Sea Ledger, November 2012

2012-11-01 to 2012-11-30 · archive

issued: 500
warning-days in force: 7,919
in force at month end: 263
sea × type cells: 213

baseline: same month, previous 5 years (2011-11, 2010-11, 2009-11, 2008-11, 2007-11)

By type

type	issued	warning-days	in force at end
Incidents	121	857.2	38
Exercises	89	839.6	21
Nav aids	68	1,771.9	62
Cable ops	61	1,205.4	40
Quakes	34	94	5
Icebergs	32	41.4	2
Missiles	29	209.2	6
Derelicts	19	100.2	2
Surveys	15	1,242.6	37
Other	12	418.3	13
Debris	5	10.2	1
Wrecks	4	545.9	18
Piracy	4	18.3	1
Ordnance	3	101.2	3
Spills	3	85	1
Restricted	1	255.9	9
War risk	0	60	2
Containers	0	2.6	0
Structures	0	30	1
Volcanic	0	30	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Incidents · North Pacific Ocean	33	124.2	6	66	1.9× / 17
Icebergs · Davis Straitnew	22	24.6	1	22	new / 0
Cable ops · South Atlantic Ocean	18	197.3	7	71	0.9× / 20.8
Incidents · Indian Oceansurge	17	30.1	2	31	2.7× / 6.2
Incidents · North Atlantic Ocean	16	216	7	57	1.6× / 10
Nav aids · North Sea	14	242	9	294	1.6× / 8.8
Cable ops · North Atlantic Oceansurge	13	137.8	3	121	2.4× / 5.4
Nav aids · South Atlantic Oceanlong running	11	454.9	15	1,563	1.7× / 6.6
Exercises · Arabian Seasurge	10	78.2	2	32	2.3× / 4.4
Exercises · Mediterranean Sea - Eastern Basinsurge	10	46.5	0	—	10× / 1
Incidents · Mediterranean Sea - Eastern Basinsurge	9	66.1	4	43	7.5× / 1.2
Exercises · South Atlantic Ocean	9	58.5	0	—	0.8× / 11.2
Exercises · North Pacific Ocean	9	45.5	1	34	1.0× / 8.8
Quakes · North Pacific Ocean	9	23.8	1	31	1.7× / 5.2
Quakes · South Pacific Ocean	9	23.2	2	24	0.6× / 14.2
Incidents · South China Sea	8	82.1	3	52	1.0× / 8.2
Exercises · Bay of Bengal	8	80.6	3	35	1.0× / 8.2
Nav aids · Gulf of Mexicosurgelong running	8	68.5	3	388	4.0× / 2
Incidents · South Pacific Ocean	8	43.7	3	36	1.2× / 6.8
Exercises · Yellow Sea	8	43.2	2	36	1.3× / 6
Exercises · Coral Seanew	8	18.1	0	—	new / 0
Missiles · North Pacific Ocean	7	59	1	60	1.0× / 7
Derelicts · North Pacific Oceansurge	7	9.5	0	—	5.8× / 1.2
Nav aids · Gulf of Alaskasurge	6	11.8	2	28	5.0× / 1.2
Icebergs · Hudson Straitnew	6	6.7	0	—	new / 0
Exercises · Aegean Seasurge	5	141.5	4	335	25× / 0.2
Nav aids · North Atlantic Ocean	5	41.4	3	62	0.8× / 6
Missiles · Barentsz Seasurge	5	26.9	2	35	2.8× / 1.8
Other · South Atlantic Oceansurge	5	16.3	1	25	2.8× / 1.8
Surveys · North Seanew	5	16	0	—	new / 0
Nav aids · Inner Seas off the West Coast of Scotland	5	5.3	1	29	1.6× / 3.2
Exercises · Philippine Sea	4	109.1	1	50	0.8× / 5
Cable ops · Black Seasurge	4	95	3	75	2.9× / 1.4
Cable ops · Gulf of Guineasurge	4	67.4	3	68	2.9× / 1.4
Missiles · South Atlantic Oceansurge	4	32.2	0	—	3.3× / 1.2
Nav aids · Coral Sea	4	25.1	0	—	1.3× / 3.2
Missiles · North Atlantic Oceansurge	4	20.1	0	—	4.0× / 1
Derelicts · Indian Oceansurge	4	9.1	0	—	2.2× / 1.8
Surveys · South Atlantic Ocean	3	159.2	5	139	1.3× / 2.4
Exercises · South China Sea	3	104.1	3	49	1.0× / 3
Cable ops · Bay of Bengal	3	97	4	39	1.5× / 2
Nav aids · North Pacific Oceanlong running	3	94.9	2	565	1.3× / 2.4
Other · North Atlantic Oceansurge	3	83.4	4	102	3.0× / 1
Exercises · North Atlantic Ocean	3	45	1	92	0.5× / 5.8
Cable ops · North Sea	3	36	2	27	1.5× / 2
Derelicts · South Pacific Oceansurge	3	34.9	1	156	3.8× / 0.8
Incidents · Arabian Seasurge	3	22.4	3	12	3.8× / 0.8
Incidents · South Atlantic Ocean	3	22	0	—	0.6× / 5.2
Cable ops · Ionian Seanew	3	17.2	1	17	new / 0
Missiles · Philippine Seanew	3	10.6	1	26	new / 0
Exercises · South Pacific Ocean	3	10.4	0	—	0.7× / 4.4
Incidents · Coral Sea	3	10.1	0	—	1.1× / 2.8
Quakes · Solomon Sea	3	9	0	—	1.5× / 2
Icebergs · South Atlantic Ocean	3	9	0	—	0.9× / 3.4
Debris · South Pacific Oceansurge	3	6	0	—	15× / 0.2
Cable ops · South China Sea	2	166.5	5	131	1.0× / 2
Nav aids · English Channel	2	140.2	5	239	0.8× / 2.6
Cable ops · Persian Gulf	2	104.2	4	316	3.3× / 0.6
Nav aids · Irish Sea and St. George's Channel	2	67.5	2	72	0.5× / 4
Incidents · Caribbean Sea	2	65.1	3	34	3.3× / 0.6
Cable ops · Irish Sea and St. George's Channel	2	50.7	1	29	10× / 0.2
Surveys · Mediterranean Sea - Eastern Basin	2	49.2	1	181	2.0× / 1
Other · Mediterranean Sea - Eastern Basin	2	21.6	1	21	2.5× / 0.8
Incidents · Gulf of Aden	2	19.7	1	19	10× / 0.2
Incidents · Laccadive Sea	2	15.3	1	28	10× / 0.2
Missiles · South Pacific Ocean	2	11.9	0	—	10× / 0.2
Surveys · Balearic (Iberian Sea)new	2	11.7	1	11	new / 0
Incidents · Philippine Sea	2	9.8	0	—	0.4× / 4.6
Exercises · Indian Ocean	2	9	1	18	2.0× / 1
Quakes · Celebes Sea	2	6	0	—	3.3× / 0.6
Quakes · Bismarck Sea	2	4.5	1	15	1.7× / 1.2
Exercises · Baltic Sea	2	3.8	1	11	1.3× / 1.6
Incidents · Arafura Sea	2	1.3	0	—	5.0× / 0.4
Wrecks · South Atlantic Oceanlong running	1	120	4	933	1.3× / 0.8
Ordnance · North Sealong running	1	88.9	2	1,491	2.5× / 0.4
Cable ops · Eastern China Sea	1	67	2	101	2.5× / 0.4
Surveys · North Pacific Ocean	1	55.6	2	119	1.7× / 0.6
Cable ops · Gulf of Mexico	1	52.1	2	58	0.7× / 1.4
Surveys · North Atlantic Ocean	1	39.3	1	80	5.0× / 0.2
Missiles · Aegean Sea	1	35.6	1	335	new / 0
Restricted · Black Sea	1	34.3	2	106	new / 0
Incidents · Tyrrhenian Sea	1	32.9	2	320	new / 0
Exercises · Ionian Sea	1	31.5	1	335	5.0× / 0.2
Wrecks · English Channel	1	30	1	109	5.0× / 0.2
Cable ops · Indian Ocean	1	27.3	1	60	5.0× / 0.2
Other · Black Sea	1	25.7	0	—	new / 0
Cable ops · Andaman or Burma Sea	1	22.4	1	22	1.7× / 0.6
Incidents · Bay of Bengal	1	19.5	0	—	2.5× / 0.4
Spills · Bering Sea	1	14	0	—	2.5× / 0.4
Spills · Gulf of Mexico	1	14	0	—	0.2× / 4.4
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	14	0	—	2.5× / 0.4
Incidents · Gulf of Mexico	1	12	1	44	2.5× / 0.4
Cable ops · Alboran Sea	1	10.3	1	10	new / 0
Cable ops · Caribbean Sea	1	9.9	0	—	1.7× / 0.6
Piracy · Red Sea	1	9.1	0	—	5.0× / 0.2
Incidents · Adriatic Sea	1	8.3	0	—	5.0× / 0.2
Nav aids · Caribbean Sea	1	7.1	1	7	5.0× / 0.2
Incidents · Sulu Sea	1	6.8	0	—	new / 0
Exercises · Bering Sea	1	6.1	0	—	1.3× / 0.8
Missiles · Davis Strait	1	5.6	1	5	new / 0
Surveys · Philippine Sea	1	5.5	0	—	5.0× / 0.2
Missiles · Laccadive Sea	1	5.4	0	—	5.0× / 0.2
Nav aids · Laccadive Sea	1	5.3	0	—	2.5× / 0.4
Wrecks · Sea of Azov	1	5	0	—	new / 0
Cable ops · Adriatic Sea	1	4.8	0	—	5.0× / 0.2
Derelicts · North Atlantic Ocean	1	4.7	0	—	0.2× / 5
Exercises · Laccadive Sea	1	4.5	1	4	0.2× / 4.2
Piracy · South China Sea	1	3.7	0	—	1.0× / 1
Incidents · Mozambique Channel	1	3.5	1	3	2.5× / 0.4
Incidents · Molukka Sea	1	3.3	0	—	new / 0
Exercises · Alboran Sea	1	3	0	—	new / 0
Derelicts · Arabian Sea	1	3	0	—	1.3× / 0.8
Quakes · Arabian Sea	1	3	0	—	5.0× / 0.2
Quakes · Bering Sea	1	3	0	—	5.0× / 0.2
Quakes · Ceram Sea	1	3	0	—	5.0× / 0.2
Quakes · Coral Sea	1	3	0	—	0.4× / 2.6
Quakes · Gulf of Alaska	1	3	0	—	new / 0
Derelicts · Gulf of Mexico	1	3	0	—	5.0× / 0.2
Piracy · Indian Ocean	1	3	0	—	0.1× / 9.6
Quakes · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Quakes · Philippine Sea	1	3	0	—	0.6× / 1.8
Derelicts · Sea of Azov	1	3	0	—	new / 0
Derelicts · South Atlantic Ocean	1	3	0	—	0.8× / 1.2
Quakes · Sulu Sea	1	3	0	—	new / 0
Debris · Timor Sea	1	3	0	—	5.0× / 0.2
Quakes · Banda Sea	1	2.9	1	32	0.8× / 1.2
Other · Gulf of Mexico	1	2.6	1	30	2.5× / 0.4
Piracy · Arabian Sea	1	2.5	1	2	0.1× / 8
Ordnance · Arabian Sea	1	2.1	0	—	new / 0
Missiles · Bay of Bengal	1	1.9	0	—	2.5× / 0.4
Nav aids · Bay of Bengal	1	1.8	0	—	1.0× / 1
Nav aids · Bass Strait	1	1.5	0	—	new / 0
Debris · Indian Ocean	1	1.2	1	1	1.3× / 0.8
Icebergs · Labrador Sea	1	1.1	1	31	5.0× / 0.2
Exercises · Black Sea	1	1	0	—	new / 0
Wrecks · Celtic Sea	1	0.9	0	—	new / 0
Nav aids · Great Australian Bight	1	0.8	0	—	0.6× / 1.6
Incidents · Davis Strait	1	0.5	0	—	2.5× / 0.4
Ordnance · Mediterranean Sea - Eastern Basin	1	0.4	1	0	new / 0
Incidents · Great Australian Bight	1	0.3	0	—	2.5× / 0.4
Nav aids · Indian Ocean	1	0.3	0	—	1.0× / 1
Incidents · Bass Strait	1	0.2	0	—	1.7× / 0.6
Nav aids · Arafura Sea	1	0.1	0	—	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	0.1	0	—	0.5× / 2
Incidents · Timor Sea	1	0.1	0	—	2.5× / 0.4
Surveys · Arctic Oceanlong running	0	407.4	13	882	— / 0
Surveys · Beaufort Sealong running	0	180	6	842	— / 0
Nav aids · Arabian Sealong running	0	173.1	5	847	— / 0
Restricted · North Sealong running	0	71.6	2	466	0.0× / 0.2
Nav aids · South Pacific Ocean	0	67.7	2	148	0.0× / 0.8
Nav aids · Celtic Sea	0	60	2	56	0.0× / 3
War risk · Mediterranean Sea - Eastern Basinlong running	0	60	2	555	— / 0
Wrecks · North Atlantic Oceanlong running	0	60	2	469	— / 0
Other · North Pacific Ocean	0	60	2	228	0.0× / 0.8
Wrecks · North Sealong running	0	60	2	424	0.0× / 0.6
Other · Persian Gulflong running	0	60	2	446	0.0× / 0.2
Nav aids · Sea of Okhotsk	0	60	2	346	— / 0
Nav aids · South China Sealong running	0	60	2	473	— / 0
Wrecks · South China Sea	0	60	2	295	0.0× / 0.2
Surveys · The Northwestern Passages	0	60	2	116	— / 0
Wrecks · The Northwestern Passageslong running	0	60	2	817	0.0× / 0.2
Surveys · Baffin Bay	0	34.8	0	—	— / 0
Incidents · Andaman or Burma Sea	0	30	1	35	0.0× / 0.2
Wrecks · Arabian Sea	0	30	1	89	0.0× / 0.4
Surveys · Barentsz Sea	0	30	1	102	— / 0
Restricted · Bay of Bengal	0	30	1	90	— / 0
Surveys · Bay of Bengal	0	30	1	37	0.0× / 0.2
Surveys · Bering Sea	0	30	1	123	— / 0
Nav aids · Bristol Channel	0	30	1	296	0.0× / 0.6
Nav aids · Eastern China Sea	0	30	1	290	— / 0
Nav aids · Gulf of California	0	30	1	55	0.0× / 2.2
Derelicts · Gulf of Oman	0	30	1	333	— / 0
Wrecks · Irish Sea and St. George's Channel	0	30	1	162	0.0× / 0.2
Nav aids · Kara Sealong running	0	30	1	450	— / 0
Other · Kara Sea	0	30	1	142	— / 0
Nav aids · Mediterranean Sea - Western Basinlong running	0	30	1	469	0.0× / 0.6
Surveys · Mediterranean Sea - Western Basin	0	30	1	50	0.0× / 0.2
Restricted · North Atlantic Ocean	0	30	1	165	0.0× / 0.2
Other · North Sea	0	30	1	79	0.0× / 0.8
Structures · North Sealong running	0	30	1	473	— / 0
Nav aids · Persian Gulf	0	30	1	35	0.0× / 0.8
Restricted · Persian Gulflong running	0	30	1	729	— / 0
Wrecks · Persian Gulf	0	30	1	87	0.0× / 0.2
Volcanic · Philippine Sea	0	30	1	215	— / 0
Wrecks · Philippine Sea	0	30	1	200	— / 0
Surveys · Sea of Marmara	0	30	1	78	— / 0
Restricted · Sea of Okhotsklong running	0	30	1	414	— / 0
Spills · South Atlantic Oceanlong running	0	30	1	385	0.0× / 0.2
Restricted · South Atlantic Ocean	0	30	1	294	— / 0
Surveys · Yellow Sea	0	30	1	127	— / 0
Wrecks · Yellow Sea	0	30	1	347	— / 0
Other · Southern Ocean	0	28.5	0	—	0.0× / 0.2
Surveys · Indian Ocean	0	23.5	0	—	0.0× / 0.2
Other · Barentsz Sea	0	18.7	0	—	— / 0
Other · The Northwestern Passages	0	17.4	0	—	— / 0
Cable ops · Gulf of Thailand	0	16.5	0	—	— / 0
Other · Indian Ocean	0	14.1	0	—	0.0× / 0.4
Cable ops · Beaufort Sea	0	14	0	—	— / 0
Spills · North Atlantic Ocean	0	13	0	—	0.0× / 2.4
Surveys · Sea of Okhotsk	0	10.4	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2012-11, 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.