Sea Ledger, August 2015

2015-08-01 to 2015-08-31 · archive

issued: 571
warning-days in force: 10,013
in force at month end: 320
sea × type cells: 245

baseline: same month, previous 5 years (2014-08, 2013-08, 2012-08, 2011-08, 2010-08)

By type

type	issued	warning-days	in force at end
Incidents	130	1,056.1	25
Exercises	115	1,081.1	34
Cable ops	59	1,436.5	50
Nav aids	54	2,493	81
Icebergs	39	51.1	2
Quakes	30	94.2	0
Derelicts	29	206.2	6
Other	27	711.9	24
Surveys	25	1,258.4	43
Missiles	25	146.2	4
Spills	13	134	7
Debris	8	24.3	1
Towing	5	29.2	1
Wrecks	4	720.8	24
Piracy	3	23.8	1
Restricted	2	228.1	7
Structures	2	97.9	4
Ordnance	1	65.2	1
War risk	0	62	2
Volcanic	0	93	3

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · Labrador Sea	34	36.1	2	32	1.9× / 17.4
Exercises · North Pacific Oceansurge	29	113.4	3	35	3.0× / 9.6
Incidents · Mediterranean Sea - Eastern Basinsurge	26	167.2	0	—	4.2× / 6.2
Incidents · South China Sea	23	158.4	4	53	1.7× / 13.8
Cable ops · North Seasurge	17	137.6	3	150	3.9× / 4.4
Exercises · Yellow Seasurge	16	136.3	4	33	2.0× / 7.8
Incidents · North Atlantic Ocean	14	109.9	4	40	1.5× / 9.2
Quakes · South Pacific Ocean	12	39.1	0	—	1.4× / 8.6
Exercises · South Atlantic Ocean	11	62.1	2	28	1.5× / 7.4
Incidents · North Pacific Ocean	11	47.6	0	—	0.4× / 27
Nav aids · North Sealong running	10	93.1	4	995	1.1× / 9
Exercises · Black Seasurge	10	84.5	2	31	2.6× / 3.8
Cable ops · South China Seasurge	9	242.8	12	65	2.5× / 3.6
Cable ops · Gulf of Mexicosurge	9	194.3	6	65	9.0× / 1
Cable ops · North Atlantic Ocean	8	220.5	5	82	1.0× / 7.8
Missiles · North Pacific Ocean	7	36.9	0	—	1.1× / 6.4
Other · North Atlantic Oceansurgelong running	6	61.8	3	658	6.0× / 1
Nav aids · English Channelsurge	6	47.9	1	48	3.8× / 1.6
Incidents · South Atlantic Ocean	6	29.9	2	37	1.1× / 5.6
Exercises · Mediterranean Sea - Eastern Basin	6	15.6	1	32	1.9× / 3.2
Exercises · North Atlantic Oceansurge	6	7.2	1	16	4.3× / 1.4
Incidents · Coral Seasurge	6	0.8	0	—	2.0× / 3
Nav aids · Indian Oceanlong running	5	168	6	558	1.7× / 3
Surveys · Indian Oceansurge	5	55.9	2	233	25× / 0.2
Exercises · Bay of Bengal	5	45.9	1	49	1.0× / 5
Derelicts · Bay of Bengalnew	5	29.7	1	23	new / 0
Missiles · North Atlantic Ocean	5	22.8	1	25	1.3× / 4
Missiles · South Pacific Oceansurge	5	16.1	0	—	6.3× / 0.8
Quakes · North Pacific Ocean	5	15	0	—	0.6× / 8.4
Quakes · Solomon Seasurge	5	15	0	—	6.3× / 0.8
Nav aids · Coral Sealong running	4	127.6	4	500	1.3× / 3.2
Incidents · Gulf of Mexico	4	88.6	3	59	1.8× / 2.2
Other · North Seasurgelong running	4	43.4	1	703	10× / 0.4
Nav aids · Irish Sea and St. George's Channel	4	36.3	1	49	1.5× / 2.6
Derelicts · South Pacific Oceanlong running	4	35.6	1	1,160	1.8× / 2.2
Incidents · Indian Ocean	4	34.7	1	37	0.4× / 10.6
Exercises · Gulf of Mexicosurge	4	29	0	—	2.9× / 1.4
Spills · Gulf of Mexico	4	27	4	43	1.2× / 3.4
Incidents · Bay of Bengalsurge	4	13.3	2	6	2.5× / 1.6
Incidents · South Pacific Ocean	4	13.1	1	25	0.4× / 10
Missiles · Black Seasurge	4	12	2	10	2.5× / 1.6
Icebergs · Laptev Seanew	4	12	0	—	new / 0
Towing · Gulf of Mexiconew	4	11.8	1	18	new / 0
Derelicts · Caribbean Seasurge	4	9.3	1	30	4.0× / 1
Nav aids · South Atlantic Ocean	3	473.1	14	242	0.4× / 7
Nav aids · North Atlantic Oceanlong running	3	162	6	879	0.6× / 5
Incidents · Mediterranean Sea - Western Basinsurge	3	90.8	3	74	3.8× / 0.8
Cable ops · Kara Seasurge	3	90.6	4	59	3.0× / 1
Exercises · South China Sea	3	84.1	3	41	0.6× / 5
Exercises · Philippine Sea	3	70.8	2	42	0.5× / 5.6
Other · Mediterranean Sea - Eastern Basinsurge	3	46.6	1	29	2.5× / 1.2
Derelicts · North Atlantic Oceanlong running	3	46.1	1	376	1.1× / 2.8
Incidents · Bay of Biscaysurge	3	45.2	1	43	5.0× / 0.6
Spills · Gulf of Alaskanew	3	42	0	—	new / 0
Exercises · Arabian Sea	3	40	1	33	0.9× / 3.2
Spills · North Atlantic Ocean	3	36	2	40	1.0× / 3
Nav aids · Bay of Bengalsurge	3	33.9	2	21	3.8× / 0.8
Missiles · Barentsz Sea	3	22.3	0	—	1.1× / 2.8
Derelicts · South China Seasurge	3	19.9	0	—	3.8× / 0.8
Incidents · Ionian Seanew	3	17.7	0	—	new / 0
Incidents · Adriatic Seasurge	3	16.3	0	—	3.8× / 0.8
Exercises · Sea of Okhotsknew	3	10.2	2	5	new / 0
Derelicts · North Pacific Ocean	3	10.1	0	—	1.1× / 2.6
Other · Gulf of Mexiconew	3	6.4	0	—	new / 0
Surveys · North Atlantic Oceanlong running	2	225	9	454	0.5× / 4
Cable ops · Sea of Okhotsk	2	112.2	4	91	2.5× / 0.8
Surveys · South Atlantic Oceanlong running	2	88.6	2	397	0.7× / 2.8
Nav aids · Davis Strait	2	67.2	2	78	10× / 0.2
Derelicts · Arabian Sea	2	37	1	185	2.5× / 0.8
Cable ops · Arabian Seanew	2	31.9	1	38	new / 0
Exercises · Laccadive Sea	2	31	1	32	0.7× / 2.8
Surveys · Sea of Azov	2	29.8	1	27	10× / 0.2
Wrecks · English Channel	2	27	1	44	10× / 0.2
Exercises · South Pacific Ocean	2	22.1	0	—	0.6× / 3.4
Incidents · Ceram Seanew	2	19.2	0	—	new / 0
Incidents · Arabian Sea	2	18.1	1	36	2.5× / 0.8
Incidents · Solomon Sea	2	11.8	0	—	3.3× / 0.6
Exercises · Baltic Sea	2	11.6	1	32	1.0× / 2
Exercises · Caribbean Sea	2	9	0	—	5.0× / 0.4
Nav aids · Beaufort Sea	2	8	0	—	5.0× / 0.4
Wrecks · Celtic Seanew	2	7.3	1	7	new / 0
Incidents · Caribbean Sea	2	7.1	0	—	0.5× / 4.4
Debris · Indian Ocean	2	6	0	—	10× / 0.2
Quakes · Indian Ocean	2	6	0	—	1.0× / 2
Derelicts · Mediterranean Sea - Eastern Basin	2	6	0	—	1.0× / 2
Debris · North Atlantic Ocean	2	6	0	—	5.0× / 0.4
Incidents · Philippine Sea	2	3.8	0	—	1.1× / 1.8
Restricted · South China Seanew	2	3.2	0	—	new / 0
Nav aids · Caribbean Sealong running	1	339.6	11	686	5.0× / 0.2
Exercises · Aegean Sea	1	216.7	7	241	new / 0
Nav aids · Gulf of Mexicolong running	1	173.3	6	562	0.5× / 2.2
Other · South China Sealong running	1	95	2	740	1.3× / 0.8
Surveys · Black Sea	1	79.2	3	48	0.8× / 1.2
Nav aids · North Pacific Oceanlong running	1	75.2	1	416	0.4× / 2.4
Other · North Pacific Oceanlong running	1	69.5	2	1,232	5.0× / 0.2
Nav aids · Bass Straitlong running	1	63.4	2	882	1.7× / 0.6
Other · English Channel	1	61.2	2	84	new / 0
Cable ops · Caribbean Sea	1	45	1	57	0.8× / 1.2
Cable ops · Mediterranean Sea - Eastern Basin	1	37.8	1	83	0.6× / 1.6
Other · Caribbean Sea	1	34.3	2	223	new / 0
Surveys · The Northwestern Passageslong running	1	34	2	1,120	0.4× / 2.4
Nav aids · Celtic Sealong running	1	33.6	1	1,040	0.6× / 1.6
Nav aids · Great Australian Bight	1	32	1	180	1.3× / 0.8
Surveys · Mediterranean Sea - Eastern Basin	1	28.5	1	28	5.0× / 0.2
Surveys · Bay of Bengal	1	26.3	1	26	new / 0
Incidents · Japan Sea	1	26	0	—	5.0× / 0.2
Surveys · Gulf of Mexico	1	23.8	0	—	5.0× / 0.2
Cable ops · Chukchi Sea	1	20.7	1	20	new / 0
Cable ops · Arctic Ocean	1	20.3	1	20	new / 0
Surveys · Sea of Okhotsk	1	19.6	1	19	2.5× / 0.4
Surveys · Yellow Sea	1	19.6	1	19	2.5× / 0.4
Other · Indian Ocean	1	17.2	1	17	5.0× / 0.2
Surveys · North Sea	1	14.7	0	—	0.8× / 1.2
Spills · North Pacific Ocean	1	14	0	—	0.8× / 1.2
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	14	0	—	1.3× / 0.8
Piracy · Malacca Strait	1	13.7	0	—	5.0× / 0.2
Cable ops · Gulf of Thailand	1	13.5	1	13	2.5× / 0.4
Structures · South China Sea	1	13.5	1	13	new / 0
Surveys · Arabian Sea	1	13.4	1	13	new / 0
Cable ops · Mediterranean Sea - Western Basin	1	13.4	1	13	new / 0
Other · Sea of Azov	1	13.4	1	13	new / 0
Cable ops · Gulf of Suez	1	12.6	1	12	5.0× / 0.2
Surveys · Andaman or Burma Sea	1	11.5	1	11	new / 0
Towing · South China Sea	1	11.4	0	—	new / 0
Cable ops · Celtic Sea	1	11	1	33	1.3× / 0.8
Ordnance · North Sea	1	10.4	1	10	new / 0
Surveys · Labrador Sea	1	10	0	—	5.0× / 0.2
Incidents · Java Sea	1	9.3	0	—	1.7× / 0.6
Exercises · Barentsz Sea	1	8.5	0	—	new / 0
Surveys · Gulf of Suez	1	7.6	1	7	new / 0
Nav aids · Laptev Sea	1	7.5	1	7	new / 0
Piracy · South China Sea	1	6.8	0	—	0.5× / 2.2
Surveys · Davis Strait	1	6.6	0	—	new / 0
Exercises · Bering Sea	1	6.1	0	—	0.7× / 1.4
Derelicts · South Atlantic Ocean	1	5.8	0	—	0.7× / 1.4
Exercises · Red Sea	1	5.4	0	—	new / 0
Missiles · Laccadive Sea	1	5.1	0	—	1.7× / 0.6
Quakes · Coral Sea	1	4	0	—	0.3× / 3.8
Incidents · Banda Sea	1	3.8	0	—	5.0× / 0.2
Nav aids · Tasman Sea	1	3.8	0	—	0.5× / 2
Exercises · Indian Ocean	1	3.3	1	3	0.5× / 2
Piracy · Indian Ocean	1	3.3	1	3	1.7× / 0.6
Debris · Arabian Sea	1	3	0	—	new / 0
Quakes · Arabian Sea	1	3	0	—	new / 0
Debris · Celtic Sea	1	3	0	—	new / 0
Icebergs · Kara Sea	1	3	0	—	new / 0
Quakes · Molukka Sea	1	3	0	—	2.5× / 0.4
Quakes · North Atlantic Ocean	1	3	0	—	1.0× / 1
Debris · North Sea	1	3	0	—	new / 0
Quakes · Philippine Sea	1	3	0	—	0.3× / 3
Quakes · South Atlantic Ocean	1	3	0	—	0.6× / 1.6
Derelicts · Tasman Sea	1	3	0	—	1.7× / 0.6
Cable ops · Indian Ocean	1	2.6	1	2	1.7× / 0.6
Exercises · Celtic Sea	1	2.5	0	—	new / 0
Exercises · Coral Sea	1	2.3	0	—	0.4× / 2.4
Derelicts · Gulf of Mexico	1	2.1	1	2	1.3× / 0.8
Structures · North Sea	1	2	1	1	5.0× / 0.2
Other · Davis Strait	1	1.9	1	1	2.5× / 0.4
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	1.8	0	—	1.3× / 0.8
Other · Tasman Sea	1	1.7	0	—	5.0× / 0.2
Exercises · Gulf of California	1	1.5	0	—	5.0× / 0.2
Incidents · English Channel	1	1.3	1	1	new / 0
Nav aids · Bay of Biscay	1	1.1	0	—	new / 0
Debris · North Pacific Ocean	1	1.1	1	1	1.7× / 0.6
Spills · Philippine Sea	1	1	1	1	new / 0
Other · Celebes Sea	1	0.5	0	—	new / 0
Surveys · English Channel	1	0.5	0	—	5.0× / 0.2
Other · Arafura Sea	1	0.3	0	—	5.0× / 0.2
Nav aids · Strait of Gibraltar	1	0.3	0	—	new / 0
Other · The Northwestern Passages	1	0.2	0	—	1.7× / 0.6
Nav aids · Adriatic Sea	1	0	1	0	new / 0
Incidents · Celtic Sea	1	0	0	—	5.0× / 0.2
Incidents · Tasman Sea	1	0	0	—	1.0× / 1
Surveys · Arctic Oceanlong running	0	186	6	1,771	0.0× / 1
Wrecks · Arabian Sealong running	0	155	5	700	0.0× / 1.2
Surveys · Beaufort Sealong running	0	155	5	1,846	0.0× / 0.4
Restricted · North Sealong running	0	155	5	1,257	0.0× / 1.2
Nav aids · Arabian Sea	0	93	3	126	0.0× / 0.6
Wrecks · Solomon Sea	0	93	3	174	0.0× / 0.2
Nav aids · South China Sealong running	0	72.5	2	1,477	0.0× / 0.2
Cable ops · Norwegian Sea	0	71.8	1	91	0.0× / 1.4
Other · Arabian Sea	0	62	2	59	0.0× / 0.8
Exercises · Ionian Sea	0	62	2	237	0.0× / 0.2
Nav aids · Kara Sealong running	0	62	2	1,454	— / 0
Nav aids · Mediterranean Sea - Eastern Basin	0	62	2	241	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	1,559	— / 0
Wrecks · North Atlantic Oceanlong running	0	62	2	376	0.0× / 0.6
Other · Persian Gulf	0	62	2	143	0.0× / 0.6
Nav aids · Sea of Okhotsklong running	0	62	2	1,350	0.0× / 0.4
Surveys · South China Sea	0	61	1	70	0.0× / 0.6
Ordnance · Sea of Azov	0	54.8	0	—	— / 0
Structures · Persian Gulf	0	51.4	1	61	— / 0
Incidents · Davis Strait	0	51.1	0	—	0.0× / 1.6
Restricted · Black Sealong running	0	38.9	1	817	0.0× / 0.2
Nav aids · South Pacific Ocean	0	37.8	1	44	0.0× / 2.8
Incidents · Laccadive Sea	0	31.4	1	35	0.0× / 1
Missiles · Aegean Sea	0	31	1	241	— / 0
Cable ops · Baltic Sea	0	31	1	38	— / 0
Cable ops · Barentsz Sea	0	31	1	56	0.0× / 0.6
Surveys · Bering Sea	0	31	1	56	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2015-08, 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.