Sea Ledger, September 2015

2015-09-01 to 2015-09-30 · archive

issued: 679
warning-days in force: 9,946
in force at month end: 346
sea × type cells: 241

baseline: same month, previous 5 years (2014-09, 2013-09, 2012-09, 2011-09, 2010-09)

By type

type	issued	warning-days	in force at end
Incidents	158	1,132.3	41
Exercises	141	1,088.4	34
Quakes	69	193.3	1
Nav aids	66	2,383.8	78
Icebergs	58	88.5	19
Cable ops	52	1,295.3	40
Surveys	36	1,279.7	51
Missiles	27	193.8	8
Other	21	642.6	23
Derelicts	19	117.1	4
Spills	10	174	3
Wrecks	7	764.5	25
Containers	5	10.7	0
Debris	5	15.3	0
Ordnance	3	82.2	3
Restricted	1	210.7	8
Towing	1	9.1	0
War risk	0	60	2
Volcanic	0	90	3
Structures	0	108	3
Piracy	0	6.3	0

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Exercises · North Pacific Oceansurge	48	120.9	3	34	3.2× / 14.8
Quakes · South Pacific Oceansurge	47	130	0	—	4.3× / 10.8
Incidents · North Pacific Ocean	38	90	1	29	1.4× / 26.2
Icebergs · Labrador Sea	30	32.9	2	31	1.6× / 18.2
Incidents · Mediterranean Sea - Eastern Basin	20	75.8	5	28	1.7× / 11.8
Incidents · South China Sea	19	149.9	5	71	1.7× / 11.2
Cable ops · North Seasurge	18	117.9	4	89	3.9× / 4.6
Exercises · Yellow Sea	16	141.6	4	33	1.9× / 8.6
Exercises · South Atlantic Ocean	14	98.8	4	35	1.6× / 8.8
Icebergs · Laptev Seanew	14	36	7	16	new / 0
Icebergs · Kara Seasurge	13	16.6	10	16	65× / 0.2
Nav aids · South Atlantic Ocean	12	333.2	8	272	1.9× / 6.2
Incidents · South Pacific Oceansurge	12	92.6	5	32	2.4× / 5
Incidents · North Atlantic Ocean	11	177.7	8	70	1.3× / 8.8
Nav aids · North Sealong running	9	136.4	5	1,025	0.9× / 9.6
Exercises · Black Sea	8	49.8	1	33	1.4× / 5.6
Quakes · North Pacific Ocean	8	24	0	—	0.9× / 8.4
Cable ops · Gulf of Mexicosurge	7	205.4	7	82	2.7× / 2.6
Nav aids · Davis Straitnew	7	72.8	2	108	new / 0
Incidents · South Atlantic Ocean	7	68	3	33	0.8× / 8.4
Exercises · North Atlantic Ocean	7	39.2	2	35	1.4× / 5
Missiles · North Atlantic Ocean	7	36.7	4	32	1.2× / 5.8
Nav aids · Irish Sea and St. George's Channelsurge	7	34	2	37	2.5× / 2.8
Missiles · North Pacific Ocean	7	30.6	2	29	0.7× / 10
Missiles · Barentsz Seasurge	7	28	1	22	2.3× / 3
Exercises · South Pacific Ocean	7	18.6	1	25	1.1× / 6.6
Incidents · Philippine Sea	7	7.6	0	—	1.8× / 3.8
Surveys · North Atlantic Oceansurgelong running	6	255.1	11	484	2.5× / 2.4
Cable ops · North Atlantic Ocean	6	155.9	4	111	0.7× / 8.2
Exercises · South China Sea	6	107.3	6	47	1.4× / 4.4
Incidents · Indian Ocean	6	29	0	—	0.7× / 9.2
Derelicts · Indian Oceansurge	6	18.5	1	21	2.5× / 2.4
Surveys · South Atlantic Ocean	5	87.8	3	137	1.7× / 3
Incidents · Caribbean Sea	5	69.8	2	27	1.9× / 2.6
Exercises · Bay of Bengal	5	37	0	—	0.7× / 7.4
Exercises · Mediterranean Sea - Eastern Basin	5	13.7	0	—	1.3× / 3.8
Incidents · Coral Sea	5	6.9	0	—	1.4× / 3.6
Nav aids · The Coastal Waters of Southeast Alaska and British Columbiasurge	5	5.3	0	—	13× / 0.4
Nav aids · North Atlantic Oceanlong running	4	137.2	4	909	0.6× / 6.8
Incidents · Davis Straitsurge	4	64.1	3	23	2.0× / 2
Exercises · Philippine Sea	4	53.6	2	34	0.9× / 4.6
Exercises · Barentsz Seasurge	4	17.1	1	10	10× / 0.4
Surveys · Davis Straitnew	4	14.1	4	3	new / 0
Incidents · Mozambique Channel	4	13.2	2	20	1.8× / 2.2
Quakes · Solomon Seasurge	4	12	0	—	2.9× / 1.4
Containers · Java Seanew	4	7.7	0	—	new / 0
Derelicts · English Channelnew	4	4.7	0	—	new / 0
Other · The Northwestern Passagessurge	4	4.2	0	—	10× / 0.4
Cable ops · South China Sea	3	226.6	6	90	0.8× / 4
Nav aids · Gulf of Mexicolong running	3	217	7	592	0.9× / 3.2
Spills · North Atlantic Oceansurge	3	54	1	34	3.8× / 0.8
Other · English Channelsurge	3	40.6	3	114	7.5× / 0.4
Exercises · Arabian Sea	3	39.4	1	34	0.5× / 6
Nav aids · North Pacific Ocean	3	36.3	1	244	1.3× / 2.4
Nav aids · Inner Seas off the West Coast of Scotland	3	32.9	1	84	1.3× / 2.4
Spills · The Coastal Waters of Southeast Alaska and British Columbiasurge	3	31	1	29	3.8× / 0.8
Cable ops · Irish Sea and St. George's Channelsurge	3	25.7	0	—	15× / 0.2
Cable ops · Arabian Seasurge	3	24.4	0	—	15× / 0.2
Exercises · Bering Seasurge	3	3.6	0	—	2.1× / 1.4
Other · Irish Sea and St. George's Channelsurge	3	3	0	—	15× / 0.2
Exercises · Aegean Sea	2	211.2	7	271	1.0× / 2
Wrecks · North Atlantic Oceanlong running	2	78.6	1	406	3.3× / 0.6
Surveys · Black Sea	2	77	2	70	1.7× / 1.2
Incidents · Mediterranean Sea - Western Basin	2	69.8	1	69	5.0× / 0.4
Other · South China Sealong running	2	65.1	2	770	2.5× / 0.8
Other · North Atlantic Oceanlong running	2	64.5	3	688	5.0× / 0.4
Incidents · Gulf of Mexico	2	54.3	1	66	0.9× / 2.2
Ordnance · North Sea	2	52.7	2	40	3.3× / 0.6
Other · North Sealong running	2	48.9	2	733	1.7× / 1.2
Surveys · Arabian Sea	2	46.6	2	43	5.0× / 0.4
Surveys · South China Seanew	2	37.6	3	100	new / 0
Surveys · Indian Oceannew	2	35.5	1	263	new / 0
Wrecks · The Northwestern Passages	2	33.9	1	22	1.4× / 1.4
Derelicts · North Atlantic Oceanlong running	2	33.5	1	406	0.8× / 2.6
Cable ops · Mediterranean Sea - Eastern Basin	2	32.9	0	—	0.7× / 2.8
Nav aids · Great Australian Bightnew	2	30.7	1	210	new / 0
Spills · Bering Sea	2	28	0	—	5.0× / 0.4
Surveys · Mediterranean Sea - Eastern Basin	2	26.9	0	—	2.0× / 1
Surveys · Gulf of Suez	2	26.2	2	37	5.0× / 0.4
Incidents · Laccadive Sea	2	21.1	0	—	2.5× / 0.8
Cable ops · South Atlantic Ocean	2	20.6	1	20	0.1× / 17.4
Incidents · Bay of Bengal	2	19.9	1	35	1.4× / 1.4
Missiles · Laptev Sea	2	19.5	0	—	2.5× / 0.8
Exercises · Gulf of Mexico	2	13.4	0	—	1.7× / 1.2
Cable ops · Gulf of Guinea	2	12.3	1	12	1.4× / 1.4
Exercises · Baltic Sea	2	11.3	0	—	0.4× / 4.6
Exercises · Caribbean Sea	2	8.3	0	—	10× / 0.2
Quakes · Celebes Sea	2	6	0	—	5.0× / 0.4
Quakes · Gulf of California	2	6	0	—	10× / 0.2
Quakes · Molukka Sea	2	6	0	—	3.3× / 0.6
Derelicts · South China Sea	2	6	0	—	3.3× / 0.6
Debris · North Atlantic Oceannew	2	5.8	0	—	new / 0
Incidents · Tasman Sea	2	3.2	0	—	2.0× / 1
Incidents · The Northwestern Passages	2	1.6	0	—	1.7× / 1.2
Other · Beaufort Seanew	2	1.2	0	—	new / 0
Nav aids · Indian Oceanlong running	1	180.4	6	588	0.7× / 1.4
Surveys · Beaufort Sealong running	1	153.5	6	1,876	5.0× / 0.2
Restricted · North Sealong running	1	150.7	6	1,287	5.0× / 0.2
Nav aids · Arabian Sea	1	104.5	4	156	0.6× / 1.8
Nav aids · Bass Straitlong running	1	66.1	2	912	2.5× / 0.4
Cable ops · Sea of Okhotsk	1	64.6	2	121	1.3× / 0.8
Nav aids · South China Sealong running	1	62.3	2	1,454	new / 0
Exercises · Ionian Sea	1	60	2	267	2.5× / 0.4
Spills · Gulf of Mexico	1	47	0	—	0.4× / 2.6
Other · Arabian Sea	1	44.9	2	89	5.0× / 0.2
Wrecks · North Sealong running	1	39.5	2	778	new / 0
Surveys · Sea of Azov	1	36	2	57	5.0× / 0.2
Surveys · Caribbean Sea	1	32	0	—	5.0× / 0.2
Missiles · Aegean Sea	1	31.8	1	271	5.0× / 0.2
Cable ops · Arctic Ocean	1	31.2	2	50	1.0× / 1
Nav aids · Celtic Sealong running	1	31.2	1	1,070	2.5× / 0.4
Wrecks · English Channel	1	30	1	36	2.5× / 0.4
Surveys · East Siberian Sea	1	29.5	1	29	2.5× / 0.4
Ordnance · Sea of Azov	1	29.5	1	29	new / 0
Nav aids · Bering Sea	1	27.6	1	27	0.8× / 1.2
Incidents · Celtic Sea	1	23.4	1	23	5.0× / 0.2
Incidents · Bay of Biscay	1	22.9	1	35	1.7× / 0.6
Cable ops · Strait of Gibraltar	1	21	0	—	new / 0
Incidents · Gulf of Thailand	1	14.6	1	14	5.0× / 0.2
Incidents · Arabian Sea	1	13.3	0	—	0.6× / 1.8
Incidents · Malacca Strait	1	11.9	0	—	2.5× / 0.4
Nav aids · South Pacific Ocean	1	11.3	1	62	1.0× / 1
Incidents · Baffin Bay	1	10.9	1	10	new / 0
Surveys · English Channel	1	10.2	1	10	new / 0
Derelicts · Arabian Sea	1	9.3	0	—	1.7× / 0.6
Surveys · Gulf of Mexico	1	9.1	1	9	1.3× / 0.8
Towing · Gulf of Mexico	1	9.1	0	—	new / 0
Nav aids · Gulf of Suez	1	8.6	1	8	new / 0
Other · Kara Sea	1	8	0	—	new / 0
Derelicts · Bay of Bengal	1	6.9	1	33	2.5× / 0.4
Other · Bay of Biscay	1	6.5	0	—	new / 0
Incidents · Java Sea	1	6.1	0	—	1.0× / 1
Nav aids · The Northwestern Passages	1	6	1	6	new / 0
Nav aids · English Channel	1	5.4	0	—	0.4× / 2.8
Cable ops · Celtic Sea	1	5.3	0	—	new / 0
Missiles · Laccadive Sea	1	5	0	—	1.7× / 0.6
Missiles · South Pacific Ocean	1	4.9	0	—	2.5× / 0.4
Debris · North Pacific Ocean	1	3.5	0	—	2.5× / 0.4
Quakes · Banda Sea	1	3	0	—	5.0× / 0.2
Quakes · Bismarck Sea	1	3	0	—	1.7× / 0.6
Icebergs · Davis Strait	1	3	0	—	5.0× / 0.2
Containers · English Channel	1	3	0	—	new / 0
Quakes · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Derelicts · North Pacific Ocean	1	3	0	—	0.4× / 2.8
Debris · North Sea	1	3	0	—	5.0× / 0.2
Debris · South China Sea	1	3	0	—	new / 0
Missiles · Arctic Ocean	1	2.6	0	—	1.7× / 0.6
Derelicts · South Atlantic Ocean	1	2.1	0	—	1.3× / 0.8
Surveys · Tasman Sea	1	1.9	0	—	1.7× / 0.6
Cable ops · Sea of Azov	1	1.5	1	1	new / 0
Nav aids · Greenland Sea	1	1.1	0	—	new / 0
Exercises · Adriatic Sea	1	1	0	—	2.5× / 0.4
Spills · Gulf of Alaska	1	1	1	1	5.0× / 0.2
Cable ops · Indian Ocean	1	1	1	32	new / 0
Exercises · Coral Sea	1	0.7	0	—	0.3× / 3.4
Surveys · Inner Seas off the West Coast of Scotland	1	0.7	0	—	2.5× / 0.4
Incidents · Kara Sea	1	0.6	0	—	new / 0
Surveys · North Sea	1	0.6	0	—	0.6× / 1.6
Derelicts · Bay of Biscay	1	0.5	0	—	new / 0
Quakes · South Atlantic Ocean	1	0.3	1	0	1.3× / 0.8
Wrecks · South Pacific Ocean	1	0.1	1	0	5.0× / 0.2
Nav aids · Caribbean Sealong running	0	330	11	716	0.0× / 0.2
Surveys · Arctic Oceanlong running	0	180	6	1,801	0.0× / 0.8
Wrecks · Arabian Sealong running	0	150	5	730	0.0× / 1
Nav aids · Coral Sealong running	0	120	4	530	0.0× / 4
Cable ops · Kara Sea	0	105	3	89	0.0× / 0.6
Wrecks · Solomon Sea	0	90	3	204	— / 0
Nav aids · Bay of Bengal	0	60	2	50	0.0× / 1.2
Other · Caribbean Sea	0	60	2	253	— / 0
Nav aids · Kara Sealong running	0	60	2	1,484	0.0× / 0.4
Nav aids · Mediterranean Sea - Eastern Basin	0	60	2	271	0.0× / 0.2
War risk · Mediterranean Sea - Eastern Basinlong running	0	60	2	1,589	— / 0
Other · North Pacific Oceanlong running	0	60	2	1,262	0.0× / 0.8
Nav aids · Sea of Okhotsklong running	0	60	2	1,380	— / 0
Surveys · The Northwestern Passageslong running	0	60	2	1,150	0.0× / 0.8
Other · Persian Gulf	0	36.3	1	173	0.0× / 0.6
Missiles · Black Sea	0	34.7	0	—	0.0× / 3.8
Cable ops · Baltic Sea	0	30	1	68	— / 0
Cable ops · Barentsz Sea	0	30	1	86	0.0× / 1.4
Surveys · Bay of Bengal	0	30	1	56	— / 0
Surveys · Bering Sea	0	30	1	86	— / 0
Restricted · Black Sealong running	0	30	1	847	— / 0
Cable ops · Caribbean Sea	0	30	1	87	0.0× / 2.2
Volcanic · Caribbean Sea	0	30	1	69	— / 0
Wrecks · Caribbean Sea	0	30	1	351	— / 0
Wrecks · Celtic Sea	0	30	1	30	— / 0
Cable ops · Chukchi Sea	0	30	1	50	— / 0
Surveys · Chukchi Sealong running	0	30	1	371	0.0× / 0.4
Other · Coral Sea	0	30	1	168	0.0× / 0.8
Wrecks · East Siberian Sea	0	30	1	344	— / 0
Nav aids · Eastern China Sealong running	0	30	1	1,324	— / 0
Volcanic · Eastern China Sea	0	30	1	124	— / 0
Wrecks · Gulf of Guinea	0	30	1	132	— / 0
Wrecks · Gulf of Mexico	0	30	1	177	— / 0
Other · Gulf of Suez	0	30	1	100	— / 0
Other · Indian Ocean	0	30	1	47	0.0× / 0.6
Wrecks · Irish Sea and St. George's Channel	0	30	1	103	— / 0
Cable ops · Japan Sea	0	30	1	106	— / 0
Wrecks · Japan Sealong running	0	30	1	510	— / 0
Wrecks · Kara Sea	0	30	1	328	— / 0

Cite: seahazards.com Sea Ledger, 2015-09, 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.