Sea Ledger, May 2010

2010-05-01 to 2010-05-31 · archive

issued: 414
warning-days in force: 7,789
in force at month end: 261
sea × type cells: 194

baseline: same month, previous 5 years (2009-05, 2008-05, 2007-05, 2006-05, 2005-05)

By type

type	issued	warning-days	in force at end
Exercises	79	721.4	27
Incidents	70	996.6	41
Cable ops	64	1,073	39
Nav aids	52	1,108.2	37
Quakes	32	98.7	2
Piracy	28	305	8
Missiles	23	157.2	4
Derelicts	14	44.1	0
Surveys	13	2,090	66
Other	11	311.8	12
Spills	10	122.2	3
Ordnance	4	168.9	5
Debris	4	43	1
Structures	3	123.7	3
Wrecks	2	354.5	10
Icebergs	2	5.7	1
Towing	2	31	1
Containers	1	3	0
Volcanic	0	31	1

By sea and type · 194 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceanlong running	20	306.7	10	569	0.8× / 25.6
Incidents · North Atlantic Oceansurge	20	258	11	37	5.3× / 3.8
Piracy · Indian Oceansurge	17	120.2	4	50	43× / 0.4
Nav aids · South Atlantic Oceansurgelong running	12	334.1	12	649	4.3× / 2.8
Missiles · North Atlantic Oceannew	12	65.4	1	42	new / 0
Quakes · South Pacific Ocean	11	33	0	—	1.0× / 11.4
Exercises · South Atlantic Ocean	10	89.4	3	33	1.5× / 6.6
Missiles · North Pacific Ocean	10	85.7	3	61	1.7× / 6
Exercises · Japan Seasurge	10	66.8	3	33	3.9× / 2.6
Nav aids · North Seasurgelong running	9	105	2	445	2.4× / 3.8
Cable ops · Gulf of Mexicosurge	8	164.5	5	213	20× / 0.4
Exercises · Philippine Seasurge	8	53.5	3	33	5.0× / 1.6
Spills · Gulf of Mexico	7	75.2	2	41	1.6× / 4.4
Exercises · North Pacific Ocean	7	63.4	2	35	0.6× / 11.4
Incidents · North Pacific Ocean	6	230.5	6	70	0.6× / 10
Exercises · North Atlantic Ocean	6	53.5	1	55	0.6× / 9.6
Exercises · Bay of Bengal	6	43.1	2	31	1.0× / 6
Incidents · South Atlantic Ocean	6	40.5	5	21	1.6× / 3.8
Cable ops · North Atlantic Ocean	6	25.6	2	42	1.8× / 3.4
Nav aids · Gulf of Mexicosurge	6	13.6	0	—	2.1× / 2.8
Incidents · Caribbean Seanew	5	122.7	5	59	new / 0
Cable ops · Arabian Seasurge	5	119.2	4	51	2.8× / 1.8
Cable ops · Bay of Bengalsurge	5	78.4	2	72	3.1× / 1.6
Exercises · Arabian Sea	5	40.4	2	30	1.4× / 3.6
Exercises · Yellow Sea	5	40	1	33	1.3× / 4
Exercises · Laccadive Sea	5	35.4	1	29	0.8× / 6.4
Cable ops · Mediterranean Sea - Eastern Basin	4	85.5	4	88	1.2× / 3.4
Piracy · Arabian Seanew	4	79.8	0	—	new / 0
Incidents · South Pacific Ocean	4	64.4	2	77	0.5× / 8.2
Incidents · Gulf of Mexiconew	4	61.6	3	56	new / 0
Piracy · Gulf of Adensurge	4	25.6	2	46	20× / 0.2
Derelicts · South Atlantic Ocean	4	14.1	0	—	1.8× / 2.2
Quakes · Coral Seasurge	4	12	0	—	2.5× / 1.6
Nav aids · North Atlantic Oceanlong running	3	99	3	457	1.3× / 2.4
Nav aids · Irish Sea and St. George's Channellong running	3	68.7	3	589	1.1× / 2.8
Other · South Atlantic Oceansurge	3	28.2	2	22	2.5× / 1.2
Incidents · Philippine Sea	3	24	1	21	0.8× / 3.6
Quakes · North Pacific Ocean	3	9	0	—	0.7× / 4.6
Quakes · Philippine Seasurge	3	9	0	—	2.1× / 1.4
Exercises · Mediterranean Sea - Western Basinsurge	3	6.6	0	—	2.5× / 1.2
Nav aids · Inner Seas off the West Coast of Scotland	3	1.5	0	—	0.8× / 3.8
Incidents · Tasman Sea	3	1.4	0	—	1.9× / 1.6
Surveys · North Pacific Ocean	2	87.2	3	145	5.0× / 0.4
Nav aids · Gulf of Suezlong running	2	83.5	3	514	10× / 0.2
Ordnance · Gulf of Adennewlong running	2	65.5	2	441	new / 0
Nav aids · English Channel	2	65	3	298	0.8× / 2.6
Exercises · South China Sea	2	63.7	2	33	5.0× / 0.4
Other · Mediterranean Sea - Eastern Basin	2	61.1	2	139	1.7× / 1.2
Surveys · Mediterranean Sea - Eastern Basin	2	52.9	1	54	0.8× / 2.4
Nav aids · Arabian Sea	2	50.5	3	166	2.0× / 1
Cable ops · South China Sea	2	47.7	2	117	1.1× / 1.8
Structures · Black Seanew	2	43.2	1	30	new / 0
Cable ops · Gulf of Guinea	2	42.8	2	49	10× / 0.2
Nav aids · Celtic Sea	2	39.3	1	57	2.5× / 0.8
Cable ops · Tasman Sea	2	38.8	1	90	3.3× / 0.6
Piracy · South China Sea	2	36.8	0	—	10× / 0.2
Spills · North Atlantic Ocean	2	32	0	—	1.0× / 2
Other · North Atlantic Ocean	2	26.7	2	16	1.0× / 2
Incidents · South China Sea	2	21	1	20	0.9× / 2.2
Exercises · Gulf of Mexico	2	17.5	0	—	2.0× / 1
Surveys · North Atlantic Ocean	2	15.4	0	—	1.0× / 2
Incidents · Arabian Sea	2	9	0	—	5.0× / 0.4
Exercises · Baltic Sea	2	8.7	1	19	2.0× / 1
Exercises · Adriatic Sea	2	8.6	1	31	10× / 0.2
Quakes · Indian Ocean	2	8	0	—	0.4× / 5.6
Derelicts · Bay of Bengal	2	6	0	—	5.0× / 0.4
Derelicts · North Atlantic Ocean	2	6	0	—	0.8× / 2.4
Quakes · North Atlantic Ocean	2	6	0	—	2.5× / 0.8
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	2	4.7	0	—	10× / 0.2
Incidents · Indian Ocean	2	3.6	0	—	1.0× / 2
Nav aids · North Pacific Ocean	2	3.4	0	—	1.7× / 1.2
Incidents · Davis Straitnew	2	3.3	0	—	new / 0
Incidents · Coral Sea	2	1.3	0	—	0.5× / 4.4
Incidents · Great Australian Bight	2	0.8	0	—	10× / 0.2
Cable ops · Ceram Sea	1	46	2	180	5.0× / 0.2
Surveys · South Atlantic Ocean	1	45	1	326	0.5× / 2
Incidents · Tyrrhenian Sea	1	39.7	1	34	5.0× / 0.2
Ordnance · North Sealong running	1	34.7	1	577	0.6× / 1.6
Wrecks · North Sea	1	30.3	1	52	5.0× / 0.2
Structures · Mediterranean Sea - Eastern Basin	1	27.5	1	27	5.0× / 0.2
Wrecks · South Atlantic Ocean	1	19	1	19	2.5× / 0.4
Cable ops · Singapore Strait	1	18.8	1	18	new / 0
Other · South Pacific Ocean	1	18.1	0	—	2.5× / 0.4
Incidents · Ligurian Sea	1	17.9	1	17	new / 0
Incidents · Bay of Bengal	1	17.4	1	17	1.0× / 1
Towing · South China Sea	1	17	0	—	new / 0
Incidents · Ionian Sea	1	16.3	1	16	new / 0
Exercises · Caribbean Sea	1	15.4	0	—	2.5× / 0.4
Cable ops · Indian Ocean	1	15.4	0	—	1.7× / 0.6
Spills · North Pacific Ocean	1	15	1	42	0.6× / 1.8
Towing · Makassar Strait	1	14	1	14	new / 0
Surveys · Laccadive Sea	1	13.3	0	—	5.0× / 0.2
Nav aids · Coral Sea	1	13.2	0	—	0.4× / 2.8
Surveys · Gulf of Suez	1	13	1	12	new / 0
Surveys · Black Sea	1	12.4	0	—	5.0× / 0.2
Cable ops · Banda Sea	1	9.9	1	9	new / 0
Surveys · Philippine Sea	1	9.6	0	—	1.0× / 1
Cable ops · Celtic Sea	1	7.7	1	34	0.7× / 1.4
Exercises · Black Sea	1	7.5	1	38	0.5× / 2
Other · Gulf of Mexico	1	7	1	6	new / 0
Nav aids · Bay of Bengal	1	6.7	0	—	5.0× / 0.2
Exercises · South Pacific Ocean	1	6.5	0	—	0.2× / 4.8
Missiles · Bay of Bengal	1	5.9	0	—	new / 0
Piracy · Mozambique Channel	1	5.6	1	5	new / 0
Exercises · Andaman or Burma Sea	1	5.3	0	—	1.0× / 1
Cable ops · Mozambique Channel	1	5	0	—	5.0× / 0.2
Other · Tasman Sea	1	4.1	0	—	new / 0
Other · Indian Ocean	1	3.8	0	—	1.0× / 1
Cable ops · North Sea	1	3.5	0	—	1.0× / 1
Cable ops · Strait of Gibraltar	1	3.3	0	—	new / 0
Debris · Caribbean Sea	1	3	0	—	5.0× / 0.2
Quakes · Flores Sea	1	3	0	—	new / 0
Derelicts · Great Australian Bight	1	3	0	—	new / 0
Derelicts · Gulf of Mexico	1	3	0	—	2.5× / 0.4
Icebergs · Gulf of St. Lawrence	1	3	0	—	new / 0
Quakes · Gulf of Tomini	1	3	0	—	5.0× / 0.2
Debris · Indian Ocean	1	3	0	—	new / 0
Derelicts · Indian Ocean	1	3	0	—	1.7× / 0.6
Debris · Mediterranean Sea - Eastern Basin	1	3	0	—	5.0× / 0.2
Quakes · Molukka Sea	1	3	0	—	1.3× / 0.8
Containers · Mozambique Channel	1	3	0	—	new / 0
Quakes · Solomon Sea	1	3	0	—	0.5× / 2.2
Derelicts · South China Sea	1	3	0	—	1.3× / 0.8
Debris · South Pacific Ocean	1	3	0	—	new / 0
Derelicts · South Pacific Ocean	1	3	0	—	0.7× / 1.4
Quakes · Southern Ocean	1	3	0	—	1.7× / 0.6
Derelicts · Tasman Sea	1	3	0	—	new / 0
Icebergs · Southern Ocean	1	2.7	1	2	0.4× / 2.6
Exercises · Bay of Biscay	1	2.6	0	—	new / 0
Surveys · Gulf of California	1	2.6	1	2	new / 0
Nav aids · Bristol Channel	1	2.5	0	—	1.0× / 1
Cable ops · Gulf of Suez	1	1.9	0	—	5.0× / 0.2
Ordnance · North Atlantic Ocean	1	1.8	0	—	new / 0
Incidents · Mediterranean Sea - Eastern Basin	1	0.8	1	0	0.5× / 2
Surveys · Mediterranean Sea - Western Basin	1	0.8	0	—	5.0× / 0.2
Quakes · Celebes Sea	1	0.6	1	0	5.0× / 0.2
Cable ops · Eastern China Sea	1	0.5	1	37	1.7× / 0.6
Exercises · Indian Ocean	1	0.5	1	0	5.0× / 0.2
Incidents · Celtic Sea	1	0.3	0	—	2.5× / 0.4
Quakes · Andaman or Burma Sea	1	0.2	1	0	new / 0
Nav aids · Gulf of Alaska	1	0.1	0	—	1.3× / 0.8
Incidents · North Sea	1	0.1	0	—	5.0× / 0.2
Surveys · Beaufort Sealong running	0	713	23	2,335	0.0× / 0.2
Surveys · Arctic Oceanlong running	0	465	15	2,335	— / 0
Surveys · Baffin Baylong running	0	155	5	2,433	— / 0
Surveys · The Northwestern Passageslong running	0	155	5	1,318	— / 0
Nav aids · South Pacific Ocean	0	124	4	137	0.0× / 1.6
Exercises · Aegean Sea	0	93	3	152	0.0× / 2.4
Surveys · Laptev Sealong running	0	93	3	1,469	0.0× / 0.4
Wrecks · The Northwestern Passageslong running	0	93	3	632	— / 0
Nav aids · Malacca Strait	0	62	2	69	— / 0
Other · South China Sealong running	0	62	2	684	0.0× / 0.2
Wrecks · South China Sealong running	0	62	2	1,041	— / 0
Wrecks · Inner Seas off the West Coast of Scotland	0	52.4	1	227	0.0× / 0.2
Wrecks · North Atlantic Oceanlong running	0	52.4	1	734	0.0× / 0.2
Incidents · Adriatic Sea	0	31	1	37	— / 0
Wrecks · Arabian Sea	0	31	1	166	0.0× / 0.2
Debris · Arctic Oceanlong running	0	31	1	1,987	— / 0
Other · Arctic Oceanlong running	0	31	1	1,000	— / 0
Surveys · Bering Sealong running	0	31	1	592	— / 0
Other · Celtic Sea	0	31	1	32	— / 0
Surveys · Chukchi Sealong running	0	31	1	1,868	— / 0
Ordnance · English Channel	0	31	1	76	— / 0
Surveys · Greenland Sealong running	0	31	1	2,651	— / 0
Surveys · Gulf of Guinea	0	31	1	149	— / 0
Surveys · Gulf of Mexico	0	31	1	45	0.0× / 0.2
Ordnance · Ionian Sea	0	31	1	35	— / 0
Other · Irish Sea and St. George's Channel	0	31	1	46	0.0× / 0.2
Incidents · Laccadive Sea	0	31	1	35	0.0× / 0.2
Surveys · Malacca Straitlong running	0	31	1	664	— / 0
Nav aids · Mozambique Channel	0	31	1	41	0.0× / 0.4
Surveys · Mozambique Channel	0	31	1	40	0.0× / 0.4
Structures · North Sea	0	31	1	42	— / 0
Surveys · North Sea	0	31	1	89	0.0× / 1.2
Piracy · Persian Gulflong running	0	31	1	873	— / 0
Volcanic · Philippine Sea	0	31	1	94	0.0× / 0.2
Cable ops · Yellow Sea	0	31	1	54	0.0× / 0.2
Structures · South China Sea	0	22	0	—	0.0× / 0.2
Cable ops · Andaman or Burma Sea	0	20	0	—	0.0× / 0.2
Wrecks · Celtic Sea	0	14.4	0	—	— / 0
Surveys · Arabian Sea	0	8	0	—	0.0× / 0.2
Other · Caribbean Sea	0	7.4	0	—	— / 0
Quakes · Bering Sea	0	5.9	0	—	0.0× / 0.6
Ordnance · North Pacific Ocean	0	4.9	0	—	— / 0
Piracy · Java Sea	0	4	0	—	— / 0
Piracy · Malacca Strait	0	2	0	—	— / 0
Cable ops · South Pacific Ocean	0	0.8	0	—	0.0× / 0.2
Other · Coral Sea	0	0.4	0	—	— / 0
Surveys · Irish Sea and St. George's Channel	0	0.4	0	—	0.0× / 0.6
Nav aids · Tasman Sea	0	0.4	0	—	0.0× / 1.4
Surveys · Tasman Sea	0	0.4	0	—	0.0× / 0.6
Missiles · South Atlantic Ocean	0	0.2	0	—	— / 0
Ordnance · Mediterranean Sea - Eastern Basin	0	0	0	—	— / 0
Cable ops · Mediterranean Sea - Western Basin	0	0	0	—	0.0× / 1

Cite: seahazards.com Sea Ledger, 2010-05, 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.