Sea Ledger, July 2009

2009-07-01 to 2009-07-31 · archive

issued: 322
warning-days in force: 7,409
in force at month end: 231
sea × type cells: 172

baseline: same month, previous 5 years (2008-07, 2007-07, 2006-07, 2005-07, 2004-07)

By type

type	issued	warning-days	in force at end
Exercises	72	623.5	17
Cable ops	71	818.1	27
Nav aids	44	1,292	41
Incidents	31	692.1	19
Quakes	31	87.8	4
Spills	19	275	6
Surveys	16	2,346.6	75
Derelicts	9	47.3	0
Icebergs	7	29.1	2
Other	5	346.7	13
Missiles	5	62	2
Piracy	3	80.1	2
Wrecks	3	399.6	14
Containers	3	11.4	0
Debris	2	48.2	1
Ordnance	1	63.3	2
Volcanic	0	93	3
Structures	0	62	2
Restricted	0	31	1

By sea and type · 172 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceansurge	49	261	9	265	3.8× / 13
Exercises · South Atlantic Oceansurge	13	70.7	3	34	4.6× / 2.8
Exercises · North Pacific Ocean	13	70.4	1	35	1.0× / 13
Spills · Gulf of Mexicosurge	11	163	4	39	2.2× / 5
Exercises · Japan Seasurge	11	68.8	2	39	2.8× / 4
Nav aids · Gulf of Alaskasurge	8	4	1	28	6.7× / 1.2
Nav aids · North Sea	7	195.9	5	356	1.7× / 4.2
Exercises · North Atlantic Ocean	6	17.9	0	—	1.3× / 4.8
Incidents · North Atlantic Ocean	5	118	4	50	1.2× / 4.2
Incidents · South Atlantic Ocean	5	67.8	2	44	1.4× / 3.6
Missiles · North Pacific Ocean	5	62	2	33	0.9× / 5.6
Exercises · Yellow Sea	5	37.1	1	36	1.1× / 4.4
Cable ops · Celtic Seasurge	5	29.7	1	29	4.2× / 1.2
Quakes · South Pacific Ocean	5	10.7	2	23	0.5× / 10.6
Nav aids · South Atlantic Oceanlong running	4	261	8	619	1.4× / 2.8
Incidents · Indian Ocean	4	89.5	1	71	1.5× / 2.6
Nav aids · Inner Seas off the West Coast of Scotland	4	59.5	2	231	1.1× / 3.6
Exercises · Laccadive Sea	4	56.5	2	34	0.5× / 7.8
Exercises · Bay of Bengal	4	54.9	2	34	1.0× / 4
Spills · North Atlantic Ocean	4	52	2	26	1.8× / 2.2
Nav aids · Irish Sea and St. George's Channel	4	41.6	1	285	1.5× / 2.6
Icebergs · Southern Ocean	4	15.6	2	25	1.7× / 2.4
Exercises · South Pacific Ocean	4	12.9	0	—	0.8× / 5
Quakes · North Pacific Ocean	4	11.4	1	25	0.7× / 6.2
Nav aids · The Coastal Waters of Southeast Alaska and British Columbiasurge	4	1.7	0	—	20× / 0.2
Incidents · North Pacific Ocean	3	131.7	4	59	0.4× / 6.8
Surveys · South Atlantic Ocean	3	59.4	2	30	1.4× / 2.2
Spills · North Pacific Ocean	3	46	0	—	1.3× / 2.4
Incidents · South Pacific Ocean	3	44.1	1	74	0.3× / 9.4
Exercises · Philippine Seasurge	3	40.8	2	35	15× / 0.2
Icebergs · South Atlantic Ocean	3	13.5	0	—	1.1× / 2.8
Quakes · Indian Ocean	3	9	0	—	0.5× / 6
Quakes · Philippine Seasurge	3	9	0	—	3.0× / 1
Quakes · Tasman Seasurge	3	9	0	—	15× / 0.2
Surveys · Mediterranean Sea - Western Basinsurge	3	7.1	1	25	7.5× / 0.4
Nav aids · Celtic Seasurge	3	4.1	1	24	2.1× / 1.4
Wrecks · Inner Seas off the West Coast of Scotlandnew	2	79.7	4	224	new / 0
Cable ops · South China Sea	2	77.4	3	47	1.1× / 1.8
Incidents · South China Sea	2	69.4	2	54	2.5× / 0.8
Incidents · Bay of Bengal	2	55.4	2	68	2.5× / 0.8
Surveys · Sea of Okhotsk	2	46.5	1	57	2.5× / 0.8
Surveys · Irish Sea and St. George's Channelnew	2	39.7	1	63	new / 0
Cable ops · Mediterranean Sea - Western Basin	2	35.8	1	87	1.3× / 1.6
Incidents · Bay of Biscay	2	32.7	1	54	2.5× / 0.8
Cable ops · Indian Ocean	2	25.2	0	—	3.3× / 0.6
Nav aids · Tasman Sea	2	24.9	2	15	5.0× / 0.4
Piracy · Singapore Straitnew	2	13.8	0	—	new / 0
Derelicts · North Atlantic Ocean	2	13.4	0	—	1.7× / 1.2
Cable ops · Tasman Sea	2	10.9	1	21	10× / 0.2
Containers · South Atlantic Ocean	2	9.6	0	—	3.3× / 0.6
Incidents · Bismarck Sea	2	7.6	0	—	10× / 0.2
Derelicts · Indian Ocean	2	6.9	0	—	2.0× / 1
Quakes · Coral Sea	2	6	0	—	1.1× / 1.8
Quakes · Molukka Sea	2	6	0	—	2.0× / 1
Quakes · Solomon Sea	2	5.1	1	6	3.3× / 0.6
Nav aids · Gulf of Mexico	2	1.2	0	—	2.5× / 0.8
Nav aids · Bristol Channel	2	1	0	—	5.0× / 0.4
Nav aids · North Atlantic Ocean	1	107.1	3	363	0.4× / 2.4
Nav aids · Coral Sealong running	1	98.2	3	514	0.6× / 1.8
Cable ops · Gulf of Mexico	1	89.8	3	220	1.0× / 1
Nav aids · Sea of Okhotsk	1	85.3	3	200	new / 0
Surveys · Mediterranean Sea - Eastern Basin	1	64.4	2	239	0.5× / 2.2
Wrecks · North Atlantic Oceanlong running	1	47.5	2	430	new / 0
Surveys · Indian Ocean	1	47.3	0	—	2.5× / 0.4
Cable ops · Arabian Sea	1	42.6	2	92	5.0× / 0.2
Surveys · North Atlantic Ocean	1	38.9	2	53	0.5× / 2
Cable ops · Mediterranean Sea - Eastern Basin	1	37.9	1	67	0.4× / 2.4
Cable ops · North Atlantic Ocean	1	36.7	0	—	0.3× / 4
Exercises · South China Sea	1	36.7	0	—	2.5× / 0.4
Cable ops · Singapore Strait	1	34.1	1	36	5.0× / 0.2
Other · Mediterranean Sea - Eastern Basin	1	32.5	2	296	2.5× / 0.4
Other · Gulf of Aden	1	18.7	1	18	new / 0
Surveys · Timor Sea	1	17.8	1	17	5.0× / 0.2
Cable ops · Sulu Sea	1	16.7	1	16	5.0× / 0.2
Surveys · North Sea	1	16.5	0	—	0.6× / 1.6
Incidents · Mozambique Channel	1	16	1	68	5.0× / 0.2
Nav aids · Indian Ocean	1	14.3	0	—	1.0× / 1
Spills · Chukchi Sea	1	14	0	—	new / 0
Incidents · Inner Seas off the West Coast of Scotland	1	10.1	1	10	new / 0
Exercises · Arctic Ocean	1	7.7	0	—	new / 0
Cable ops · Solomon Sea	1	7.7	1	7	new / 0
Cable ops · English Channel	1	7.1	0	—	1.0× / 1
Debris · Indian Ocean	1	6.8	0	—	new / 0
Derelicts · South China Sea	1	6.7	0	—	0.6× / 1.6
Derelicts · Mediterranean Sea - Eastern Basin	1	6.6	0	—	0.3× / 3.4
Debris · Celtic Sea	1	6.4	0	—	5.0× / 0.2
Derelicts · Mediterranean Sea - Western Basin	1	6.4	0	—	2.5× / 0.4
Exercises · Baltic Sea	1	6.3	0	—	1.0× / 1
Other · Yellow Sea	1	5.9	0	—	new / 0
Exercises · Andaman or Burma Sea	1	5.1	0	—	1.3× / 0.8
Derelicts · South Pacific Ocean	1	5.1	0	—	1.7× / 0.6
Other · North Sea	1	4.4	1	4	2.5× / 0.4
Exercises · Kara Sea	1	4	0	—	new / 0
Exercises · Arabian Sea	1	3.7	0	—	0.6× / 1.6
Quakes · Baffin Bay	1	3	0	—	new / 0
Quakes · Bismarck Sea	1	3	0	—	0.7× / 1.4
Quakes · Caribbean Sea	1	3	0	—	new / 0
Quakes · Gulf of Alaska	1	3	0	—	new / 0
Quakes · Gulf of California	1	3	0	—	5.0× / 0.2
Quakes · Mediterranean Sea - Eastern Basin	1	3	0	—	5.0× / 0.2
Quakes · Savu Sea	1	3	0	—	new / 0
Incidents · Tasman Sea	1	3	0	—	0.6× / 1.8
Other · North Pacific Ocean	1	2.8	0	—	0.8× / 1.2
Exercises · Mediterranean Sea - Eastern Basin	1	2.2	0	—	0.6× / 1.8
Derelicts · South Atlantic Ocean	1	2.2	0	—	0.5× / 2
Exercises · Celtic Sea	1	2	0	—	2.5× / 0.4
Exercises · Indian Ocean	1	1.8	0	—	1.7× / 0.6
Containers · South Pacific Ocean	1	1.8	0	—	1.7× / 0.6
Surveys · Balearic (Iberian Sea)	1	1.5	1	1	new / 0
Piracy · Indian Ocean	1	1.3	1	1	new / 0
Ordnance · North Atlantic Ocean	1	1.3	0	—	2.5× / 0.4
Cable ops · North Sea	1	0.4	1	0	0.6× / 1.6
Surveys · Beaufort Sealong running	0	744	24	2,031	— / 0
Surveys · Arctic Oceanlong running	0	496	16	2,031	0.0× / 0.4
Surveys · Baffin Baylong running	0	186	6	2,129	— / 0
Surveys · The Northwestern Passageslong running	0	186	6	1,014	— / 0
Exercises · Aegean Sea	0	124	4	189	0.0× / 0.6
Nav aids · Gulf of Suezlong running	0	93	3	455	— / 0
Other · Indian Oceanlong running	0	93	3	408	0.0× / 0.8
Surveys · Laptev Sealong running	0	93	3	1,165	— / 0
Wrecks · The Northwestern Passages	0	93	3	328	— / 0
Wrecks · Persian Gulf	0	86.4	2	259	0.0× / 0.8
Volcanic · Indian Oceanlong running	0	62	2	408	0.0× / 0.2
Nav aids · Malacca Straitlong running	0	62	2	382	0.0× / 0.2
Cable ops · Norwegian Sea	0	62	2	39	0.0× / 0.8
Nav aids · Red Sea	0	62	2	315	0.0× / 0.2
Surveys · Gulf of Guinea	0	54.5	1	169	— / 0
Nav aids · Gulf of California	0	37.8	1	252	— / 0
Nav aids · English Channel	0	37.6	1	106	0.0× / 1.4
Piracy · South China Sea	0	34	0	—	0.0× / 0.2
Nav aids · Arabian Sea	0	31	1	52	0.0× / 0.4
Debris · Arctic Oceanlong running	0	31	1	1,683	— / 0
Other · Arctic Oceanlong running	0	31	1	696	— / 0
Wrecks · Bay of Bengal	0	31	1	161	— / 0
Surveys · Bering Sea	0	31	1	288	— / 0
Other · Bismarck Sea	0	31	1	226	— / 0
Other · Caribbean Sea	0	31	1	149	0.0× / 0.2
Surveys · Chukchi Sealong running	0	31	1	1,564	— / 0
Other · Coral Sea	0	31	1	253	0.0× / 0.6
Surveys · Greenland Sealong running	0	31	1	2,347	— / 0
Ordnance · Gulf of Aden	0	31	1	137	— / 0
Surveys · Gulf of Suezlong running	0	31	1	548	0.0× / 0.4
Surveys · Inner Seas off the West Coast of Scotland	0	31	1	39	— / 0
Wrecks · Laccadive Sealong running	0	31	1	486	0.0× / 0.6
Surveys · Malacca Strait	0	31	1	360	0.0× / 0.4
Restricted · North Atlantic Ocean	0	31	1	92	0.0× / 0.8
Structures · North Atlantic Ocean	0	31	1	171	— / 0
Ordnance · North Sea	0	31	1	273	0.0× / 0.8
Structures · North Sea	0	31	1	48	— / 0
Nav aids · Persian Gulf	0	31	1	255	0.0× / 0.2
Piracy · Persian Gulflong running	0	31	1	569	— / 0
Surveys · Persian Gulf	0	31	1	339	— / 0
Volcanic · Philippine Sea	0	31	1	83	0.0× / 1.4
Other · South Atlantic Ocean	0	31	1	158	0.0× / 0.8
Nav aids · South China Sealong running	0	31	1	495	— / 0
Other · South China Sealong running	0	31	1	380	0.0× / 0.4
Wrecks · South China Sealong running	0	31	1	737	0.0× / 0.6
Surveys · Tasman Sea	0	31	1	102	— / 0
Cable ops · Yellow Sea	0	30	0	—	— / 0
Incidents · Arabian Sea	0	19	0	—	0.0× / 1
Incidents · Mediterranean Sea - Western Basin	0	17.4	0	—	— / 0
Incidents · Tyrrhenian Sea	0	10.4	0	—	0.0× / 0.6
Cable ops · Tyrrhenian Sea	0	8.3	0	—	0.0× / 0.2
Debris · North Pacific Ocean	0	4	0	—	0.0× / 0.2
Cable ops · Inner Seas off the West Coast of Scotland	0	3.8	0	—	— / 0
Nav aids · North Pacific Ocean	0	3.4	0	—	0.0× / 1.2
Nav aids · South Pacific Ocean	0	3.4	0	—	0.0× / 2.8
Other · South Pacific Ocean	0	3.4	0	—	0.0× / 0.4
Cable ops · Caribbean Sea	0	1	0	—	0.0× / 0.2
Quakes · Celebes Sea	0	0.6	0	—	— / 0
Surveys · Black Sea	0	0	0	—	0.0× / 0.8
Cable ops · Laccadive Sea	0	0	0	—	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2009-07, 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.