Sea Ledger, November 2015

2015-11-01 to 2015-11-30 · archive

issued: 555
warning-days in force: 9,546
in force at month end: 316
sea × type cells: 258

baseline: same month, previous 5 years (2014-11, 2013-11, 2012-11, 2011-11, 2010-11)

By type

type	issued	warning-days	in force at end
Exercises	128	1,072.7	30
Incidents	125	859.2	21
Nav aids	68	2,615.7	90
Quakes	42	122.9	3
Icebergs	38	52.3	3
Surveys	37	1,428.7	50
Missiles	37	243.8	11
Derelicts	20	124.4	3
Cable ops	20	815.8	32
Other	15	579.7	19
Debris	9	23.8	2
Spills	6	128	1
Containers	3	8	1
Wrecks	2	856.2	30
Piracy	2	9.8	1
Towing	2	16.8	0
Restricted	1	279.4	9
Volcanic	0	120	4
War risk	0	60	2
Structures	0	97.4	3
Ordnance	0	30.9	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	27	66.1	0	—	0.8× / 31.8
Icebergs · Labrador Seasurge	27	28.7	2	26	3.6× / 7.4
Exercises · North Pacific Oceansurge	22	94.3	1	34	2.0× / 10.8
Exercises · South Atlantic Ocean	19	116.4	2	53	1.6× / 12.2
Exercises · Yellow Sea	17	148.5	4	37	2.0× / 8.6
Incidents · North Atlantic Ocean	17	126.2	5	76	1.1× / 15.8
Nav aids · North Sealong running	15	112.9	2	1,086	1.1× / 14.2
Incidents · South China Sea	14	98.5	2	42	1.0× / 14.4
Incidents · Caribbean Seasurge	11	167.6	6	66	3.7× / 3
Missiles · Black Seasurge	10	78	2	38	17× / 0.6
Exercises · Bay of Bengal	10	60	2	32	1.2× / 8.4
Quakes · North Pacific Ocean	10	29.9	1	28	1.7× / 5.8
Surveys · Celtic Seasurge	10	20	0	—	10× / 1
Surveys · Arabian Seasurge	9	115.3	6	104	11× / 0.8
Incidents · Mediterranean Sea - Eastern Basin	9	46	0	—	1.7× / 5.4
Quakes · South Pacific Ocean	9	26.8	1	23	1.1× / 8.2
Nav aids · South Atlantic Ocean	8	325.7	15	333	1.0× / 7.8
Exercises · North Atlantic Ocean	8	50.1	2	96	1.5× / 5.4
Surveys · South Atlantic Oceansurge	7	104.1	4	198	2.3× / 3
Incidents · Gulf of Mexicosurge	7	69.1	3	29	4.4× / 1.6
Missiles · North Pacific Ocean	7	32.3	1	21	1.0× / 6.8
Exercises · Indian Oceansurge	7	19.5	0	—	7.0× / 1
Nav aids · North Atlantic Oceanlong running	6	202.1	6	970	1.3× / 4.8
Exercises · Aegean Sea	5	213.9	7	332	1.9× / 2.6
Derelicts · North Atlantic Oceanlong running	5	48.4	2	467	1.0× / 5
Exercises · Arabian Sea	5	34.4	1	35	0.6× / 8
Missiles · North Atlantic Ocean	5	18	3	25	1.5× / 3.4
Exercises · Mediterranean Sea - Eastern Basin	5	11.8	0	—	1.3× / 4
Spills · Gulf of Mexicosurge	4	76	1	39	2.2× / 1.8
Exercises · Gulf of Mexicosurge	4	62.8	0	—	5.0× / 0.8
Incidents · Arabian Seasurge	4	52.2	1	47	2.5× / 1.6
Incidents · Laccadive Seasurge	4	50.8	1	33	6.7× / 0.6
Incidents · South Pacific Ocean	4	45.6	1	75	0.6× / 7.2
Nav aids · Inner Seas off the West Coast of Scotland	4	38.7	2	145	0.9× / 4.4
Exercises · South Pacific Ocean	4	28.4	0	—	0.9× / 4.2
Exercises · Black Sea	4	15.5	1	27	1.2× / 3.4
Exercises · South China Sea	4	15.2	3	20	1.1× / 3.8
Quakes · Andaman or Burma Seasurge	4	12	0	—	6.7× / 0.6
Nav aids · Tasman Seasurge	4	5.8	1	7	6.7× / 0.6
Icebergs · Davis Strait	4	4.3	0	—	0.9× / 4.6
Nav aids · Gulf of Mexicolong running	3	256.5	8	653	0.8× / 3.6
Surveys · North Atlantic Oceansurgelong running	3	231.7	7	545	5.0× / 0.6
Cable ops · Bay of Bengalsurge	3	47.9	3	34	2.5× / 1.2
Exercises · Caribbean Seasurge	3	46.1	0	—	7.5× / 0.4
Missiles · Barentsz Sea	3	20.4	0	—	0.8× / 4
Nav aids · English Channel	3	12.4	0	—	0.9× / 3.2
Missiles · Bay of Bengalsurge	3	11	1	17	2.5× / 1.2
Derelicts · Indian Ocean	3	9.4	0	—	1.1× / 2.8
Incidents · Japan Seanew	3	9.3	0	—	new / 0
Icebergs · South Atlantic Ocean	3	9	0	—	1.7× / 1.8
Cable ops · Irish Sea and St. George's Channelsurge	3	8.9	0	—	3.8× / 0.8
Exercises · Baltic Sea	3	7.2	2	21	1.7× / 1.8
Debris · Celtic Seasurge	3	6.3	1	4	15× / 0.2
Quakes · Indian Ocean	3	6.2	1	22	1.9× / 1.6
Incidents · South Atlantic Ocean	3	6.2	1	20	0.6× / 5.2
Incidents · Philippine Sea	3	1.4	0	—	1.1× / 2.6
Nav aids · Arabian Sea	2	138.2	4	217	10× / 0.2
Other · Arabian Sea	2	104.3	3	126	10× / 0.2
Nav aids · Coral Sealong running	2	75.5	2	591	0.7× / 3
Other · North Sealong running	2	51.2	2	794	1.7× / 1.2
Cable ops · Arabian Sea	2	50	3	47	2.0× / 1
Nav aids · Celtic Sealong running	2	42.4	2	1,131	1.1× / 1.8
Missiles · Aegean Sea	2	37.2	1	332	3.3× / 0.6
Other · South Atlantic Oceanlong running	2	36.3	1	756	1.0× / 2
Other · Indian Oceannew	2	36	1	108	new / 0
Nav aids · North Pacific Ocean	2	36	1	305	0.8× / 2.4
Surveys · Gulf of Suez	2	35.2	1	34	1.7× / 1.2
Exercises · Laccadive Sea	2	34.9	1	31	0.8× / 2.4
Surveys · Bay of Bengal	2	32.2	2	117	10× / 0.2
Incidents · Tyrrhenian Sea	2	28.6	0	—	3.3× / 0.6
Incidents · Singapore Strait	2	16.4	0	—	10× / 0.2
Incidents · Bay of Bengal	2	15.9	0	—	1.3× / 1.6
Incidents · Mozambique Channel	2	14.4	0	—	3.3× / 0.6
Cable ops · Indian Ocean	2	13.3	2	61	2.5× / 0.8
Quakes · Banda Sea	2	6	0	—	2.5× / 0.8
Quakes · Bismarck Sea	2	6	0	—	3.3× / 0.6
Derelicts · Coral Sea	2	6	0	—	5.0× / 0.4
Quakes · Eastern China Sea	2	6	0	—	10× / 0.2
Icebergs · Indian Oceannew	2	6	0	—	new / 0
Quakes · Philippine Sea	2	6	0	—	1.3× / 1.6
Quakes · Savu Seanew	2	6	0	—	new / 0
Debris · Norwegian Seanew	2	5.5	1	5	new / 0
Derelicts · Caribbean Sea	2	4.4	0	—	5.0× / 0.4
Missiles · Indian Ocean	2	3.2	2	1	2.0× / 1
Incidents · Celebes Seanew	2	0.2	0	—	new / 0
Incidents · Timor Sea	2	0.2	0	—	5.0× / 0.4
Other · Arafura Sea	2	0	0	—	10× / 0.2
Nav aids · Bay of Bengal	1	130	5	111	0.8× / 1.2
Nav aids · Indian Oceanlong running	1	107.8	3	649	0.7× / 1.4
Nav aids · South China Sealong running	1	86.4	3	1,515	5.0× / 0.2
Other · South China Sealong running	1	65.3	2	831	1.3× / 0.8
Wrecks · English Channel	1	63.5	3	90	2.5× / 0.4
Nav aids · Mediterranean Sea - Eastern Basin	1	62.1	2	332	5.0× / 0.2
Nav aids · Bass Straitlong running	1	60.3	2	973	2.5× / 0.4
Surveys · Caribbean Sea	1	60	2	45	5.0× / 0.2
Cable ops · Andaman or Burma Sea	1	58.5	2	34	2.5× / 0.4
Cable ops · North Atlantic Ocean	1	52.8	2	142	0.1× / 7.6
Other · Gulf of Mexico	1	42.6	1	34	1.7× / 0.6
Surveys · Gulf of Mexico	1	37.1	2	70	5.0× / 0.2
Wrecks · Gulf of Mexico	1	37.1	2	238	new / 0
Cable ops · South Atlantic Ocean	1	36.6	2	51	0.0× / 27.2
Nav aids · Mozambique Channel	1	35.6	2	202	new / 0
Spills · North Atlantic Ocean	1	35	0	—	1.7× / 0.6
Cable ops · South China Sea	1	34.7	2	98	0.4× / 2.4
Derelicts · South Pacific Oceanlong running	1	33	1	1,251	0.6× / 1.8
Restricted · Sea of Azov	1	32	1	58	new / 0
Surveys · Indian Ocean	1	31.3	1	73	5.0× / 0.2
Other · North Atlantic Oceanlong running	1	30.8	1	749	0.4× / 2.6
Other · English Channel	1	30	1	69	5.0× / 0.2
Surveys · Laccadive Sea	1	30	1	32	5.0× / 0.2
Cable ops · Sea of Okhotsk	1	30	1	142	new / 0
Cable ops · Gulf of Oman	1	19.9	0	—	new / 0
Cable ops · Red Sea	1	19.6	1	19	5.0× / 0.2
Cable ops · Philippine Sea	1	18.9	1	18	2.5× / 0.4
Nav aids · Gulf of Suez	1	15.6	0	—	5.0× / 0.2
Nav aids · Adriatic Sea	1	14	1	14	new / 0
Spills · Gulf of Alaska	1	14	0	—	new / 0
Cable ops · North Sea	1	12.4	0	—	0.4× / 2.4
Missiles · White Sea	1	12.2	0	—	new / 0
Incidents · Indian Ocean	1	12.1	0	—	0.1× / 7.4
Nav aids · Red Sea	1	11.7	1	11	new / 0
Towing · Barentsz Sea	1	10.9	0	—	5.0× / 0.2
Derelicts · Red Sea	1	10.4	0	—	new / 0
Missiles · South Pacific Ocean	1	9.7	0	—	1.0× / 1
Exercises · Barentsz Sea	1	9	0	—	new / 0
Exercises · Coral Sea	1	9	1	8	0.4× / 2.8
Nav aids · Laptev Sea	1	8.7	0	—	new / 0
Missiles · Norwegian Sea	1	7.6	1	7	1.0× / 1
Cable ops · Mediterranean Sea - Eastern Basin	1	6.4	1	6	0.4× / 2.6
Missiles · Arabian Sea	1	6.1	0	—	0.6× / 1.6
Towing · Gulf of Mexico	1	5.9	0	—	new / 0
Piracy · Indian Ocean	1	5.9	0	—	0.1× / 7.4
Incidents · Molukka Sea	1	5.8	0	—	5.0× / 0.2
Exercises · Gulf of Thailand	1	4.9	0	—	new / 0
Missiles · Laccadive Sea	1	4.5	0	—	1.0× / 1
Nav aids · South Pacific Ocean	1	4.4	0	—	5.0× / 0.2
Nav aids · Gulf of California	1	4	0	—	5.0× / 0.2
Piracy · Gulf of Guinea	1	3.9	1	3	1.0× / 1
Incidents · Solomon Sea	1	3.6	0	—	5.0× / 0.2
Quakes · Caribbean Sea	1	3	0	—	new / 0
Containers · Coral Sea	1	3	0	—	new / 0
Debris · Coral Sea	1	3	0	—	new / 0
Debris · Gulf of Alaska	1	3	0	—	new / 0
Quakes · Ionian Sea	1	3	0	—	new / 0
Derelicts · Irish Sea and St. George's Channel	1	3	0	—	5.0× / 0.2
Icebergs · Laptev Sea	1	3	0	—	new / 0
Derelicts · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Quakes · Molukka Sea	1	3	0	—	0.5× / 2.2
Containers · North Pacific Ocean	1	3	0	—	new / 0
Derelicts · North Sea	1	3	0	—	new / 0
Incidents · Savu Sea	1	3	0	—	new / 0
Quakes · Solomon Sea	1	3	0	—	0.4× / 2.6
Quakes · South Atlantic Ocean	1	3	0	—	0.8× / 1.2
Debris · South China Sea	1	3	0	—	new / 0
Quakes · South China Sea	1	3	0	—	1.7× / 0.6
Derelicts · Tasman Sea	1	3	0	—	2.5× / 0.4
Debris · Timor Sea	1	3	0	—	0.8× / 1.2
Incidents · Gulf of Thailand	1	2.5	1	2	0.7× / 1.4
Nav aids · Irish Sea and St. George's Channel	1	2.5	0	—	0.3× / 3.8
Other · Laccadive Sea	1	2.2	1	2	new / 0
Containers · English Channel	1	2	1	1	2.5× / 0.4
Nav aids · Laccadive Sea	1	1.5	0	—	1.7× / 0.6
Exercises · Tasman Sea	1	0.7	0	—	new / 0
Nav aids · Japan Sea	1	0.6	0	—	new / 0
Incidents · Arafura Sea	1	0.5	0	—	1.3× / 0.8
Exercises · Adriatic Sea	1	0.4	1	0	5.0× / 0.2
Derelicts · Makassar Strait	1	0.4	0	—	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	0.4	1	0	0.7× / 1.4
Derelicts · North Pacific Ocean	1	0.4	0	—	0.4× / 2.6
Exercises · Alboran Sea	1	0.3	0	—	5.0× / 0.2
Icebergs · Southern Ocean	1	0.3	1	0	2.5× / 0.4
Incidents · Gulf of Tomini	1	0.2	0	—	new / 0
Nav aids · Strait of Gibraltar	1	0.1	0	—	new / 0
Nav aids · Caribbean Sealong running	0	390	13	658	0.0× / 0.4
Surveys · Beaufort Sealong running	0	240	8	1,937	— / 0
Surveys · Arctic Oceanlong running	0	180	6	1,862	— / 0
Cable ops · Gulf of Mexico	0	180	6	143	0.0× / 1.2
Restricted · North Sealong running	0	180	6	1,348	— / 0
Wrecks · Arabian Sealong running	0	150	5	791	0.0× / 0.2
Surveys · Davis Strait	0	120	4	64	— / 0
Nav aids · Sea of Okhotsklong running	0	90	3	1,441	— / 0
Wrecks · Solomon Sea	0	90	3	265	— / 0
Wrecks · South China Sealong running	0	90	3	567	0.0× / 0.4
Other · Caribbean Sea	0	60	2	314	0.0× / 0.4
Exercises · Ionian Sea	0	60	2	328	0.0× / 0.4
Nav aids · Kara Sealong running	0	60	2	1,545	— / 0
Nav aids · Malacca Strait	0	60	2	200	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	60	2	1,650	— / 0
Nav aids · Singapore Strait	0	60	2	200	— / 0
Surveys · The Northwestern Passageslong running	0	60	2	1,211	— / 0
Nav aids · The Northwestern Passages	0	40	1	67	— / 0
Wrecks · North Sealong running	0	35.6	1	839	0.0× / 1
Wrecks · Andaman or Burma Sea	0	30	1	60	— / 0
Cable ops · Arctic Ocean	0	30	1	111	— / 0
Surveys · Bering Sea	0	30	1	147	— / 0
Cable ops · Black Sea	0	30	1	47	0.0× / 1.8
Restricted · Black Sealong running	0	30	1	908	0.0× / 0.2
Volcanic · Caribbean Sea	0	30	1	130	— / 0
Wrecks · Caribbean Sealong running	0	30	1	412	— / 0
Wrecks · Celtic Sea	0	30	1	91	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2015-11, 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.