Sea Ledger, October 2015

2015-10-01 to 2015-10-31 · archive

issued: 569
warning-days in force: 10,793
in force at month end: 334
sea × type cells: 255

baseline: same month, previous 5 years (2014-10, 2013-10, 2012-10, 2011-10, 2010-10)

By type

type	issued	warning-days	in force at end
Exercises	134	1,206.8	29
Incidents	129	1,346	46
Nav aids	62	2,610.7	86
Icebergs	37	84.4	2
Missiles	33	217.9	7
Derelicts	32	189.6	3
Surveys	27	1,560.5	49
Quakes	23	71.7	0
Cable ops	22	1,077.4	32
Other	19	690.9	22
Spills	12	159	6
Wrecks	8	835.9	29
Debris	8	24	0
Towing	8	24.6	1
Containers	5	15	0
Structures	3	113.9	4
Ordnance	3	76.4	2
Restricted	2	306.6	10
Volcanic	1	108.9	4
Piracy	1	10.9	0
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 · South China Seasurge	35	190.1	8	54	2.8× / 12.4
Incidents · North Pacific Ocean	23	126.3	9	36	0.9× / 25.8
Exercises · North Pacific Ocean	22	100.7	2	36	1.6× / 13.8
Icebergs · Labrador Sea	22	25.1	0	—	1.3× / 17.2
Exercises · Yellow Seasurge	21	145.3	5	36	2.0× / 10.4
Exercises · South Atlantic Ocean	13	126.9	2	52	1.5× / 8.6
Exercises · Arabian Sea	13	83.5	2	32	1.8× / 7.2
Quakes · South Pacific Ocean	13	39	0	—	1.4× / 9.2
Exercises · North Atlantic Oceansurge	12	43.9	3	66	4.0× / 3
Nav aids · South Atlantic Ocean	9	295.5	7	303	1.3× / 7.2
Incidents · North Atlantic Ocean	9	174.7	4	65	0.7× / 12.2
Derelicts · North Atlantic Oceansurgelong running	8	76.6	1	437	2.2× / 3.6
Incidents · Mediterranean Sea - Eastern Basin	8	69.3	0	—	1.0× / 8
Exercises · Black Sea	8	40.9	0	—	1.7× / 4.6
Incidents · Indian Ocean	8	30.7	2	19	1.3× / 6
Nav aids · North Atlantic Oceanlong running	7	227.8	8	940	0.9× / 7.8
Incidents · South Pacific Ocean	7	134.5	5	63	0.9× / 7.4
Exercises · Bay of Bengal	7	39.7	1	29	1.1× / 6.6
Incidents · Philippine Seasurge	7	30.5	1	29	2.1× / 3.4
Towing · Gulf of Mexiconew	7	22.3	1	29	new / 0
Exercises · South Pacific Ocean	7	20.8	1	35	1.6× / 4.4
Cable ops · Gulf of Mexicosurge	6	215.6	6	113	2.7× / 2.2
Nav aids · North Sealong running	6	129.7	5	1,056	0.5× / 13.2
Surveys · South Atlantic Ocean	6	106.7	3	168	1.0× / 5.8
Exercises · Barentsz Seanew	6	29.7	2	34	new / 0
Nav aids · Caribbean Seasurgelong running	5	371.1	13	747	3.1× / 1.6
Other · South China Seasurgelong running	5	88	3	801	6.3× / 0.8
Missiles · Barentsz Sea	5	35.2	1	32	1.7× / 3
Missiles · North Pacific Ocean	5	26.1	0	—	0.5× / 10
Derelicts · South Atlantic Oceansurge	5	15	0	—	4.2× / 1.2
Nav aids · Gulf of Mexicolong running	4	238.5	9	623	1.5× / 2.6
Nav aids · Coral Sealong running	4	130	4	561	1.7× / 2.4
Exercises · Philippine Sea	4	60.5	1	35	0.7× / 5.4
Cable ops · North Sea	4	58.8	1	61	1.4× / 2.8
Incidents · Caribbean Sea	4	52.9	3	58	1.4× / 2.8
Incidents · Arabian Seasurge	4	48.4	2	27	2.9× / 1.4
Spills · North Atlantic Oceansurge	4	46	2	34	2.9× / 1.4
Derelicts · South Pacific Oceansurgelong running	4	43	1	1,221	3.3× / 1.2
Exercises · Laccadive Sea	4	36.3	1	30	1.5× / 2.6
Spills · Gulf of Mexico	4	36	3	16	1.8× / 2.2
Missiles · Black Seasurge	4	20.6	2	30	5.0× / 0.8
Icebergs · Laptev Seanew	4	18	0	—	new / 0
Missiles · White Seasurge	4	14	1	18	20× / 0.2
Nav aids · Indian Oceanlong running	3	164.6	5	619	0.9× / 3.2
Other · Arabian Seanew	3	124.9	5	96	new / 0
Incidents · Gulf of Mexico	3	62.3	0	—	1.5× / 2
Incidents · South Atlantic Ocean	3	54.5	0	—	0.5× / 5.8
Other · North Seasurgelong running	3	46.9	1	764	3.0× / 1
Nav aids · Great Australian Bightsurge	3	33.8	1	241	2.5× / 1.2
Missiles · Sea of Okhotsksurge	3	21.8	1	24	3.8× / 0.8
Missiles · North Atlantic Ocean	3	20.4	0	—	0.9× / 3.2
Derelicts · Indian Ocean	3	11.8	1	33	1.3× / 2.4
Exercises · Baltic Sea	3	9.9	0	—	1.1× / 2.8
Derelicts · North Pacific Ocean	3	9	0	—	1.1× / 2.8
Icebergs · South Atlantic Ocean	3	9	0	—	0.9× / 3.2
Exercises · Mediterranean Sea - Eastern Basin	3	5.9	0	—	0.7× / 4.6
Icebergs · Hudson Baynew	3	3.4	0	—	new / 0
Icebergs · Hudson Straitsurge	3	2.4	1	3	3.8× / 0.8
Surveys · Beaufort Sealong running	2	245.3	8	1,907	1.3× / 1.6
Incidents · Davis Strait	2	121.2	4	54	0.9× / 2.2
Nav aids · Bay of Bengal	2	106.5	4	81	10× / 0.2
Wrecks · South China Sealong running	2	62.4	3	537	2.5× / 0.8
Surveys · Arabian Sea	2	60.2	3	74	3.3× / 0.6
Surveys · Gulf of Suez	2	52.4	1	39	3.3× / 0.6
Surveys · Indian Ocean	2	44.2	1	43	1.7× / 1.2
Nav aids · Inner Seas off the West Coast of Scotland	2	43.5	1	115	0.5× / 3.8
Missiles · Aegean Seanew	2	40.6	1	302	new / 0
Incidents · Mediterranean Sea - Western Basinnew	2	37	1	38	new / 0
Cable ops · Sea of Azovnew	2	31	1	32	new / 0
Other · The Northwestern Passagesnew	2	28.5	1	28	new / 0
Spills · Bering Seanew	2	28	0	—	new / 0
Surveys · Mediterranean Sea - Western Basin	2	27.4	1	26	5.0× / 0.4
Exercises · Gulf of Mexico	2	23.2	0	—	1.1× / 1.8
Incidents · Laccadive Sea	2	16.4	1	26	5.0× / 0.4
Surveys · Caribbean Sea	2	16.3	2	15	10× / 0.2
Exercises · Caribbean Sea	2	14.9	1	21	10× / 0.2
Missiles · Laccadive Sea	2	14.4	0	—	1.7× / 1.2
Derelicts · Bismarck Seanew	2	10.9	0	—	new / 0
Nav aids · Irish Sea and St. George's Channel	2	10.7	0	—	1.1× / 1.8
Quakes · South Atlantic Ocean	2	8.7	0	—	5.0× / 0.4
Missiles · Gulf of Omannew	2	6.4	0	—	new / 0
Quakes · Coral Sea	2	6	0	—	10× / 0.2
Debris · Gulf of Mexico	2	6	0	—	10× / 0.2
Containers · Laccadive Seanew	2	6	0	—	new / 0
Containers · North Atlantic Ocean	2	6	0	—	3.3× / 0.6
Debris · Norwegian Seanew	2	6	0	—	new / 0
Quakes · Philippine Sea	2	6	0	—	0.8× / 2.4
Nav aids · Yellow Seanew	2	5.8	1	5	new / 0
Incidents · Tyrrhenian Sea	2	4.7	2	2	3.3× / 0.6
Incidents · Coral Sea	2	4.3	0	—	0.4× / 5.2
Derelicts · Mediterranean Sea - Western Basin	2	4	0	—	10× / 0.2
Exercises · Adriatic Sea	2	3.9	0	—	2.0× / 1
Structures · South Atlantic Ocean	2	2.7	0	—	10× / 0.2
Incidents · Bismarck Sea	2	0.8	0	—	2.5× / 0.8
Exercises · Aegean Sea	1	223	6	302	0.4× / 2.6
Surveys · Arctic Oceanlong running	1	186	6	1,832	0.4× / 2.6
Exercises · South China Sea	1	123.3	0	—	0.1× / 6.8
Cable ops · North Atlantic Ocean	1	114.3	2	112	0.1× / 6.8
Nav aids · Sea of Okhotsklong running	1	91.6	3	1,411	new / 0
Wrecks · North Sealong running	1	62	2	809	2.5× / 0.4
Surveys · Black Sea	1	61.3	1	92	0.6× / 1.6
Nav aids · Mozambique Channel	1	58.1	1	172	5.0× / 0.2
Surveys · Bay of Bengal	1	51.5	1	87	1.7× / 0.6
Wrecks · English Channel	1	38.2	2	60	new / 0
Nav aids · Singapore Strait	1	36.8	2	170	new / 0
Nav aids · Malacca Strait	1	36.4	2	170	new / 0
Wrecks · South Pacific Ocean	1	34.8	1	31	1.3× / 0.8
Nav aids · The Northwestern Passages	1	34.6	2	37	0.8× / 1.2
Cable ops · Mediterranean Sea - Western Basin	1	34.5	1	74	new / 0
Nav aids · Eastern China Sealong running	1	34	1	1,355	new / 0
Cable ops · Barentsz Sea	1	33.2	2	117	new / 0
Nav aids · North Pacific Ocean	1	33.1	1	275	0.5× / 2
Other · Indian Ocean	1	32.9	1	78	1.3× / 0.8
Cable ops · Caribbean Sea	1	31	1	118	1.7× / 0.6
Cable ops · South Atlantic Ocean	1	31	1	45	0.0× / 24.6
Incidents · Bay of Biscay	1	30.5	0	—	2.5× / 0.4
Restricted · Caribbean Sea	1	30.3	1	30	new / 0
Wrecks · Andaman or Burma Sea	1	30.2	1	30	new / 0
Surveys · Adriatic Sea	1	28.3	1	28	0.6× / 1.6
Restricted · Sea of Azov	1	28.3	1	28	new / 0
Incidents · The Northwestern Passages	1	27.2	1	27	1.7× / 0.6
Icebergs · Kara Sea	1	25.4	0	—	new / 0
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	22	1	34	1.3× / 0.8
Structures · Makassar Strait	1	18.2	1	18	new / 0
Cable ops · Black Sea	1	17.6	1	17	0.5× / 2
Other · Chukchi Sea	1	17.5	1	17	new / 0
Cable ops · Arabian Sea	1	17.4	1	17	1.0× / 1
Volcanic · South Pacific Ocean	1	15.9	1	15	new / 0
Incidents · Bay of Bengal	1	14.9	0	—	0.8× / 1.2
Spills · North Pacific Ocean	1	14	0	—	0.8× / 1.2
Cable ops · Mediterranean Sea - Eastern Basin	1	12.6	0	—	0.7× / 1.4
Incidents · Eastern China Sea	1	11.5	1	11	new / 0
Piracy · Gulf of Guinea	1	10.9	0	—	5.0× / 0.2
Exercises · Tyrrhenian Sea	1	9.3	0	—	new / 0
Derelicts · Ionian Sea	1	6.8	0	—	new / 0
Incidents · Arafura Sea	1	6.7	1	6	2.5× / 0.4
Missiles · South Pacific Ocean	1	6.6	1	6	0.4× / 2.8
Missiles · Arctic Ocean	1	6.4	0	—	1.7× / 0.6
Nav aids · Labrador Sea	1	6.4	0	—	5.0× / 0.2
Nav aids · Timor Sea	1	6.1	1	6	5.0× / 0.2
Missiles · Kara Sea	1	5.4	0	—	0.7× / 1.4
Ordnance · Aegean Sea	1	5.3	0	—	new / 0
Surveys · Aegean Sea	1	5.2	0	—	5.0× / 0.2
Nav aids · Gulf of Alaska	1	5	0	—	0.4× / 2.8
Cable ops · Andaman or Burma Sea	1	4.5	1	4	5.0× / 0.2
Cable ops · Bay of Bengal	1	4.5	1	4	2.5× / 0.4
Ordnance · South China Sea	1	4.5	0	—	new / 0
Surveys · Persian Gulf	1	4.4	0	—	5.0× / 0.2
Other · Gulf of Mexico	1	4.3	1	4	1.0× / 1
Wrecks · Gulf of California	1	3.9	1	3	new / 0
Surveys · North Sea	1	3.1	0	—	1.3× / 0.8
Quakes · Bering Sea	1	3	0	—	5.0× / 0.2
Derelicts · Caribbean Sea	1	3	0	—	1.3× / 0.8
Derelicts · English Channel	1	3	0	—	5.0× / 0.2
Quakes · Indian Ocean	1	3	0	—	0.4× / 2.8
Exercises · Indian Ocean	1	3	0	—	1.7× / 0.6
Derelicts · Laccadive Sea	1	3	0	—	new / 0
Containers · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Debris · North Atlantic Ocean	1	3	0	—	1.0× / 1
Debris · North Pacific Ocean	1	3	0	—	5.0× / 0.2
Quakes · North Pacific Ocean	1	3	0	—	0.2× / 6.4
Debris · North Sea	1	3	0	—	5.0× / 0.2
Quakes · Southern Ocean	1	3	0	—	1.0× / 1
Debris · Timor Sea	1	3	0	—	1.7× / 0.6
Other · Celtic Sea	1	2.8	0	—	2.5× / 0.4
Surveys · Laccadive Sea	1	2.6	1	2	new / 0
Nav aids · Bristol Channel	1	2.3	0	—	new / 0
Towing · Caribbean Sea	1	2.3	0	—	new / 0
Surveys · Mediterranean Sea - Eastern Basin	1	2	0	—	0.8× / 1.2
Icebergs · Davis Strait	1	1.1	1	1	new / 0
Derelicts · South China Sea	1	1.1	0	—	0.6× / 1.8
Wrecks · Inner Seas off the West Coast of Scotland	1	1	0	—	new / 0
Nav aids · Norwegian Sea	1	1	0	—	new / 0
Nav aids · Southern Ocean	1	0.7	1	0	new / 0
Other · South Pacific Ocean	1	0.5	0	—	2.5× / 0.4
Ordnance · North Atlantic Ocean	1	0.2	0	—	new / 0
Exercises · Tasman Sea	1	0.2	0	—	new / 0
Other · Hudson Strait	1	0.1	0	—	2.5× / 0.4
Incidents · Timor Sea	1	0.1	0	—	1.0× / 1
Surveys · North Atlantic Oceanlong running	0	235.1	7	515	0.0× / 0.6
Restricted · North Sealong running	0	186	6	1,318	0.0× / 0.4
Wrecks · Arabian Sealong running	0	155	5	761	0.0× / 0.8
Nav aids · Arabian Sea	0	124	4	187	0.0× / 0.6
Surveys · Davis Strait	0	124	4	34	— / 0
Cable ops · South China Sea	0	115	3	72	0.0× / 4.4
Wrecks · Solomon Sea	0	93	3	235	— / 0
Cable ops · Kara Sea	0	81.4	2	87	0.0× / 0.4
Other · North Atlantic Oceanlong running	0	65.4	2	719	0.0× / 2
Surveys · South China Sea	0	64	2	131	0.0× / 0.2
Nav aids · Bass Straitlong running	0	62	2	943	0.0× / 0.8
Other · Caribbean Sea	0	62	2	284	0.0× / 0.8
Nav aids · Davis Strait	0	62	0	—	— / 0
Exercises · Ionian Sea	0	62	2	298	— / 0
Nav aids · Kara Sealong running	0	62	2	1,515	— / 0
Nav aids · Mediterranean Sea - Eastern Basin	0	62	2	302	0.0× / 0.6
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	1,620	— / 0
Nav aids · South China Sealong running	0	62	2	1,485	0.0× / 0.2
Surveys · The Northwestern Passageslong running	0	62	2	1,181	— / 0
Other · English Channel	0	57	1	48	0.0× / 0.6
Cable ops · Arctic Ocean	0	48	1	81	0.0× / 1

Cite: seahazards.com Sea Ledger, 2015-10, 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.