Sea Ledger, June 2011

2011-06-01 to 2011-06-30 · archive

issued: 387
warning-days in force: 7,032
in force at month end: 229
sea × type cells: 185

baseline: same month, previous 5 years (2010-06, 2009-06, 2008-06, 2007-06, 2006-06)

By type

type	issued	warning-days	in force at end
Exercises	75	792.8	21
Incidents	65	1,039	28
Nav aids	61	1,274	43
Cable ops	46	950.8	32
Quakes	39	109.3	5
Missiles	23	177.9	10
Derelicts	22	75	4
Surveys	16	1,201.2	42
Piracy	12	114	1
Other	6	362.4	13
Containers	6	17.9	0
Ordnance	6	105	3
Wrecks	5	457.2	17
Spills	4	56	2
Debris	1	5.5	0
Structures	0	60	2
Volcanic	0	54.4	1
Restricted	0	30	1
War risk	0	149.4	4

By sea and type · 185 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceanlong running	23	176.9	7	964	1.0× / 23.4
Incidents · North Pacific Ocean	17	158.6	5	68	1.7× / 10
Quakes · South Pacific Ocean	14	33.8	4	29	1.7× / 8.2
Exercises · North Pacific Ocean	13	72.2	1	34	1.2× / 10.6
Quakes · North Pacific Oceansurge	12	35.7	1	27	2.2× / 5.4
Incidents · South China Seasurge	9	63.6	2	46	4.5× / 2
Exercises · Yellow Seasurge	8	54	2	36	2.0× / 4
Nav aids · North Pacific Oceansurge	7	169.4	6	185	3.9× / 1.8
Nav aids · North Sea	7	61.8	2	109	0.8× / 8.4
Surveys · North Atlantic Oceansurge	7	44.3	3	27	2.9× / 2.4
Exercises · South Pacific Oceansurge	7	35.2	1	32	3.5× / 2
Incidents · South Atlantic Ocean	6	102.5	2	72	1.4× / 4.4
Exercises · South China Seasurge	6	96.4	4	30	6.0× / 1
Incidents · Philippine Sea	6	61.9	4	29	1.4× / 4.2
Incidents · South Pacific Ocean	6	57.6	2	60	1.1× / 5.6
Exercises · Japan Sea	6	56.4	0	—	0.8× / 7.2
Missiles · North Pacific Ocean	6	46.1	1	32	0.9× / 6.6
Exercises · Laccadive Sea	6	39.3	2	37	1.1× / 5.2
Exercises · South Atlantic Ocean	6	38.3	1	32	1.4× / 4.4
Containers · North Pacific Oceannew	6	17.9	0	—	new / 0
Nav aids · Coral Seasurge	6	10.8	1	27	2.7× / 2.2
Nav aids · English Channel	5	145.8	5	142	1.6× / 3.2
Nav aids · North Atlantic Oceanlong running	5	82.6	2	442	1.3× / 4
Nav aids · Irish Sea and St. George's Channelsurge	5	63.5	2	124	2.3× / 2.2
Exercises · Bay of Bengal	5	33.5	1	37	0.9× / 5.8
Missiles · Barentsz Seanew	5	30.1	2	19	new / 0
Piracy · Arabian Seasurge	5	28	1	31	25× / 0.2
Derelicts · North Pacific Oceansurge	5	15	0	—	3.1× / 1.6
Nav aids · South Atlantic Oceanlong running	4	310.6	9	1,044	0.7× / 5.6
Exercises · Philippine Sea	4	89.5	1	35	1.1× / 3.8
Nav aids · South Pacific Ocean	4	73.4	2	126	1.4× / 2.8
Incidents · Indian Ocean	4	60.3	2	35	1.3× / 3
Nav aids · Gulf of Mexico	4	35.1	2	89	1.7× / 2.4
Cable ops · North Atlantic Ocean	4	25.5	1	58	0.9× / 4.4
Derelicts · South Pacific Oceansurge	4	24.9	0	—	5.0× / 0.8
Missiles · North Atlantic Oceansurge	4	19.2	3	14	6.7× / 0.6
Cable ops · Strait of Gibraltarnew	4	9.9	0	—	new / 0
Nav aids · Inner Seas off the West Coast of Scotland	4	6.9	0	—	1.2× / 3.4
Cable ops · Bay of Bengalsurge	3	82.4	0	—	3.0× / 1
Exercises · Arabian Sea	3	73.2	2	62	1.9× / 1.6
Piracy · Red Seasurge	3	37.4	0	—	3.0× / 1
Quakes · Indian Ocean	3	9.8	0	—	1.5× / 2
Quakes · Coral Sea	3	9	0	—	1.3× / 2.4
Derelicts · South China Seasurge	3	3.7	0	—	15× / 0.2
Derelicts · Arabian Seasurge	3	1.9	2	1	3.0× / 1
Exercises · Aegean Sea	2	157.4	5	182	1.3× / 1.6
Incidents · North Atlantic Ocean	2	150.4	3	73	0.2× / 10.6
Cable ops · South China Sea	2	122.9	5	89	0.9× / 2.2
Wrecks · Arabian Sealong running	2	102.3	4	561	10× / 0.2
Surveys · South Atlantic Ocean	2	85.9	3	64	3.3× / 0.6
Nav aids · Arabian Sealong running	2	62.3	3	561	1.7× / 1.2
Other · North Pacific Ocean	2	60	2	105	5.0× / 0.4
Cable ops · North Sea	2	58.4	2	42	1.0× / 2
Surveys · Black Sea	2	45.5	2	31	10× / 0.2
Wrecks · Persian Gulf	2	40.4	2	188	10× / 0.2
Incidents · Bering Seanew	2	25.9	2	21	new / 0
Piracy · Indian Oceannew	2	18.7	0	—	new / 0
Ordnance · Philippine Sea	2	16.8	0	—	10× / 0.2
Exercises · North Atlantic Ocean	2	15.7	1	17	0.3× / 6
Exercises · Baltic Sea	2	8.1	0	—	1.1× / 1.8
Nav aids · Laccadive Sea	2	7.4	1	15	3.3× / 0.6
Surveys · Bay of Biscaynew	2	7	0	—	new / 0
Missiles · Arctic Oceannew	2	6.2	1	6	new / 0
Exercises · Gulf of Alaska	2	5.8	0	—	10× / 0.2
Derelicts · Arafura Sea	2	4.5	1	18	5.0× / 0.4
Nav aids · Gulf of Alaska	2	2	0	—	2.0× / 1
Other · Inner Seas off the West Coast of Scotland	2	1.2	0	—	5.0× / 0.4
Incidents · Great Australian Bightnew	2	0.9	0	—	new / 0
Incidents · Coral Sea	2	0.1	0	—	1.7× / 1.2
Incidents · Gulf of Mexico	1	110.5	3	72	2.5× / 0.4
Cable ops · Persian Gulf	1	86.5	3	169	1.3× / 0.8
Wrecks · North Sealong running	1	44.5	2	405	5.0× / 0.2
Nav aids · Mediterranean Sea - Eastern Basin	1	33.5	2	254	1.7× / 0.6
Other · North Sea	1	32.6	2	115	2.5× / 0.4
Cable ops · Norwegian Sea	1	30	1	72	0.8× / 1.2
Surveys · Mozambique Channel	1	29.9	1	58	2.5× / 0.4
Cable ops · Eastern China Sea	1	27.8	1	27	2.5× / 0.4
Spills · North Atlantic Ocean	1	27	0	—	0.6× / 1.8
Ordnance · Sea of Azov	1	22.9	0	—	new / 0
Incidents · Singapore Strait	1	21.9	1	21	new / 0
Piracy · Gulf of Aden	1	21.3	0	—	1.3× / 0.8
Cable ops · Celtic Sea	1	15.4	1	15	0.4× / 2.8
Incidents · Gulf of Guinea	1	14.9	0	—	new / 0
Missiles · South Atlantic Ocean	1	14.8	0	—	5.0× / 0.2
Spills · Gulf of Mexico	1	14	0	—	0.2× / 4.6
Other · Sea of Okhotsk	1	13.6	1	13	5.0× / 0.2
Spills · Bering Sea	1	12	1	37	new / 0
Incidents · Tasman Sea	1	11	0	—	0.6× / 1.8
Missiles · Arabian Sea	1	10.5	1	10	new / 0
Incidents · Ionian Sea	1	9	0	—	5.0× / 0.2
Piracy · Singapore Strait	1	8.6	0	—	2.5× / 0.4
Missiles · Japan Sea	1	5.6	1	5	2.5× / 0.4
Debris · Indian Ocean	1	5.5	0	—	new / 0
Exercises · Indian Ocean	1	5.4	0	—	1.7× / 0.6
Missiles · South Pacific Ocean	1	5.4	0	—	new / 0
Missiles · Laccadive Sea	1	5.3	0	—	5.0× / 0.2
Exercises · Andaman or Burma Sea	1	4.9	0	—	5.0× / 0.2
Missiles · Bay of Bengal	1	4.7	0	—	5.0× / 0.2
Surveys · Sea of Okhotsk	1	4.6	1	4	2.5× / 0.4
Cable ops · Gulf of Guinea	1	4	0	—	2.5× / 0.4
Nav aids · Davis Strait	1	3.8	0	—	new / 0
Derelicts · Tyrrhenian Sea	1	3.2	0	—	5.0× / 0.2
Quakes · Bay of Bengal	1	3	0	—	0.7× / 1.4
Quakes · Bismarck Sea	1	3	0	—	0.8× / 1.2
Derelicts · Indian Ocean	1	3	0	—	0.7× / 1.4
Quakes · Molukka Sea	1	3	0	—	2.5× / 0.4
Derelicts · North Atlantic Ocean	1	3	0	—	0.4× / 2.6
Spills · North Pacific Ocean	1	3	1	43	0.7× / 1.4
Quakes · Red Sea	1	3	0	—	new / 0
Quakes · Savu Sea	1	3	0	—	new / 0
Derelicts · Sea of Okhotsk	1	3	0	—	5.0× / 0.2
Incidents · Sea of Okhotsk	1	3	0	—	new / 0
Quakes · Solomon Sea	1	3	0	—	0.5× / 2.2
Quakes · South Atlantic Ocean	1	3	0	—	0.6× / 1.6
Ordnance · Black Sea	1	2.5	1	2	new / 0
Derelicts · South Atlantic Ocean	1	2.4	1	2	1.7× / 0.6
Surveys · Coral Sea	1	1.7	0	—	new / 0
Ordnance · Arabian Sea	1	1.5	0	—	new / 0
Cable ops · Black Sea	1	1.5	1	1	5.0× / 0.2
Cable ops · Mediterranean Sea - Western Basin	1	1.5	1	1	1.3× / 0.8
Cable ops · Sea of Marmara	1	1.5	1	1	new / 0
Ordnance · North Pacific Ocean	1	1.3	0	—	2.5× / 0.4
Exercises · Adriatic Sea	1	0.9	0	—	1.7× / 0.6
Nav aids · Bristol Channel	1	0.7	0	—	5.0× / 0.2
Incidents · Arabian Sea	1	0.1	0	—	0.6× / 1.6
Incidents · Bass Strait	1	0	0	—	new / 0
Nav aids · Indian Ocean	1	0	0	—	0.8× / 1.2
Incidents · Mozambique Channel	1	0	0	—	5.0× / 0.2
Surveys · Arctic Oceanlong running	0	450	15	1,713	— / 0
War risk · Mediterranean Sea - Eastern Basin	0	149.4	4	55	— / 0
Surveys · Beaufort Sea	0	120	4	363	— / 0
Incidents · Caribbean Sea	0	99.5	1	72	0.0× / 0.2
Nav aids · Celtic Sea	0	90	3	113	0.0× / 1.4
Surveys · Laptev Sealong running	0	90	3	1,864	— / 0
Wrecks · South China Sea	0	90	3	282	0.0× / 0.2
Wrecks · The Northwestern Passages	0	90	3	363	— / 0
Cable ops · Gulf of Mexico	0	80	2	37	0.0× / 2.2
Surveys · Baffin Bay	0	60	2	363	— / 0
Cable ops · Tasman Sea	0	56	1	42	0.0× / 0.4
Surveys · Persian Gulf	0	47.4	1	80	— / 0
Other · Persian Gulf	0	45	1	317	— / 0
Incidents · Andaman or Burma Sea	0	40.4	1	41	— / 0
Missiles · Aegean Sea	0	30	1	182	— / 0
Nav aids · Andaman or Burma Sea	0	30	1	52	0.0× / 0.2
Other · Arctic Ocean	0	30	1	361	— / 0
Cable ops · Barentsz Sea	0	30	1	30	— / 0
Other · Bay of Bengal	0	30	1	66	— / 0
Surveys · Bay of Bengal	0	30	1	35	0.0× / 0.2
Surveys · Bering Sea	0	30	1	320	— / 0
Cable ops · Caribbean Sea	0	30	1	321	0.0× / 0.4
Nav aids · Caribbean Sea	0	30	1	37	0.0× / 0.4
Surveys · Chukchi Sea	0	30	1	291	— / 0
Surveys · Davis Strait	0	30	1	41	— / 0
Structures · Indian Ocean	0	30	1	110	— / 0
Surveys · Indian Ocean	0	30	1	150	0.0× / 0.4
Ordnance · Ionian Sea	0	30	1	62	0.0× / 0.4
Wrecks · Laccadive Sea	0	30	1	90	— / 0
Other · Mediterranean Sea - Eastern Basin	0	30	1	83	0.0× / 0.6
Other · North Atlantic Ocean	0	30	1	49	0.0× / 1.6
Cable ops · North Pacific Ocean	0	30	1	140	— / 0
Ordnance · North Sealong running	0	30	1	972	0.0× / 1
Structures · North Sea	0	30	1	142	0.0× / 0.8
Surveys · North Sea	0	30	1	100	0.0× / 1
Restricted · Persian Gulf	0	30	1	210	— / 0
Volcanic · Philippine Sealong running	0	30	1	489	— / 0
Cable ops · Red Sea	0	30	1	115	0.0× / 0.2
Nav aids · Red Sea	0	30	1	164	— / 0
Surveys · Sea of Azov	0	30	1	34	— / 0
Other · South Atlantic Ocean	0	30	1	49	0.0× / 0.4
Wrecks · South Atlantic Oceanlong running	0	30	1	414	— / 0
Other · South China Sealong running	0	30	1	1,079	0.0× / 0.2
Cable ops · South Pacific Ocean	0	30	1	37	0.0× / 0.2
Wrecks · South Pacific Ocean	0	30	1	118	— / 0
Other · The Northwestern Passages	0	30	1	334	— / 0
Incidents · Laccadive Sea	0	29.5	0	—	— / 0
Nav aids · Gulf of Suez	0	24.4	0	—	0.0× / 0.2
Volcanic · South Pacific Ocean	0	24.4	0	—	— / 0
Cable ops · Mediterranean Sea - Eastern Basin	0	20.6	0	—	0.0× / 1.8
Incidents · Bay of Biscay	0	17.4	0	—	0.0× / 0.2
Derelicts · Caribbean Sea	0	10.4	0	—	0.0× / 0.6
Surveys · Tasman Sea	0	4.9	0	—	— / 0
Exercises · Mediterranean Sea - Eastern Basin	0	3.6	0	—	0.0× / 1.2
Exercises · Alboran Sea	0	3	0	—	0.0× / 0.2
Cable ops · Arabian Sea	0	0	0	—	0.0× / 1
Ordnance · Mediterranean Sea - Eastern Basin	0	0	0	—	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2011-06, 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.