Sea Ledger, December 2015

2015-12-01 to 2015-12-31 · archive

issued: 568
warning-days in force: 9,997
in force at month end: 311
sea × type cells: 250

baseline: same month, previous 5 years (2014-12, 2013-12, 2012-12, 2011-12, 2010-12)

By type

type	issued	warning-days	in force at end
Incidents	135	781.7	20
Exercises	97	885.8	23
Nav aids	70	2,935.4	94
Missiles	63	299.8	1
Derelicts	36	161	5
Cable ops	34	1,065.4	37
Surveys	28	1,485.9	51
Icebergs	25	47.5	1
Quakes	24	72.6	2
Debris	13	30.8	3
Other	11	499.7	14
Wrecks	9	1,000.2	35
Spills	8	86	3
Restricted	5	314.5	13
Containers	4	13	0
Ordnance	3	50.1	1
Structures	2	99.9	3
Piracy	1	7	0
Volcanic	0	98.9	3
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
Incidents · Mediterranean Sea - Eastern Basinsurge	27	106.7	3	28	5.0× / 5.4
Missiles · North Atlantic Oceansurge	25	48.4	0	—	6.9× / 3.6
Exercises · North Pacific Ocean	21	62.8	1	35	1.5× / 13.8
Exercises · Yellow Seasurge	19	132.1	4	36	2.1× / 9
Incidents · North Pacific Ocean	19	7.3	1	30	0.8× / 24.2
Incidents · North Atlantic Ocean	18	154.8	6	39	1.1× / 15.6
Nav aids · North Sea	13	137.8	4	135	0.7× / 17.8
Incidents · South China Sea	13	111.3	1	64	0.7× / 18.4
Icebergs · Labrador Sea	12	14.1	0	—	0.8× / 15.2
Quakes · South Pacific Ocean	11	33.2	0	—	1.3× / 8.2
Icebergs · South Atlantic Oceansurge	11	24.7	1	23	2.1× / 5.2
Missiles · Indian Oceansurge	10	25.9	0	—	17× / 0.6
Nav aids · South Atlantic Ocean	9	429.7	12	364	1.4× / 6.2
Incidents · Caribbean Sea	9	159.8	3	60	1.8× / 5
Surveys · Arabian Seasurge	9	132.1	8	54	23× / 0.4
Exercises · South Atlantic Ocean	9	34.6	1	35	1.1× / 8.6
Incidents · Philippine Seasurge	9	1.5	1	30	3.0× / 3
Surveys · North Atlantic Oceansurgelong running	8	237.9	8	576	8.0× / 1
Exercises · Aegean Seasurge	8	232.6	9	363	2.2× / 3.6
Exercises · Arabian Sea	7	75.9	2	35	1.1× / 6.6
Cable ops · Gulf of Omannew	7	26.1	1	29	new / 0
Restricted · Sea of Azovnew	5	66.5	5	60	new / 0
Missiles · Black Seanew	5	66	0	—	new / 0
Other · North Seasurgelong running	5	63.5	3	825	2.5× / 2
Missiles · North Pacific Ocean	5	26	0	—	1.0× / 5
Missiles · Barentsz Sea	5	24.8	0	—	1.6× / 3.2
Incidents · South Atlantic Ocean	5	20	1	32	1.3× / 4
Derelicts · Bay of Bengalsurge	5	17.2	0	—	8.3× / 0.6
Derelicts · Caribbean Seasurge	5	15	0	—	8.3× / 0.6
Exercises · Indian Oceansurge	5	11.2	0	—	2.8× / 1.8
Derelicts · Philippine Seasurge	5	7.5	0	—	8.3× / 0.6
Incidents · Coral Sea	5	4.4	0	—	0.9× / 5.4
Nav aids · Caribbean Seasurgelong running	4	426.7	13	689	10× / 0.4
Exercises · Bay of Bengal	4	50.8	0	—	0.5× / 7.6
Incidents · Indian Ocean	4	41.4	1	29	0.6× / 7
Nav aids · English Channelsurge	4	29.7	2	30	2.5× / 1.6
Missiles · South Pacific Oceansurge	4	12.8	0	—	6.7× / 0.6
Exercises · Mediterranean Sea - Eastern Basin	4	11.7	0	—	0.9× / 4.2
Debris · Celtic Seanew	4	9.5	2	31	new / 0
Debris · English Channelnew	4	6	0	—	new / 0
Nav aids · North Atlantic Oceanlong running	3	222.5	7	953	0.3× / 9.4
Cable ops · Gulf of Mexicosurge	3	190.6	6	174	2.1× / 1.4
Nav aids · Coral Sealong running	3	71.3	3	622	1.5× / 2
Nav aids · Inner Seas off the West Coast of Scotland	3	51.3	2	176	0.5× / 6
Derelicts · North Atlantic Oceanlong running	3	46.1	1	498	0.8× / 3.6
Spills · Gulf of Mexico	3	16	3	45	1.5× / 2
Missiles · Arabian Seanew	3	15.2	0	—	new / 0
Incidents · Java Seasurge	3	14.5	0	—	3.8× / 0.8
Quakes · North Pacific Ocean	3	6.7	1	33	0.5× / 6.6
Derelicts · South China Sea	3	4.5	0	—	0.9× / 3.4
Nav aids · Irish Sea and St. George's Channel	3	1.3	0	—	1.3× / 2.4
Nav aids · Gulf of Mexicolong running	2	262.2	9	684	0.8× / 2.4
Surveys · South Atlantic Ocean	2	123.3	4	119	0.5× / 4.4
Cable ops · Indian Ocean	2	96.9	4	35	1.4× / 1.4
Nav aids · Celtic Sealong running	2	91.9	3	1,162	0.7× / 3
Cable ops · South Atlantic Ocean	2	80.3	3	82	0.1× / 35.4
Exercises · South China Sea	2	73.3	1	36	0.7× / 3
Nav aids · Great Australian Bight	2	61.1	2	302	1.4× / 1.4
Wrecks · Caribbean Seanewlong running	2	46.1	2	443	new / 0
Derelicts · South Pacific Oceanlong running	2	37	1	1,282	1.4× / 1.4
Other · North Atlantic Oceanlong running	2	36.4	2	780	2.0× / 1
Exercises · North Atlantic Ocean	2	32.8	0	—	0.6× / 3.2
Cable ops · Mediterranean Sea - Eastern Basin	2	30.9	1	37	0.9× / 2.2
Spills · North Atlantic Ocean	2	28	0	—	1.4× / 1.4
Spills · North Pacific Ocean	2	28	0	—	3.3× / 0.6
Nav aids · Laccadive Sea	2	26.6	1	16	5.0× / 0.4
Incidents · Arabian Sea	2	26.5	0	—	1.3× / 1.6
Exercises · Philippine Sea	2	24.7	1	23	0.8× / 2.6
Other · Gulf of Mexico	2	18.5	2	65	5.0× / 0.4
Cable ops · Eastern China Sea	2	17.9	0	—	3.3× / 0.6
Ordnance · Sea of Azovnew	2	15.6	0	—	new / 0
Incidents · South Pacific Ocean	2	13.2	0	—	0.3× / 7.2
Exercises · Barentsz Sea	2	12.7	0	—	10× / 0.2
Missiles · White Seanew	2	12.5	0	—	new / 0
Missiles · Laccadive Sea	2	10.9	0	—	1.4× / 1.4
Nav aids · Gulf of Alaska	2	10.3	1	14	1.3× / 1.6
Derelicts · Mediterranean Sea - Eastern Basin	2	9.7	0	—	5.0× / 0.4
Quakes · Indian Ocean	2	8.8	0	—	0.9× / 2.2
Surveys · Ionian Seanew	2	8.8	0	—	new / 0
Structures · South Atlantic Oceannew	2	6.9	0	—	new / 0
Cable ops · Arafura Seanew	2	6.5	1	6	new / 0
Quakes · Banda Sea	2	6	0	—	1.3× / 1.6
Derelicts · Coral Sea	2	6	0	—	2.0× / 1
Containers · North Atlantic Ocean	2	6	0	—	2.5× / 0.8
Derelicts · North Pacific Ocean	2	6	0	—	1.7× / 1.2
Quakes · South Atlantic Ocean	2	6	0	—	1.3× / 1.6
Exercises · Alboran Sea	2	5.8	0	—	3.3× / 0.6
Debris · South Pacific Ocean	2	5.8	1	19	2.0× / 1
Exercises · Coral Sea	2	5.5	0	—	2.0× / 1
Cable ops · Bristol Channelnew	2	4.5	0	—	new / 0
Exercises · Gulf of Mexico	2	3.4	0	—	2.0× / 1
Exercises · South Pacific Ocean	2	3.4	0	—	1.4× / 1.4
Derelicts · Arabian Sea	2	3.2	1	2	5.0× / 0.4
Incidents · Molukka Seanew	2	2.7	0	—	new / 0
Derelicts · South Atlantic Ocean	2	1.5	1	4	3.3× / 0.6
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	2	0.8	0	—	1.7× / 1.2
Nav aids · Davis Straitnew	2	0.1	0	—	new / 0
Incidents · Tasman Sea	2	0.1	1	0	2.5× / 0.8
Nav aids · Bay of Bengal	1	168.2	6	142	5.0× / 0.2
Wrecks · Arabian Sealong running	1	160.4	6	822	1.7× / 0.6
Nav aids · Arabian Sea	1	100.4	3	248	1.0× / 1
Nav aids · Indian Oceanlong running	1	96.6	4	680	0.7× / 1.4
Wrecks · English Channel	1	92.4	3	121	2.5× / 0.4
Cable ops · Arabian Sea	1	88.6	3	78	0.4× / 2.4
Cable ops · Bay of Bengal	1	86.6	3	65	0.5× / 2
Nav aids · South China Sealong running	1	81.9	2	1,546	new / 0
Nav aids · Malacca Strait	1	80.2	3	231	new / 0
Cable ops · Andaman or Burma Sea	1	78.5	1	65	1.0× / 1
Nav aids · Bass Straitlong running	1	71.7	2	1,004	new / 0
Nav aids · Singapore Strait	1	59.4	2	231	new / 0
Surveys · Bay of Bengal	1	58.5	0	—	5.0× / 0.2
Wrecks · South Pacific Ocean	1	58	2	92	2.5× / 0.4
Nav aids · North Pacific Ocean	1	54.4	2	336	0.5× / 2.2
Wrecks · Irish Sea and St. George's Channel	1	46.4	2	195	new / 0
Cable ops · South China Sea	1	42.8	2	114	0.5× / 2
Incidents · Gulf of Thailand	1	36.7	0	—	2.5× / 0.4
Nav aids · Southern Ocean	1	34.8	1	61	5.0× / 0.2
Wrecks · North Sealong running	1	32.1	2	870	2.5× / 0.4
Cable ops · Black Sea	1	31.4	1	78	0.8× / 1.2
Cable ops · Ionian Sea	1	30.9	1	30	2.5× / 0.4
Exercises · Laccadive Sea	1	30.2	1	34	0.7× / 1.4
Surveys · Sea of Azov	1	29.5	1	97	5.0× / 0.2
Surveys · Laccadive Sea	1	27.9	1	41	5.0× / 0.2
Other · English Channel	1	26.8	0	—	new / 0
Nav aids · South Pacific Ocean	1	20.8	1	20	0.7× / 1.4
Incidents · Gulf of Mexico	1	19.2	0	—	1.3× / 0.8
Cable ops · Celtic Sea	1	14.5	1	14	new / 0
Spills · Bering Sea	1	14	0	—	0.8× / 1.2
Nav aids · Gulf of Suez	1	12.6	0	—	new / 0
Surveys · Gulf of Suez	1	12.5	1	31	1.7× / 0.6
Incidents · Bay of Biscay	1	10.5	0	—	new / 0
Incidents · Laccadive Sea	1	10.2	0	—	1.3× / 0.8
Incidents · Bismarck Sea	1	9.6	1	9	1.3× / 0.8
Incidents · Mozambique Channel	1	9.2	0	—	0.6× / 1.8
Cable ops · Timor Sea	1	7.7	1	7	5.0× / 0.2
Incidents · Singapore Strait	1	7.6	0	—	new / 0
Surveys · Black Sea	1	7.5	0	—	1.3× / 0.8
Surveys · Aegean Sea	1	7.3	0	—	new / 0
Missiles · Bay of Bengal	1	7.3	0	—	0.7× / 1.4
Exercises · Andaman or Burma Sea	1	6.8	0	—	2.5× / 0.4
Wrecks · South Atlantic Ocean	1	6.4	0	—	2.5× / 0.4
Icebergs · Southern Ocean	1	5.7	0	—	0.6× / 1.6
Incidents · Celebes Sea	1	5.5	1	5	new / 0
Cable ops · English Channel	1	5.1	0	—	5.0× / 0.2
Incidents · Japan Sea	1	5	0	—	1.3× / 0.8
Cable ops · Balearic (Iberian Sea)	1	4.4	1	4	5.0× / 0.2
Exercises · Caribbean Sea	1	4.4	0	—	new / 0
Missiles · Arctic Ocean	1	4	0	—	1.7× / 0.6
Exercises · Baltic Sea	1	3.8	1	34	0.7× / 1.4
Ordnance · Black Sea	1	3.5	0	—	5.0× / 0.2
Cable ops · Yellow Sea	1	3.5	1	3	2.5× / 0.4
Derelicts · Banda Sea	1	3	0	—	5.0× / 0.2
Quakes · Bismarck Sea	1	3	0	—	2.5× / 0.4
Quakes · Caribbean Sea	1	3	0	—	5.0× / 0.2
Quakes · Celebes Sea	1	3	0	—	5.0× / 0.2
Containers · Indian Ocean	1	3	0	—	new / 0
Debris · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Debris · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Icebergs · North Atlantic Ocean	1	3	0	—	new / 0
Containers · North Pacific Ocean	1	3	0	—	1.3× / 0.8
Debris · Persian Gulf	1	3	0	—	new / 0
Derelicts · Tasman Sea	1	3	0	—	1.3× / 0.8
Cable ops · Mediterranean Sea - Western Basin	1	2.9	0	—	5.0× / 0.2
Quakes · Solomon Sea	1	2.9	1	2	0.8× / 1.2
Nav aids · Mediterranean Sea - Western Basin	1	2.3	0	—	2.5× / 0.4
Incidents · Eastern China Sea	1	2.2	0	—	new / 0
Piracy · Yellow Sea	1	1.6	0	—	new / 0
Derelicts · North Sea	1	1.3	1	1	5.0× / 0.2
Incidents · Solomon Sea	1	1	0	—	5.0× / 0.2
Surveys · Kara Sea	1	0.6	1	0	new / 0
Nav aids · Rio de La Plata	1	0.6	0	—	new / 0
Incidents · Celtic Sea	1	0.5	0	—	2.5× / 0.4
Nav aids · Strait of Gibraltar	1	0.5	0	—	new / 0
Other · Bass Strait	1	0.4	0	—	new / 0
Wrecks · Southern Ocean	1	0.4	0	—	new / 0
Incidents · Banda Sea	1	0.3	0	—	5.0× / 0.2
Incidents · Arafura Sea	1	0	0	—	1.7× / 0.6
Incidents · Timor Sea	1	0	0	—	5.0× / 0.2
Surveys · Beaufort Sealong running	0	248	8	1,968	— / 0
Surveys · Arctic Oceanlong running	0	186	6	1,893	— / 0
Restricted · North Sealong running	0	186	6	1,379	0.0× / 0.2
Surveys · Davis Strait	0	124	4	95	— / 0
Wrecks · Solomon Sea	0	93	3	296	— / 0
Wrecks · South China Sealong running	0	93	3	598	— / 0
Nav aids · Sea of Okhotsklong running	0	67.4	2	1,472	0.0× / 0.4
Other · Arabian Sea	0	64	1	94	— / 0
Surveys · Caribbean Sea	0	62	2	62	— / 0
Surveys · Gulf of Mexico	0	62	2	101	0.0× / 0.2
Wrecks · Gulf of Mexico	0	62	2	269	— / 0
Exercises · Ionian Sea	0	62	2	359	0.0× / 0.4
Nav aids · Kara Sealong running	0	62	2	1,576	0.0× / 0.4
Nav aids · Mediterranean Sea - Eastern Basin	0	62	2	363	0.0× / 0.4
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	1,681	— / 0
Surveys · The Northwestern Passageslong running	0	62	2	1,242	— / 0
Other · South China Sealong running	0	50.5	1	862	0.0× / 0.8
Other · Caribbean Sea	0	43	1	345	0.0× / 0.8
Nav aids · Mozambique Channel	0	34.6	1	233	— / 0
Missiles · Aegean Sea	0	31	1	363	0.0× / 0.4
Wrecks · Andaman or Burma Sea	0	31	1	91	— / 0
Cable ops · Arctic Ocean	0	31	1	142	— / 0

Cite: seahazards.com Sea Ledger, 2015-12, 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.