Sea Ledger, December 2013

2013-12-01 to 2013-12-31 · archive

issued: 551
warning-days in force: 9,048
in force at month end: 290
sea × type cells: 221

baseline: same month, previous 5 years (2012-12, 2011-12, 2010-12, 2009-12, 2008-12)

By type

type	issued	warning-days	in force at end
Incidents	154	993	38
Cable ops	83	1,204.2	47
Exercises	71	737	12
Nav aids	54	2,449.4	81
Derelicts	34	140.8	5
Quakes	30	86.6	3
Missiles	26	156	5
Icebergs	26	39.7	3
Surveys	23	1,162	29
Other	14	474	19
Spills	10	159	5
Debris	6	20.7	0
Wrecks	5	784.5	23
Volcanic	4	62	2
Ordnance	3	161.8	6
Containers	3	6.9	0
Piracy	3	13.2	0
Structures	1	141.1	4
Storms	1	2.1	0
Restricted	0	160.6	5
Mines	0	31	1
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
Cable ops · South Atlantic Ocean	50	236.8	9	75	1.5× / 33.8
Incidents · South China Seasurge	29	142.4	6	42	3.1× / 9.4
Incidents · North Pacific Ocean	28	95.6	4	30	1.6× / 17.4
Incidents · North Atlantic Ocean	25	255.2	11	56	1.9× / 12.8
Icebergs · Labrador Seasurge	18	19.3	1	32	3.3× / 5.4
Nav aids · North Sealong running	17	375.3	10	395	1.0× / 17.4
Exercises · Yellow Sea	12	112.9	3	34	1.9× / 6.4
Exercises · South Atlantic Ocean	11	88.6	1	32	1.3× / 8.2
Incidents · Caribbean Seasurge	10	89	3	57	4.5× / 2.2
Exercises · Arabian Sea	10	65.6	2	35	1.9× / 5.4
Incidents · Mediterranean Sea - Eastern Basinsurge	10	49.4	0	—	4.5× / 2.2
Derelicts · South China Seasurge	10	46.8	2	32	5.0× / 2
Exercises · North Pacific Ocean	9	80.4	1	39	0.8× / 11.6
Incidents · South Pacific Ocean	9	43.2	2	25	1.1× / 7.8
Nav aids · North Atlantic Ocean	8	198.2	7	272	1.1× / 7
Nav aids · Inner Seas off the West Coast of Scotland	8	77.6	3	180	1.7× / 4.6
Missiles · North Pacific Ocean	8	58.1	1	60	1.7× / 4.8
Quakes · North Pacific Ocean	8	24	0	—	1.6× / 5
Quakes · South Pacific Ocean	8	24	0	—	0.8× / 9.6
Icebergs · South Atlantic Oceansurge	8	20.4	2	10	2.0× / 4
Incidents · South Atlantic Oceansurge	7	46.3	1	35	2.1× / 3.4
Missiles · Barentsz Seasurge	6	26.4	0	—	3.8× / 1.6
Surveys · Adriatic Seanew	6	18.6	0	—	new / 0
Derelicts · North Atlantic Ocean	6	17.1	1	30	1.8× / 3.4
Missiles · North Atlantic Oceansurge	6	15.5	1	32	4.3× / 1.4
Surveys · Mediterranean Sea - Eastern Basinsurge	5	87.6	1	120	5.0× / 1
Exercises · Black Seasurge	5	39.9	0	—	8.3× / 0.6
Incidents · Philippine Seasurge	5	12.2	1	29	2.5× / 2
Nav aids · South Atlantic Oceanlong running	4	384.8	13	1,014	0.7× / 6.2
Surveys · South Atlantic Ocean	4	214	6	342	1.2× / 3.4
Cable ops · Gulf of Mexicosurge	4	116.2	5	47	6.7× / 0.6
Volcanic · Philippine Seanewlong running	4	62	2	611	new / 0
Exercises · Bay of Bengal	4	59.6	1	37	0.5× / 7.8
Cable ops · Mediterranean Sea - Eastern Basin	4	51.6	1	48	1.3× / 3
Derelicts · South Pacific Oceansurgelong running	4	38.3	1	552	4.0× / 1
Nav aids · Irish Sea and St. George's Channelsurge	4	37.2	1	35	2.0× / 2
Exercises · Indian Oceansurge	4	16.4	0	—	6.7× / 0.6
Quakes · Indian Ocean	4	12	0	—	1.4× / 2.8
Cable ops · South China Seasurge	3	163.9	6	134	2.1× / 1.4
Other · South China Seasurge	3	74	4	132	15× / 0.2
Nav aids · South Pacific Oceansurge	3	66.3	2	64	3.8× / 0.8
Exercises · South China Sea	3	41.7	2	33	0.9× / 3.2
Spills · North Atlantic Oceansurge	3	40	1	27	5.0× / 0.6
Other · North Atlantic Oceansurge	3	34.1	2	50	7.5× / 0.4
Spills · Gulf of Mexico	3	33	2	40	1.5× / 2
Surveys · Indian Oceansurge	3	22.6	1	22	7.5× / 0.4
Incidents · Indian Ocean	3	18	1	30	0.4× / 8
Piracy · Gulf of Adensurge	3	13.2	0	—	2.5× / 1.2
Debris · South Pacific Oceansurge	3	9	0	—	15× / 0.2
Containers · North Atlantic Oceansurge	3	6.9	0	—	15× / 0.2
Incidents · Coral Sea	3	1.2	0	—	0.7× / 4.4
Cable ops · Gulf of Guinea	2	122.6	4	37	1.0× / 2
Exercises · Aegean Sea	2	100.6	1	363	0.5× / 3.8
Nav aids · North Pacific Oceanlong running	2	96.1	3	390	0.8× / 2.4
Cable ops · Mozambique Channelnew	2	85	4	62	new / 0
Nav aids · Indian Ocean	2	63.9	4	194	2.5× / 0.8
Incidents · Bay of Bengal	2	57.5	2	31	1.4× / 1.4
Cable ops · Indian Ocean	2	43.3	2	37	2.0× / 1
Exercises · Philippine Sea	2	37.5	0	—	0.6× / 3.6
Incidents · Tyrrhenian Sealong running	2	37.1	1	716	10× / 0.2
Cable ops · North Atlantic Ocean	2	33.7	1	115	0.5× / 4.2
Spills · Bering Sea	2	28	0	—	3.3× / 0.6
Incidents · Laccadive Sea	2	27.6	2	53	3.3× / 0.6
Other · Black Seanew	2	27.3	1	27	new / 0
Spills · North Pacific Ocean	2	27	1	17	5.0× / 0.4
Cable ops · Caribbean Sea	2	24	1	21	2.0× / 1
Cable ops · Arabian Sea	2	20.5	1	20	0.6× / 3.4
Other · Caribbean Sea	2	17.7	1	11	3.3× / 0.6
Incidents · Adriatic Seanew	2	15.7	0	—	new / 0
Incidents · Mediterranean Sea - Western Basin	2	11.3	1	25	10× / 0.2
Exercises · North Atlantic Ocean	2	10.1	0	—	0.4× / 5
Incidents · Japan Sea	2	8.5	2	7	5.0× / 0.4
Missiles · South Atlantic Ocean	2	8.2	0	—	2.0× / 1
Incidents · Bismarck Sea	2	7.9	0	—	3.3× / 0.6
Missiles · Laccadive Sea	2	6.6	1	18	2.5× / 0.8
Incidents · Ionian Seanew	2	6.5	0	—	new / 0
Quakes · Banda Sea	2	6	0	—	1.4× / 1.4
Derelicts · Bay of Bengal	2	6	0	—	10× / 0.2
Derelicts · Indian Ocean	2	6	0	—	0.9× / 2.2
Quakes · Philippine Sea	2	6	0	—	1.0× / 2
Exercises · Baltic Sea	2	5.6	0	—	2.0× / 1
Derelicts · North Pacific Ocean	2	4.5	1	4	1.4× / 1.4
Derelicts · South Atlantic Ocean	2	3.6	0	—	1.7× / 1.2
Incidents · Arafura Sea	2	0.2	0	—	3.3× / 0.6
Nav aids · Gulf of Mexicolong running	1	191	7	784	0.4× / 2.8
Wrecks · Persian Gulflong running	1	115.9	4	483	1.3× / 0.8
Other · South Atlantic Ocean	1	101.1	4	57	1.7× / 0.6
Nav aids · Caribbean Sealong running	1	99.9	3	403	new / 0
Wrecks · South Atlantic Oceanlong running	1	97.3	1	493	5.0× / 0.2
Nav aids · English Channellong running	1	95.2	3	635	0.5× / 2
Surveys · Arabian Sea	1	74.2	2	362	1.7× / 0.6
Cable ops · Persian Gulf	1	69.5	2	111	5.0× / 0.2
Cable ops · Sulu Sea	1	53.6	2	43	5.0× / 0.2
Ordnance · North Sealong running	1	52.4	2	769	5.0× / 0.2
Ordnance · Black Sea	1	42.7	2	186	new / 0
Cable ops · North Sea	1	33.7	2	37	0.6× / 1.8
Exercises · Laccadive Sea	1	32.1	1	33	0.5× / 2.2
Cable ops · North Pacific Ocean	1	26.6	0	—	2.5× / 0.4
Wrecks · English Channel	1	26.4	1	26	5.0× / 0.2
Surveys · Black Sea	1	25.6	1	25	1.7× / 0.6
Nav aids · Mediterranean Sea - Eastern Basin	1	25.6	1	25	1.7× / 0.6
Cable ops · South Pacific Ocean	1	22.1	1	22	5.0× / 0.2
Surveys · Bay of Bengal	1	21.6	1	21	5.0× / 0.2
Structures · Gulf of Suez	1	21.1	1	21	new / 0
Nav aids · Coral Sea	1	19.6	1	19	0.3× / 3.2
Cable ops · Eastern China Sea	1	12.6	1	12	1.7× / 0.6
Cable ops · Andaman or Burma Sea	1	9.5	1	9	1.7× / 0.6
Incidents · Celtic Sea	1	8.3	1	8	5.0× / 0.2
Exercises · Mediterranean Sea - Eastern Basin	1	7.9	0	—	0.3× / 3
Incidents · Southern Ocean	1	7	0	—	1.3× / 0.8
Cable ops · Balearic (Iberian Sea)	1	6.7	0	—	new / 0
Incidents · Balearic (Iberian Sea)	1	6.5	0	—	new / 0
Cable ops · Philippine Sea	1	6.4	1	6	new / 0
Missiles · Arctic Ocean	1	5.7	0	—	2.5× / 0.4
Surveys · North Sea	1	5.6	0	—	2.5× / 0.4
Derelicts · Gulf of Mexico	1	5.1	0	—	1.0× / 1
Ordnance · Aegean Sea	1	4.7	0	—	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	4.1	0	—	0.6× / 1.8
Cable ops · Java Sea	1	3.9	1	3	1.0× / 1
Incidents · Andaman or Burma Sea	1	3.7	0	—	1.7× / 0.6
Derelicts · Coral Sea	1	3.6	0	—	2.5× / 0.4
Incidents · Arabian Sea	1	3	0	—	0.8× / 1.2
Debris · Indian Ocean	1	3	0	—	1.7× / 0.6
Derelicts · Japan Sea	1	3	0	—	new / 0
Quakes · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Wrecks · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Derelicts · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Debris · North Pacific Ocean	1	3	0	—	1.7× / 0.6
Derelicts · Philippine Sea	1	3	0	—	2.5× / 0.4
Debris · South Atlantic Ocean	1	3	0	—	2.5× / 0.4
Quakes · South Atlantic Ocean	1	3	0	—	0.7× / 1.4
Quakes · Tasman Sea	1	3	0	—	new / 0
Other · Mediterranean Sea - Western Basin	1	2.9	0	—	new / 0
Quakes · Solomon Sea	1	2.5	1	2	1.0× / 1
Quakes · Molukka Sea	1	2.3	1	2	1.3× / 0.8
Storms · Indian Ocean	1	2.1	0	—	new / 0
Missiles · Bay of Bengal	1	1.5	1	1	2.5× / 0.4
Exercises · Alboran Sea	1	1.2	0	—	new / 0
Exercises · Bering Sea	1	1.1	0	—	new / 0
Surveys · Gulf of California	1	1.1	1	1	new / 0
Wrecks · Gulf of California	1	1.1	1	1	new / 0
Exercises · Coral Sea	1	1	0	—	1.3× / 0.8
Derelicts · Flores Sea	1	0.8	0	—	new / 0
Incidents · Aegean Sea	1	0.5	0	—	new / 0
Other · Flores Sea	1	0.5	1	0	new / 0
Quakes · South China Sea	1	0.2	1	0	new / 0
Incidents · Davis Strait	1	0.1	0	—	2.5× / 0.4
Other · Timor Sea	1	0	0	—	new / 0
Surveys · Arctic Oceanlong running	0	155.8	5	1,163	— / 0
Surveys · Beaufort Sealong running	0	124	4	1,238	— / 0
Wrecks · The Northwestern Passageslong running	0	124	4	1,213	— / 0
Nav aids · Arabian Sealong running	0	93	3	935	0.0× / 1
Nav aids · Gulf of California	0	93	3	230	0.0× / 0.2
Nav aids · South China Sealong running	0	93	3	869	— / 0
Surveys · The Northwestern Passageslong running	0	93	3	512	— / 0
Wrecks · Arabian Sea	0	62	2	257	0.0× / 1
Nav aids · Kara Sealong running	0	62	2	846	0.0× / 0.2
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	951	— / 0
Other · North Pacific Oceanlong running	0	62	2	624	0.0× / 0.8
Other · North Sealong running	0	62	2	475	0.0× / 1.4
Restricted · North Sealong running	0	62	2	862	0.0× / 0.2
Structures · North Sealong running	0	62	2	869	— / 0
Wrecks · North Sea	0	62	2	295	0.0× / 0.6
Nav aids · Sea of Okhotsklong running	0	62	2	742	0.0× / 0.4
Nav aids · Southern Ocean	0	62	2	39	0.0× / 0.2
Surveys · Gulf of Mexico	0	45	0	—	0.0× / 0.2
Surveys · Andaman or Burma Sea	0	36	1	33	0.0× / 0.4
Surveys · Gulf of Suez	0	35	0	—	0.0× / 0.2
Missiles · Aegean Sea	0	34	1	363	0.0× / 0.4
Incidents · Gulf of Thailand	0	32.5	0	—	0.0× / 0.2
Other · Adriatic Sea	0	31	1	57	0.0× / 0.2
Wrecks · Arctic Ocean	0	31	1	130	— / 0
Wrecks · Barentsz Sea	0	31	1	75	— / 0
Nav aids · Bass Strait	0	31	1	274	— / 0
Wrecks · Bay of Bengal	0	31	1	154	0.0× / 0.2
Surveys · Bering Sea	0	31	1	158	— / 0
Cable ops · Black Sea	0	31	1	125	0.0× / 1.2
Mines · Black Sea	0	31	1	186	— / 0
Restricted · Black Sea	0	31	1	209	— / 0
Nav aids · Celtic Sealong running	0	31	1	432	0.0× / 3.2
Surveys · Chukchi Sealong running	0	31	1	393	0.0× / 0.4
Surveys · Coral Sea	0	31	1	69	— / 0
Wrecks · Coral Sea	0	31	1	34	— / 0
Nav aids · Eastern China Sealong running	0	31	1	686	— / 0
Wrecks · Eastern China Sea	0	31	1	60	— / 0
Other · Gulf of Mexico	0	31	1	235	— / 0
Ordnance · Inner Seas off the West Coast of Scotland	0	31	1	207	— / 0
Cable ops · Kara Sea	0	31	1	38	— / 0
Nav aids · Laccadive Sea	0	31	1	249	0.0× / 0.6
Restricted · Mediterranean Sea - Eastern Basin	0	31	1	35	— / 0
Nav aids · Mediterranean Sea - Western Basin	0	31	1	40	0.0× / 0.2
Nav aids · Mozambique Channel	0	31	1	81	— / 0
Structures · North Atlantic Ocean	0	31	1	133	— / 0
Wrecks · North Atlantic Oceanlong running	0	31	1	815	— / 0
Nav aids · Persian Gulf	0	31	1	174	0.0× / 0.2
Wrecks · Philippine Sea	0	31	1	46	0.0× / 0.2
Ordnance · Sea of Azov	0	31	1	67	— / 0
Restricted · Sea of Okhotsklong running	0	31	1	810	— / 0
Nav aids · Singapore Strait	0	31	1	155	0.0× / 0.2
Spills · South Atlantic Oceanlong running	0	31	1	781	— / 0

Cite: seahazards.com Sea Ledger, 2013-12, 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.