25.1	0	—	3.1× / 2.6
Quakes · North Pacific Oceansurge	8	21.4	1	25	2.4× / 3.4
Spills · Gulf of Mexico	7	87	4	41	1.8× / 3.8
Nav aids · North Atlantic Oceanlong running	7	84.5	2	638	1.8× / 4
Quakes · Philippine Sea	7	19.4	1	25	1.8× / 4
Incidents · Indian Oceansurge	7	5.4	2	14	2.9× / 2.4
Exercises · Yellow Sea	6	43	2	35	1.4× / 4.4
Piracy · Arabian Sea	6	32.2	2	41	1.4× / 4.4
Quakes · Coral Seasurge	6	18	0	—	6.0× / 1
Derelicts · Indian Oceansurge	6	18	0	—	3.3× / 1.8
Other · Solomon Seanew	6	8.9	0	—	new / 0
Exercises · Arabian Sea	5	56.6	1	33	1.0× / 5
Missiles · North Pacific Ocean	5	46.4	2	58	0.8× / 6
Exercises · Coral Seasurge	5	10.3	0	—	8.3× / 0.6
Nav aids · Bass Straitsurge	5	1	0	—	5.0× / 1
Surveys · South Atlantic Oceansurge	4	129.2	7	130	2.0× / 2
Exercises · South China Seasurge	4	83.7	2	33	2.0× / 2
Cable ops · North Atlantic Ocean	4	69.8	1	119	0.8× / 5.2
Cable ops · North Seasurge	4	25.1	1	23	20× / 0.2
Icebergs · Southern Oceansurge	4	11.8	1	30	2.5× / 1.6
Nav aids · Gulf of Alaska	4	10.2	0	—	1.7× / 2.4
Icebergs · Davis Straitnew	4	8	0	—	new / 0
Nav aids · Coral Sea	4	5	1	20	1.3× / 3
Nav aids · South Atlantic Oceanlong running	3	252.8	9	1,288	1.3× / 2.4
Incidents · South Atlantic Ocean	3	120.1	2	50	0.5× / 6.2
Nav aids · Celtic Sea	3	59	2	148	1.5× / 2
Incidents · Laccadive Seasurge	3	56.7	4	36	15× / 0.2
Wrecks · Arabian Seanew	3	53.9	1	274	new / 0
Incidents · Mozambique Channelsurge	3	47.7	3	54	5.0× / 0.6
Exercises · Philippine Sea	3	36.7	1	27	1.4× / 2.2
Missiles · North Atlantic Ocean	3	19.3	0	—	1.5× / 2
Exercises · South Atlantic Ocean	3	17.4	0	—	0.8× / 3.8
Piracy · Indian Oceansurge	3	15.2	0	—	5.0× / 0.6
Piracy · Gulf of Guineanew	3	14	1	19	new / 0
Quakes · Solomon Seasurge	3	9	0	—	2.1× / 1.4
Exercises · Black Seanew	3	7.4	1	23	new / 0
Derelicts · South Atlantic Oceansurge	3	7.1	0	—	2.1× / 1.4
Nav aids · English Channel	3	7	0	—	0.9× / 3.2
Nav aids · Irish Sea and St. George's Channel	3	3.1	0	—	1.3× / 2.4
Nav aids · Tasman Seasurge	3	2.4	0	—	7.5× / 0.4
Incidents · Caribbean Sea	2	131.8	5	35	2.0× / 1
Nav aids · Mediterranean Sea - Western Basin	2	64.4	3	194	5.0× / 0.4
Nav aids · Gulf of Mexico	2	53.4	2	113	0.9× / 2.2
Cable ops · Andaman or Burma Seanew	2	50.7	2	33	new / 0
Wrecks · South China Seanewlong running	2	50.7	3	471	new / 0
Nav aids · Red Sealong running	2	36.1	3	408	10× / 0.2
Exercises · Laccadive Sea	2	32.9	1	30	0.5× / 3.8
Surveys · Gulf of Suez	2	27.2	2	56	10× / 0.2
Nav aids · Bristol Channel	2	23.2	1	21	3.3× / 0.6
Other · Andaman or Burma Seanew	2	21.4	1	21	new / 0
Cable ops · Eastern China Sea	2	20.5	0	—	5.0× / 0.4
Surveys · Arabian Seanew	2	17.2	0	—	new / 0
Missiles · Southern Ocean	2	8.5	0	—	10× / 0.2
Cable ops · Mozambique Channel	2	8.2	0	—	5.0× / 0.4
Exercises · Baltic Sea	2	6.8	1	26	1.4× / 1.4
Derelicts · Coral Sea	2	6.4	1	29	5.0× / 0.4
Quakes · South Atlantic Ocean	2	6	0	—	1.3× / 1.6
Nav aids · South Pacific Ocean	2	2.9	0	—	1.4× / 1.4
Exercises · Bering Seanew	2	2.5	0	—	new / 0
Nav aids · Great Australian Bight	2	0.4	0	—	1.4× / 1.4
Surveys · Arctic Oceanlong running	1	262.4	10	607	new / 0
Exercises · Aegean Sea	1	92.1	3	60	1.7× / 0.6
Nav aids · North Pacific Ocean	1	90.4	3	290	0.6× / 1.8
Other · North Pacific Ocean	1	61	2	268	1.0× / 1
Cable ops · Persian Gulf	1	59.7	3	142	1.7× / 0.6
Nav aids · Bay of Bengal	1	44.5	2	56	2.5× / 0.4
Exercises · North Atlantic Ocean	1	32.3	1	29	0.5× / 2
Nav aids · Inner Seas off the West Coast of Scotland	1	30.8	1	120	0.7× / 1.4
Cable ops · Adriatic Sea	1	29	1	60	new / 0
Wrecks · Irish Sea and St. George's Channel	1	29	1	93	new / 0
Other · Bay of Bengal	1	26.9	1	117	1.7× / 0.6
Incidents · Gulf of Mexico	1	25.1	1	25	2.5× / 0.4
Incidents · Gulf of Thailand	1	24.2	0	—	new / 0
Nav aids · Andaman or Burma Sea	1	22.5	1	22	5.0× / 0.2
Cable ops · Mediterranean Sea - Eastern Basin	1	22.3	1	72	0.4× / 2.6
Restricted · South Atlantic Ocean	1	20	1	19	5.0× / 0.2
Surveys · Inner Seas off the West Coast of Scotland	1	17	0	—	new / 0
Cable ops · South China Sea	1	16	0	—	0.8× / 1.2
Nav aids · Eastern China Sea	1	15.9	1	15	5.0× / 0.2
Cable ops · Philippine Sea	1	12.4	0	—	5.0× / 0.2
Volcanic · South Pacific Ocean	1	11.6	0	—	2.5× / 0.4
Cable ops · Aegean Sea	1	11	0	—	5.0× / 0.2
Incidents · Bay of Bengal	1	9.1	0	—	0.7× / 1.4
Spills · North Atlantic Ocean	1	9	1	9	0.4× / 2.4
Incidents · Eastern China Sea	1	8.1	0	—	5.0× / 0.2
Restricted · Strait of Gibraltar	1	7.7	0	—	new / 0
Incidents · Sulu Sea	1	7.6	0	—	new / 0
Piracy · Gulf of Aden	1	7.5	1	7	0.7× / 1.4
Missiles · Black Sea	1	7.1	0	—	new / 0
Wrecks · Mozambique Channel	1	6.7	0	—	new / 0
Incidents · Mediterranean Sea - Eastern Basin	1	6.4	1	6	0.7× / 1.4
Exercises · Andaman or Burma Sea	1	5.9	0	—	1.7× / 0.6
Exercises · Sulu Sea	1	5.9	0	—	new / 0
Towing · Arabian Sea	1	5.7	1	5	new / 0
Exercises · Celtic Sea	1	5.2	0	—	5.0× / 0.2
Surveys · Southern Ocean	1	4.8	0	—	new / 0
Missiles · Laccadive Sea	1	4.7	0	—	5.0× / 0.2
Incidents · Arabian Sea	1	4.4	1	4	0.7× / 1.4
Exercises · Indian Ocean	1	3.4	0	—	1.7× / 0.6
Cable ops · English Channel	1	3.2	1	3	1.3× / 0.8
Derelicts · Arabian Sea	1	3	0	—	1.3× / 0.8
Quakes · Arabian Sea	1	3	0	—	new / 0
Derelicts · Caribbean Sea	1	3	0	—	5.0× / 0.2
Icebergs · Hudson Strait	1	3	0	—	new / 0
Quakes · Indian Ocean	1	3	0	—	0.3× / 3.8
Containers · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Quakes · Molukka Sea	1	3	0	—	0.5× / 2.2
Debris · North Atlantic Ocean	1	3	0	—	2.5× / 0.4
Derelicts · North Atlantic Ocean	1	3	0	—	0.4× / 2.6
Containers · North Sea	1	3	0	—	new / 0
Debris · Norwegian Sea	1	3	0	—	new / 0
Debris · South Pacific Ocean	1	3	0	—	2.5× / 0.4
Icebergs · South Pacific Ocean	1	3	0	—	2.5× / 0.4
Exercises · Alboran Sea	1	1.8	0	—	5.0× / 0.2
Exercises · Mediterranean Sea - Eastern Basin	1	1.7	0	—	0.6× / 1.6
Incidents · Philippine Sea	1	1.6	0	—	0.7× / 1.4
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	1.5	0	—	0.8× / 1.2
Nav aids · Timor Sea	1	1.5	0	—	2.5× / 0.4
Cable ops · Baltic Sea	1	1.4	0	—	new / 0
Incidents · Coral Sea	1	0.5	0	—	0.4× / 2.8
Incidents · Arafura Sea	1	0.3	0	—	2.5× / 0.4
Nav aids · Indian Ocean	1	0.2	0	—	0.7× / 1.4
Incidents · Solomon Sea	1	0.1	0	—	5.0× / 0.2
Surveys · Beaufort Sealong running	0	116	4	567	— / 0
Wrecks · The Northwestern Passageslong running	0	116	4	542	— / 0
Ordnance · North Sealong running	0	87	3	1,216	0.0× / 0.2
Nav aids · Arabian Sealong running	0	58	2	572	0.0× / 0.6
Surveys · Baffin Baylong running	0	58	2	607	— / 0
Cable ops · Gulf of Mexico	0	58	2	137	0.0× / 1.2
War risk · Mediterranean Sea - Eastern Basin	0	58	2	280	— / 0
Wrecks · North Atlantic Ocean	0	58	2	194	— / 0
Restricted · North Sea	0	58	2	191	— / 0
Nav aids · South China Sea	0	58	2	198	— / 0
Cable ops · South Pacific Ocean	0	58	2	281	0.0× / 0.8
Wrecks · South Pacific Ocean	0	58	2	362	0.0× / 0.2
Surveys · The Northwestern Passages	0	58	2	200	— / 0
Nav aids · Mediterranean Sea - Eastern Basin	0	41.7	1	53	— / 0
Cable ops · Bay of Bengal	0	32	1	63	0.0× / 2.6
Missiles · Aegean Sea	0	29	1	60	— / 0
Surveys · Bering Sealong running	0	29	1	564	— / 0
Surveys · Chukchi Sea	0	29	1	82	— / 0
Surveys · Davis Strait	0	29	1	285	— / 0
Other · English Channel	0	29	1	33	0.0× / 0.4
Surveys · Greenland Sea	0	29	1	40	— / 0
Derelicts · Gulf of Oman	0	29	1	58	— / 0
Exercises · Ionian Sea	0	29	1	60	— / 0
Nav aids · Kara Sea	0	29	1	175	— / 0
Mines · Kara Sea	0	29	1	61	— / 0
Other · Mediterranean Sea - Eastern Basin	0	29	1	160	0.0× / 0.4
Surveys · Mediterranean Sea - Eastern Basin	0	29	1	32	0.0× / 2.6
Wrecks · Mediterranean Sea - Eastern Basin	0	29	1	36	— / 0
Surveys · North Atlantic Ocean	0	29	1	32	0.0× / 1.4
Other · North Sea	0	29	1	41	0.0× / 1.2
Structures · North Sea	0	29	1	198	0.0× / 0.6
Wrecks · North Sea	0	29	1	149	— / 0
Other · Persian Gulf	0	29	1	171	0.0× / 0.4
Restricted · Persian Gulflong running	0	29	1	454	— / 0
Surveys · Persian Gulf	0	29	1	294	— / 0
Wrecks · Persian Gulflong running	0	29	1	432	0.0× / 0.8
Volcanic · Red Sea	0	29	1	53	— / 0
Nav aids · Sea of Okhotsk	0	29	1	71	— / 0
Restricted · Sea of Okhotsk	0	29	1	139	— / 0
Wrecks · Sea of Okhotsk	0	29	1	78	— / 0
Spills · South Atlantic Ocean	0	29	1	110	— / 0
Wrecks · South Atlantic Oceanlong running	0	29	1	658	0.0× / 0.4
Cable ops · Sulu Sea	0	29	1	79	— / 0
Other · The Northwestern Passageslong running	0	29	1	578	— / 0
Incidents · Tyrrhenian Sea	0	29	1	45	— / 0
Wrecks · Yellow Sea	0	29	1	72	— / 0
Cable ops · Gulf of Guinea	0	28.6	0	—	0.0× / 0.6
Surveys · Mozambique Channel	0	23.9	0	—	0.0× / 0.2
Cable ops · Arabian Sea	0	22.8	0	—	0.0× / 3
Surveys · Black Sea	0	12	0	—	— / 0
Incidents · Japan Sea	0	10.4	0	—	0.0× / 0.6
Spills · Gulf of Alaska	0	10	0	—	0.0× / 0.4
Incidents · Bismarck Sea	0	7.2	0	—	0.0× / 0.4
Cable ops · Sea of Marmara	0	5.7	0	—	— / 0
Derelicts · Bay of Biscay	0	3.4	0	—	0.0× / 0.2
Derelicts · Gulf of Mexico	0	3.4	0	—	— / 0
Volcanic · North Atlantic Ocean	0	3.4	0	—	— / 0
Incidents · Sea of Okhotsk	0	3.4	0	—	— / 0
Spills · Arabian Sea	0	2	0	—	— / 0
Cable ops · Indian Ocean	0	2	0	—	0.0× / 1.2
Ordnance · Philippine Sea	0	1	0	—	0.0× / 0.2
Other · Inner Seas off the West Coast of Scotland	0	0	0	—	0.0× / 0.4
Surveys · Laccadive Sea	0	0	0	—	0.0× / 0.4

Cite: seahazards.com Sea Ledger, 2012-02, 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.