Sea Ledger, October 2013

2013-10-01 to 2013-10-31 · archive

issued: 648
warning-days in force: 10,190
in force at month end: 316
sea × type cells: 235

baseline: same month, previous 5 years (2012-10, 2011-10, 2010-10, 2009-10, 2008-10)

By type

type	issued	warning-days	in force at end
Incidents	151	994.9	31
Cable ops	109	1,560.5	45
Exercises	96	1,006.9	25
Nav aids	74	2,592.7	78
Surveys	46	1,415	48
Icebergs	38	52	3
Quakes	32	92.9	5
Derelicts	28	103.2	3
Missiles	24	219.6	7
Other	17	539.8	13
Spills	12	184	10
Debris	6	17.9	0
Wrecks	5	843.2	28
Piracy	4	16.4	2
Containers	3	9	0
Ordnance	2	113.1	5
Restricted	1	188.3	6
Mines	0	31	1
War risk	0	62	2
Structures	0	93	3
Towing	0	23.7	0
Volcanic	0	31	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceansurge	59	245.2	11	98	3.2× / 18.4
Incidents · North Pacific Ocean	32	109.4	8	34	1.8× / 17.8
Icebergs · Labrador Seasurge	31	33.7	2	32	5.0× / 6.2
Incidents · South China Seasurge	26	169.9	2	46	4.1× / 6.4
Exercises · Yellow Seasurge	15	111.5	6	34	2.1× / 7
Incidents · Mediterranean Sea - Eastern Basinsurge	15	81.7	5	36	5.8× / 2.6
Exercises · North Pacific Ocean	14	52.3	2	92	1.0× / 13.8
Nav aids · North Sea	13	435.3	12	334	1.1× / 12
Nav aids · South Atlantic Oceanlong running	10	583.2	16	1,898	1.4× / 7.4
Incidents · North Atlantic Ocean	10	157.9	2	54	1.0× / 10
Incidents · South Atlantic Ocean	10	79.9	1	114	1.6× / 6.2
Exercises · Black Seasurge	10	55.6	4	35	7.1× / 1.4
Nav aids · Indian Oceansurge	10	39.4	2	133	8.3× / 1.2
Quakes · South Pacific Ocean	10	27.5	3	33	0.8× / 12.6
Exercises · South Atlantic Ocean	9	89.7	0	—	0.7× / 12.6
Incidents · South Pacific Ocean	9	66.3	1	42	1.0× / 8.8
Cable ops · South China Seasurge	8	289.5	8	111	3.1× / 2.6
Nav aids · North Atlantic Oceanlong running	8	270.9	6	397	1.1× / 7.2
Exercises · Philippine Sea	8	204.7	2	35	1.5× / 5.2
Surveys · Adriatic Seanew	8	20.2	1	31	new / 0
Surveys · South Atlantic Oceansurge	7	258.7	8	281	2.1× / 3.4
Cable ops · North Atlantic Ocean	7	101	4	117	1.0× / 7
Exercises · Bay of Bengal	7	84.9	1	38	0.9× / 8
Exercises · South Pacific Oceansurge	7	44.2	0	—	2.2× / 3.2
Exercises · South China Sea	6	112.2	3	34	0.9× / 6.6
Spills · Gulf of Mexico	6	55	5	43	1.4× / 4.4
Incidents · Davis Straitsurge	6	47	2	26	6.0× / 1
Incidents · Coral Sea	6	36.4	1	31	1.2× / 5
Incidents · Philippine Sea	6	26.5	2	20	1.8× / 3.4
Icebergs · South Atlantic Ocean	6	15.3	1	30	1.4× / 4.2
Nav aids · Great Australian Bightsurge	6	2.9	0	—	30× / 0.2
Surveys · Arctic Oceansurgelong running	5	256.2	9	1,102	4.2× / 1.2
Cable ops · North Seasurge	5	163.3	5	102	2.1× / 2.4
Missiles · North Pacific Ocean	5	65.9	1	60	0.7× / 7.4
Exercises · Arabian Sea	5	55.9	1	36	0.8× / 6.4
Derelicts · South China Seasurge	5	13.3	0	—	4.2× / 1.2
Quakes · Philippine Seasurge	5	12.5	1	25	2.8× / 1.8
Cable ops · Arctic Oceannew	5	12.4	0	—	new / 0
Exercises · Coral Seasurge	5	11.3	2	25	2.8× / 1.8
Incidents · Indian Ocean	5	8.4	0	—	1.0× / 5
Derelicts · North Pacific Ocean	5	8	0	—	1.9× / 2.6
Exercises · Aegean Seasurge	4	100.9	2	302	2.5× / 1.6
Cable ops · Laptev Seasurge	4	48.5	0	—	20× / 0.2
Nav aids · Inner Seas off the West Coast of Scotland	4	37.7	1	119	1.1× / 3.6
Missiles · South Pacific Oceansurge	4	12.3	2	8	2.9× / 1.4
Nav aids · English Channellong running	3	126.7	4	574	0.9× / 3.4
Nav aids · North Pacific Ocean	3	74.4	4	329	1.4× / 2.2
Cable ops · Norwegian Seasurge	3	55.1	0	—	15× / 0.2
Nav aids · The Northwestern Passagessurge	3	41.6	0	—	15× / 0.2
Incidents · Gulf of Mexico	3	33.4	1	28	1.7× / 1.8
Missiles · South Atlantic Oceansurge	3	29.9	2	14	3.8× / 0.8
Missiles · Black Seasurge	3	21.4	1	35	15× / 0.2
Other · Mediterranean Sea - Eastern Basinsurge	3	14.4	0	—	5.0× / 0.6
Derelicts · North Atlantic Ocean	3	13.9	2	31	1.3× / 2.4
Cable ops · Ionian Seanew	3	11.9	0	—	new / 0
Quakes · Indian Ocean	3	9	0	—	1.1× / 2.6
Quakes · North Pacific Ocean	3	9	0	—	0.4× / 6.8
Surveys · Tasman Seanew	3	7.8	0	—	new / 0
Derelicts · Timor Seasurge	3	6.9	0	—	15× / 0.2
Incidents · The Northwestern Passagesnew	3	0.3	0	—	new / 0
Nav aids · Gulf of Mexicolong running	2	188.6	6	723	0.5× / 4.2
Cable ops · Gulf of Mexico	2	88.3	2	80	1.4× / 1.4
Surveys · Gulf of Mexiconew	2	77.1	3	42	new / 0
Cable ops · Black Sea	2	71	1	64	1.4× / 1.4
Surveys · Mediterranean Sea - Eastern Basin	2	59.8	2	59	2.0× / 1
Surveys · Hudson Straitnew	2	48.4	0	—	new / 0
Wrecks · Bay of Bengalnew	2	45.3	2	93	new / 0
Surveys · North Atlantic Ocean	2	40.4	1	89	2.0× / 1
Surveys · Black Sea	2	36.4	2	66	2.5× / 0.8
Surveys · North Pacific Oceannew	2	31.4	1	33	new / 0
Other · Caribbean Seanew	2	25.7	1	16	new / 0
Spills · The Coastal Waters of Southeast Alaska and British Columbia	2	24	1	30	10× / 0.2
Spills · North Atlantic Ocean	2	20	1	22	1.3× / 1.6
Missiles · Barentsz Sea	2	17.1	0	—	1.1× / 1.8
Incidents · Ionian Sea	2	16	0	—	2.5× / 0.8
Missiles · Arctic Ocean	2	13.3	0	—	10× / 0.2
Incidents · Caribbean Sea	2	8.3	0	—	1.0× / 2
Other · North Atlantic Ocean	2	7.4	0	—	1.0× / 2
Nav aids · South Pacific Ocean	2	7.3	1	14	1.4× / 1.4
Missiles · Bay of Bengal	2	6.4	0	—	10× / 0.2
Cable ops · Chukchi Seanew	2	6.4	0	—	new / 0
Piracy · Indian Ocean	2	6.1	0	—	0.2× / 8.4
Derelicts · Bering Seanew	2	6	0	—	new / 0
Containers · North Pacific Ocean	2	6	0	—	2.5× / 0.8
Quakes · Solomon Sea	2	6	0	—	1.3× / 1.6
Quakes · South Atlantic Ocean	2	6	0	—	5.0× / 0.4
Incidents · Solomon Sea	2	5.3	0	—	5.0× / 0.4
Incidents · Bismarck Sea	2	5.2	0	—	3.3× / 0.6
Other · Tasman Sea	2	3.8	0	—	10× / 0.2
Incidents · Bering Sea	2	3.6	0	—	10× / 0.2
Derelicts · South Atlantic Ocean	2	3.1	0	—	5.0× / 0.4
Derelicts · Arafura Sea	2	3	0	—	10× / 0.2
Incidents · Timor Sea	2	0.7	0	—	2.5× / 0.8
Wrecks · South Atlantic Oceanlong running	1	161.2	5	1,268	2.5× / 0.4
Surveys · Beaufort Sealong running	1	130.2	4	1,177	0.8× / 1.2
Other · North Sealong running	1	124	4	414	0.5× / 2
Nav aids · Caribbean Sea	1	110.1	4	342	5.0× / 0.2
Other · South China Sea	1	87.6	2	129	5.0× / 0.2
Cable ops · Kara Sea	1	84.1	2	97	new / 0
Cable ops · Caribbean Sea	1	74.8	2	77	1.7× / 0.6
Cable ops · Mediterranean Sea - Eastern Basin	1	65.4	1	56	0.5× / 2
Cable ops · Mozambique Channel	1	63.2	3	164	new / 0
Incidents · Arabian Sea	1	62.7	1	50	2.5× / 0.4
Surveys · Gulf of Guinea	1	45.1	2	52	5.0× / 0.2
Ordnance · North Sealong running	1	44.5	2	708	1.0× / 1
Surveys · Gulf of Suez	1	40.4	1	37	5.0× / 0.2
Nav aids · Irish Sea and St. George's Channel	1	36.2	1	58	0.5× / 2.2
Exercises · Laccadive Sea	1	32.9	1	31	0.2× / 4.2
Cable ops · Persian Gulf	1	32.5	2	50	1.7× / 0.6
Nav aids · Bass Strait	1	31.5	1	213	2.5× / 0.4
Surveys · Indian Ocean	1	30.8	1	30	0.8× / 1.2
Surveys · South China Sea	1	30.4	1	64	new / 0
Wrecks · Bristol Channel	1	28.7	1	28	new / 0
Cable ops · North Pacific Ocean	1	25.6	1	25	0.8× / 1.2
Cable ops · Gulf of Guinea	1	24	1	63	0.4× / 2.4
Surveys · Coral Sea	1	23.2	1	37	new / 0
Incidents · Mozambique Channel	1	20.6	1	32	1.0× / 1
Nav aids · Mozambique Channel	1	20.4	1	20	new / 0
Other · South Atlantic Ocean	1	16.6	0	—	1.3× / 0.8
Surveys · Mediterranean Sea - Western Basin	1	16.4	1	16	2.5× / 0.4
Wrecks · Barentsz Sea	1	14.6	1	14	5.0× / 0.2
Spills · North Pacific Ocean	1	14	0	—	0.7× / 1.4
Other · Bay of Bengal	1	10.3	1	10	new / 0
Surveys · Barentsz Sea	1	10.2	1	10	new / 0
Cable ops · Arabian Sea	1	9.9	0	—	0.6× / 1.8
Other · South Pacific Ocean	1	9.2	0	—	new / 0
Spills · South Pacific Ocean	1	9	1	9	5.0× / 0.2
Incidents · Ligurian Sea	1	8.6	0	—	new / 0
Missiles · Sea of Okhotsk	1	8	0	—	1.7× / 0.6
Missiles · Laccadive Sea	1	7.2	0	—	1.3× / 0.8
Missiles · Kara Sea	1	7.1	0	—	0.8× / 1.2
Ordnance · Sea of Azov	1	6.6	1	6	5.0× / 0.2
Piracy · South China Sea	1	6	1	36	0.5× / 2
Exercises · Baltic Sea	1	5.8	0	—	0.6× / 1.8
Nav aids · Tasman Sea	1	4.8	0	—	2.5× / 0.4
Nav aids · Bay of Bengal	1	4.6	1	4	new / 0
Piracy · Red Sea	1	4.3	1	4	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	4.1	0	—	0.4× / 2.4
Incidents · Bay of Biscay	1	3.7	1	31	5.0× / 0.2
Nav aids · Gulf of Alaska	1	3.7	0	—	0.3× / 3.6
Incidents · Java Sea	1	3.7	1	3	new / 0
Exercises · Indian Ocean	1	3.5	0	—	1.0× / 1
Other · Philippine Sea	1	3.1	0	—	new / 0
Debris · Andaman or Burma Sea	1	3	0	—	new / 0
Quakes · Arabian Sea	1	3	0	—	new / 0
Quakes · Caribbean Sea	1	3	0	—	new / 0
Derelicts · Gulf of Aden	1	3	0	—	new / 0
Quakes · Gulf of California	1	3	0	—	0.8× / 1.2
Quakes · Gulf of Tomini	1	3	0	—	2.5× / 0.4
Debris · Indian Ocean	1	3	0	—	2.5× / 0.4
Derelicts · Indian Ocean	1	3	0	—	0.5× / 2
Icebergs · Indian Ocean	1	3	0	—	1.7× / 0.6
Derelicts · Kara Sea	1	3	0	—	new / 0
Derelicts · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Quakes · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Containers · North Atlantic Ocean	1	3	0	—	2.5× / 0.4
Debris · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Derelicts · Persian Gulf	1	3	0	—	new / 0
Quakes · Sea of Okhotsk	1	3	0	—	5.0× / 0.2
Debris · Tasman Sea	1	3	0	—	new / 0
Derelicts · Tasman Sea	1	3	0	—	2.5× / 0.4
Debris · Timor Sea	1	3	0	—	new / 0
Debris · Gulf of Mexico	1	2.9	0	—	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	2.7	0	—	1.0× / 1
Incidents · Laccadive Sea	1	2.6	1	2	2.5× / 0.4
Quakes · Southern Ocean	1	2.6	1	2	2.5× / 0.4
Restricted · South Atlantic Ocean	1	2.3	0	—	new / 0
Exercises · Mediterranean Sea - Eastern Basin	1	2.2	0	—	0.4× / 2.8
Exercises · Adriatic Sea	1	2	0	—	5.0× / 0.2
Surveys · Celtic Sea	1	1.9	0	—	5.0× / 0.2
Surveys · Sea of Marmara	1	1.4	0	—	new / 0
Incidents · Bay of Bengal	1	1.3	0	—	1.0× / 1
Cable ops · Greenland Sea	1	1	0	—	new / 0
Nav aids · Timor Sea	1	0.9	0	—	new / 0
Other · Arafura Sea	1	0.6	0	—	new / 0
Surveys · Mozambique Channel	1	0.6	1	0	new / 0
Exercises · Celebes Sea	1	0.3	0	—	new / 0
Other · Indian Ocean	1	0.3	0	—	1.3× / 0.8
Incidents · Bass Strait	1	0.1	0	—	new / 0
Wrecks · Persian Gulflong running	0	155	5	422	— / 0
Wrecks · The Northwestern Passageslong running	0	124	4	1,152	— / 0
Nav aids · Arabian Sealong running	0	93	3	874	0.0× / 0.6
Nav aids · Gulf of California	0	93	3	169	0.0× / 0.6
Surveys · The Northwestern Passageslong running	0	93	3	451	— / 0
Cable ops · Sea of Okhotsk	0	87.4	2	148	0.0× / 0.4
Surveys · Arabian Sea	0	62	2	301	0.0× / 0.8
Wrecks · Arabian Sea	0	62	2	196	— / 0
Nav aids · Kara Sealong running	0	62	2	785	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	890	— / 0
Other · North Pacific Oceanlong running	0	62	2	563	0.0× / 0.8
Restricted · North Sealong running	0	62	2	801	0.0× / 0.4
Structures · North Sealong running	0	62	2	808	— / 0
Wrecks · North Sea	0	62	2	234	0.0× / 0.4
Nav aids · Persian Gulf	0	62	2	113	0.0× / 0.4
Nav aids · Sea of Okhotsklong running	0	62	2	681	0.0× / 0.2
Nav aids · South China Sealong running	0	62	2	808	0.0× / 0.2
Other · Hudson Strait	0	51.8	0	—	— / 0
Other · Adriatic Sea	0	31	1	41	— / 0
Missiles · Aegean Sea	0	31	1	302	— / 0
Wrecks · Arctic Ocean	0	31	1	69	— / 0

Cite: seahazards.com Sea Ledger, 2013-10, 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.