Sea Ledger, November 2013

2013-11-01 to 2013-11-30 · archive

issued: 597
warning-days in force: 9,020
in force at month end: 288
sea × type cells: 229

baseline: same month, previous 5 years (2012-11, 2011-11, 2010-11, 2009-11, 2008-11)

By type

type	issued	warning-days	in force at end
Incidents	125	906.1	22
Exercises	109	870	26
Cable ops	88	1,042.8	39
Nav aids	65	2,304.3	81
Quakes	41	130.5	1
Icebergs	33	40.7	2
Surveys	31	1,377.3	44
Derelicts	28	117.4	3
Missiles	23	161	6
Other	16	454	14
Debris	11	25.9	1
Wrecks	8	844	27
Spills	6	158.4	2
Piracy	4	30.5	0
Ordnance	3	157.2	5
Containers	2	6	0
Volcanic	2	40.5	2
Restricted	1	172.5	6
Structures	1	91.3	4
Mines	0	30	1
War risk	0	60	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 Oceansurge	57	247.6	9	128	2.7× / 21.4
Incidents · North Pacific Ocean	29	116.9	0	—	1.3× / 21.8
Incidents · South China Seasurge	21	129	3	34	2.5× / 8.4
Icebergs · Labrador Seasurge	20	21.8	2	31	50× / 0.4
Exercises · South Atlantic Ocean	17	63.4	6	24	1.4× / 11.8
Nav aids · North Sea	14	339.5	13	364	1.3× / 11.2
Incidents · North Atlantic Ocean	14	143.9	6	73	1.2× / 11.6
Exercises · Yellow Sea	13	116.4	2	38	1.9× / 7
Exercises · Black Seasurge	12	94.7	1	40	60× / 0.2
Exercises · North Pacific Ocean	12	58.7	3	34	1.3× / 9.6
Incidents · South Atlantic Oceansurge	11	45.6	2	144	2.0× / 5.4
Exercises · Bay of Bengal	10	73.2	3	34	1.2× / 8.2
Icebergs · Hudson Straitsurge	10	9.9	0	—	8.3× / 1.2
Incidents · South Pacific Ocean	9	72.4	0	—	1.4× / 6.4
Nav aids · Irish Sea and St. George's Channelsurge	9	37.7	3	88	2.6× / 3.4
Quakes · South Pacific Ocean	9	32.2	0	—	0.8× / 10.6
Exercises · Arabian Sea	8	52.5	2	33	1.4× / 5.8
Quakes · Southern Oceansurge	8	24.4	0	—	40× / 0.2
Debris · North Atlantic Oceansurge	8	16.9	1	26	40× / 0.2
Nav aids · South Atlantic Oceanlong running	7	408.4	13	1,928	0.8× / 8.4
Nav aids · North Atlantic Ocean	7	173.4	5	241	1.1× / 6.4
Exercises · North Atlantic Ocean	7	42.4	0	—	1.5× / 4.8
Surveys · Adriatic Seanew	7	24.4	0	—	new / 0
Surveys · South Atlantic Oceansurge	6	204.1	7	311	3.0× / 2
Exercises · South China Sea	6	108.9	1	38	1.7× / 3.6
Cable ops · Gulf of Guineasurge	6	46.9	4	53	2.7× / 2.2
Derelicts · North Atlantic Ocean	6	20.1	0	—	1.5× / 4
Quakes · North Pacific Ocean	6	18	0	—	1.0× / 6.2
Nav aids · English Channellong running	5	139.3	4	604	1.9× / 2.6
Surveys · Mediterranean Sea - Eastern Basinsurge	5	105.8	4	89	3.6× / 1.4
Incidents · Mediterranean Sea - Eastern Basin	5	57.7	1	40	1.8× / 2.8
Cable ops · Mediterranean Sea - Eastern Basinsurge	5	55.7	3	86	2.3× / 2.2
Exercises · Coral Seasurge	5	26.9	0	—	3.1× / 1.6
Missiles · North Atlantic Oceansurge	5	17.3	2	17	2.8× / 1.8
Quakes · South Atlantic Oceansurge	5	15	0	—	4.2× / 1.2
Cable ops · Gulf of Mexicosurge	4	76.1	3	110	3.3× / 1.2
Exercises · Philippine Sea	4	75.9	1	59	0.8× / 5.2
Exercises · Aegean Seasurge	4	66.7	3	332	3.3× / 1.2
Incidents · Philippine Sea	4	45.8	0	—	1.2× / 3.4
Other · North Atlantic Oceansurge	4	36	1	28	2.5× / 1.6
Nav aids · Hudson Baynew	4	25.4	0	—	new / 0
Derelicts · Gulf of Mexicosurge	4	19.7	0	—	10× / 0.4
Exercises · South Pacific Ocean	4	16.2	1	28	0.9× / 4.6
Incidents · Adriatic Seasurge	4	12.4	1	24	10× / 0.4
Derelicts · North Pacific Ocean	4	12	0	—	1.8× / 2.2
Nav aids · Gulf of Mexicolong running	3	184.2	7	753	0.8× / 3.6
Cable ops · South China Sea	3	181.9	7	140	1.5× / 2
Cable ops · North Sea	3	77.5	1	91	1.3× / 2.4
Spills · Gulf of Mexico	3	68	1	40	0.8× / 3.8
Nav aids · Inner Seas off the West Coast of Scotland	3	56.7	2	149	0.7× / 4.2
Other · South Atlantic Ocean	3	55.8	3	26	1.7× / 1.8
Incidents · Caribbean Seasurge	3	40.5	1	26	3.0× / 1
Surveys · Gulf of Suezsurge	3	39.7	2	40	15× / 0.2
Surveys · North Pacific Oceansurge	3	30.3	0	—	3.8× / 0.8
Missiles · Black Seanew	3	21.8	0	—	new / 0
Nav aids · Mediterranean Sea - Western Basinsurge	3	11.2	1	12	5.0× / 0.6
Derelicts · Bay of Bengalsurge	3	9.1	0	—	15× / 0.2
Quakes · Indian Ocean	3	9	0	—	1.9× / 1.6
Derelicts · South China Sea	3	6.4	1	21	1.4× / 2.2
Wrecks · Coral Seanew	3	5.3	1	22	new / 0
Incidents · Bay of Bengalsurge	3	5	1	8	5.0× / 0.6
Incidents · Indian Ocean	3	0.9	0	—	0.3× / 9
Cable ops · Mozambique Channelnew	2	78.9	3	194	new / 0
Ordnance · North Sealong running	2	65.9	1	738	5.0× / 0.4
Volcanic · Philippine Seanewlong running	2	40.5	2	580	new / 0
Missiles · North Pacific Ocean	2	34	1	60	0.3× / 7.4
Missiles · Aegean Sea	2	31.2	2	332	10× / 0.2
Exercises · Laccadive Sea	2	31.2	1	34	0.6× / 3.6
Spills · Bering Sea	2	28	0	—	5.0× / 0.4
Incidents · Andaman or Burma Seanew	2	24.8	1	23	new / 0
Nav aids · Southern Oceannew	2	16.6	2	8	new / 0
Incidents · Gulf of Mexico	2	16.2	0	—	3.3× / 0.6
Incidents · Ionian Sea	2	12.9	0	—	10× / 0.2
Piracy · Indian Ocean	2	12.1	0	—	0.2× / 9.8
Missiles · Bay of Bengal	2	11.3	0	—	3.3× / 0.6
Missiles · Barentsz Sea	2	9.4	0	—	0.7× / 2.8
Quakes · Philippine Sea	2	8.5	0	—	1.0× / 2
Icebergs · South Atlantic Ocean	2	7.9	0	—	0.6× / 3.6
Other · Red Seanew	2	6.6	0	—	new / 0
Nav aids · Coral Sea	2	6.1	0	—	0.5× / 3.8
Containers · Irish Sea and St. George's Channelnew	2	6	0	—	new / 0
Quakes · Solomon Sea	2	6	0	—	1.1× / 1.8
Derelicts · South Atlantic Ocean	2	5.4	0	—	1.4× / 1.4
Surveys · Andaman or Burma Sea	2	4.6	2	2	10× / 0.2
Missiles · Laccadive Sea	2	4.5	0	—	5.0× / 0.4
Exercises · Baltic Sea	2	3.6	1	5	1.7× / 1.2
Derelicts · Indian Ocean	2	3.3	0	—	0.8× / 2.6
Incidents · Coral Sea	2	1.6	1	61	0.7× / 3
Surveys · Tasman Sea	2	1.2	0	—	10× / 0.2
Incidents · Gulf of Thailand	2	1.1	2	0	5.0× / 0.4
Nav aids · North Pacific Ocean	1	97.5	4	359	0.3× / 3
Nav aids · South China Sealong running	1	64.2	3	838	new / 0
Cable ops · North Atlantic Ocean	1	62.4	2	147	0.1× / 7
Nav aids · Indian Ocean	1	62.1	2	163	0.8× / 1.2
Cable ops · Persian Gulf	1	60	2	80	1.0× / 1
Other · South China Sea	1	59.5	1	101	5.0× / 0.2
Surveys · North Atlantic Ocean	1	54.9	2	119	5.0× / 0.2
Incidents · Laccadive Sea	1	51.7	1	32	2.5× / 0.4
Incidents · Tyrrhenian Sealong running	1	39.7	1	685	5.0× / 0.2
Other · Bay of Bengal	1	32.2	1	40	5.0× / 0.2
Cable ops · Kara Sea	1	32	1	66	new / 0
Other · Adriatic Sea	1	30	1	71	5.0× / 0.2
Wrecks · Eastern China Sea	1	29.6	1	29	new / 0
Spills · North Atlantic Ocean	1	22	0	—	0.6× / 1.6
Wrecks · English Channel	1	21.6	0	—	2.5× / 0.4
Incidents · Davis Strait	1	17	0	—	1.7× / 0.6
Incidents · Southern Ocean	1	16.9	0	—	new / 0
Incidents · Mozambique Channel	1	15.6	0	—	5.0× / 0.2
Incidents · Arabian Sea	1	15.2	0	—	0.8× / 1.2
Wrecks · Philippine Sea	1	15	1	15	new / 0
Cable ops · South Pacific Ocean	1	14.4	0	—	2.5× / 0.4
Missiles · South Atlantic Ocean	1	12.8	1	44	0.5× / 2
Cable ops · Sulu Sea	1	12.4	1	12	new / 0
Cable ops · Caribbean Sea	1	11.4	0	—	1.3× / 0.8
Surveys · Caribbean Sea	1	10.6	0	—	new / 0
Incidents · Mediterranean Sea - Western Basin	1	10.5	0	—	1.3× / 0.8
Surveys · Sea of Azov	1	10.5	1	10	new / 0
Other · English Channel	1	10	0	—	5.0× / 0.2
Piracy · Malacca Strait	1	8.1	0	—	new / 0
Missiles · Arabian Sea	1	7.1	0	—	new / 0
Missiles · South Pacific Ocean	1	6.7	0	—	1.7× / 0.6
Cable ops · Indian Ocean	1	6.5	1	6	2.5× / 0.4
Other · Sea of Okhotsk	1	4.6	1	4	new / 0
Restricted · Mediterranean Sea - Eastern Basin	1	4.5	1	4	new / 0
Cable ops · Bristol Channel	1	4.1	0	—	new / 0
Exercises · Indian Ocean	1	4.1	0	—	1.3× / 0.8
Missiles · Arctic Ocean	1	3.1	0	—	5.0× / 0.2
Quakes · Andaman or Burma Sea	1	3	0	—	5.0× / 0.2
Derelicts · Bay of Biscay	1	3	0	—	2.5× / 0.4
Quakes · Bering Sea	1	3	0	—	2.5× / 0.4
Debris · Caribbean Sea	1	3	0	—	new / 0
Quakes · Celebes Sea	1	3	0	—	1.0× / 1
Debris · Celtic Sea	1	3	0	—	new / 0
Debris · Ceram Sea	1	3	0	—	new / 0
Quakes · Coral Sea	1	3	0	—	0.4× / 2.4
Derelicts · Japan Sea	1	3	0	—	new / 0
Derelicts · Kara Sea	1	3	0	—	new / 0
Exercises · Mediterranean Sea - Eastern Basin	1	3	0	—	0.3× / 3
Quakes · Molukka Sea	1	3	0	—	2.5× / 0.4
Derelicts · Coral Sea	1	2.4	1	2	5.0× / 0.2
Quakes · Persian Gulf	1	2.4	1	2	5.0× / 0.2
Exercises · Adriatic Sea	1	2.2	0	—	new / 0
Incidents · Singapore Strait	1	1.9	1	1	new / 0
Wrecks · South China Sea	1	1.9	1	1	5.0× / 0.2
Missiles · Indian Ocean	1	1.8	0	—	new / 0
Nav aids · Black Sea	1	1.6	1	1	new / 0
Wrecks · Tasman Sea	1	1.5	0	—	new / 0
Ordnance · Aegean Sea	1	1.3	1	1	new / 0
Structures · Mediterranean Sea - Eastern Basin	1	1.3	1	1	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	1.3	0	—	0.6× / 1.8
Other · Mediterranean Sea - Eastern Basin	1	1.2	1	1	1.0× / 1
Icebergs · Davis Strait	1	1.1	0	—	0.2× / 4.4
Incidents · Bismarck Sea	1	1	0	—	new / 0
Nav aids · Tasman Sea	1	0.8	0	—	2.5× / 0.4
Piracy · Arabian Sea	1	0.3	0	—	0.1× / 8.2
Other · Coral Sea	1	0.2	0	—	1.7× / 0.6
Surveys · Arctic Oceanlong running	0	210	7	1,132	— / 0
Wrecks · Persian Gulflong running	0	148.6	4	452	0.0× / 0.2
Wrecks · South Atlantic Oceanlong running	0	125.5	4	1,298	0.0× / 0.8
Surveys · Beaufort Sealong running	0	120	4	1,207	— / 0
Wrecks · The Northwestern Passageslong running	0	120	4	1,182	0.0× / 0.2
Nav aids · Caribbean Sealong running	0	113.4	3	372	0.0× / 0.4
Other · North Sealong running	0	90.5	2	444	0.0× / 0.8
Nav aids · Arabian Sealong running	0	90	3	904	— / 0
Nav aids · Gulf of California	0	90	3	199	0.0× / 2.2
Surveys · Gulf of Mexico	0	90	3	72	0.0× / 0.4
Surveys · The Northwestern Passageslong running	0	90	3	481	— / 0
Surveys · Arabian Sea	0	60	2	331	0.0× / 0.8
Wrecks · Arabian Sea	0	60	2	226	0.0× / 0.2
Surveys · Gulf of Guinea	0	60	2	82	— / 0
Nav aids · Kara Sealong running	0	60	2	815	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	60	2	920	— / 0
Other · North Pacific Oceanlong running	0	60	2	593	0.0× / 0.8
Restricted · North Sealong running	0	60	2	831	— / 0
Structures · North Sealong running	0	60	2	838	— / 0
Wrecks · North Sea	0	60	2	264	0.0× / 0.6
Nav aids · Sea of Okhotsklong running	0	60	2	711	— / 0
Nav aids · Persian Gulf	0	51.4	1	143	0.0× / 0.8
Wrecks · Bay of Bengal	0	45.5	1	123	— / 0
Wrecks · Arctic Ocean	0	30	1	99	— / 0
Wrecks · Baltic Sea	0	30	1	187	— / 0
Wrecks · Barentsz Sea	0	30	1	44	— / 0
Nav aids · Bass Strait	0	30	1	243	0.0× / 0.2
Surveys · Bering Sea	0	30	1	127	— / 0
Cable ops · Black Sea	0	30	1	94	0.0× / 1.8
Mines · Black Sea	0	30	1	155	— / 0
Ordnance · Black Sea	0	30	1	155	— / 0
Restricted · Black Sea	0	30	1	178	0.0× / 0.2
Nav aids · Celtic Sealong running	0	30	1	401	0.0× / 2.8
Surveys · Chukchi Sea	0	30	1	362	— / 0
Surveys · Coral Sea	0	30	1	38	— / 0
Nav aids · Eastern China Sealong running	0	30	1	655	— / 0
Other · Gulf of Mexico	0	30	1	204	0.0× / 0.6
Wrecks · Gulf of Mexico	0	30	1	162	— / 0
Ordnance · Inner Seas off the West Coast of Scotland	0	30	1	176	— / 0
Exercises · Ionian Sea	0	30	1	332	0.0× / 0.4
Nav aids · Laccadive Sea	0	30	1	218	0.0× / 0.6
Nav aids · Mozambique Channel	0	30	1	50	— / 0
Surveys · Mozambique Channel	0	30	1	30	— / 0
Restricted · North Atlantic Ocean	0	30	1	115	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2013-11, 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.