Sea Ledger, September 2008

2008-09-01 to 2008-09-30 · archive

issued: 377
warning-days in force: 9,220
in force at month end: 303
sea × type cells: 201

baseline: same month, previous 5 years (2007-09, 2006-09, 2005-09, 2004-09, 2003-09)

By type

type	issued	warning-days	in force at end
Exercises	92	702	23
Nav aids	52	1,990.5	69
Incidents	52	1,305.5	38
Cable ops	42	988.5	29
Quakes	34	102.9	2
Other	26	486.4	21
Surveys	22	2,169.6	76
Derelicts	18	147.1	3
Spills	15	220	6
Wrecks	6	468.4	15
Missiles	5	60	2
Icebergs	4	27.5	0
Ordnance	4	61.5	3
Restricted	2	135.4	4
Debris	2	42.9	1
Structures	1	30.3	2
Volcanic	0	120	4
Piracy	0	161	5

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	26	184.6	7	91	1.9× / 13.6
Exercises · North Atlantic Ocean	16	37.5	3	17	1.9× / 8.6
Exercises · North Pacific Ocean	15	108.3	2	34	1.9× / 8
Incidents · South Pacific Oceansurge	11	406.9	11	70	2.0× / 5.4
Spills · Gulf of Mexico	10	163	3	38	1.7× / 5.8
Incidents · South China Seasurge	9	94.1	5	64	3.5× / 2.6
Exercises · South Atlantic Ocean	8	53.1	3	25	1.5× / 5.4
Nav aids · North Sea	7	122.3	3	267	1.4× / 5
Exercises · Yellow Seasurge	7	71.9	3	32	2.5× / 2.8
Exercises · Bay of Bengal	7	55.2	2	36	1.4× / 5
Quakes · South Pacific Ocean	7	19.4	1	29	0.6× / 11.8
Nav aids · South Atlantic Oceansurge	6	221.5	8	315	2.1× / 2.8
Incidents · North Pacific Ocean	6	162.7	5	65	1.1× / 5.6
Exercises · Japan Sea	6	88.5	2	34	1.8× / 3.4
Nav aids · North Atlantic Oceansurge	6	76.9	3	166	2.3× / 2.6
Exercises · South Pacific Ocean	6	29.2	0	—	1.2× / 5
Quakes · Coral Seasurge	6	18	0	—	3.0× / 2
Incidents · Mediterranean Sea - Eastern Basinsurge	5	126.4	5	59	2.8× / 1.8
Missiles · North Pacific Ocean	5	60	2	30	1.0× / 4.8
Derelicts · South Atlantic Oceansurge	5	34.8	0	—	2.8× / 1.8
Other · Indian Oceansurge	5	34	1	104	25× / 0.2
Nav aids · Irish Sea and St. George's Channel	5	29.2	0	—	1.5× / 3.4
Surveys · The Northwestern Passagesnewlong running	4	163.6	6	710	new / 0
Other · Gulf of Adennew	4	125.8	8	35	new / 0
Nav aids · Gulf of Mexicosurge	4	99.2	3	354	2.9× / 1.4
Spills · North Atlantic Oceansurge	4	42	3	18	2.2× / 1.8
Exercises · South China Seasurge	4	36.5	0	—	4.0× / 1
Icebergs · South Atlantic Ocean	4	27.5	0	—	1.3× / 3
Incidents · Coral Seasurge	4	17.8	0	—	5.0× / 0.8
Quakes · Philippine Sea	4	12	0	—	1.0× / 4
Cable ops · South China Sea	3	182.3	5	360	1.1× / 2.6
Incidents · North Atlantic Ocean	3	73.7	1	55	0.9× / 3.2
Exercises · Laccadive Sea	3	57.1	2	36	0.3× / 9.2
Cable ops · North Sea	3	54.7	1	27	1.9× / 1.6
Exercises · Baltic Seasurge	3	21	1	27	7.5× / 0.4
Derelicts · Caribbean Seanew	3	14.4	0	—	new / 0
Exercises · Indian Oceansurge	3	10	1	33	2.5× / 1.2
Quakes · North Pacific Ocean	3	9	0	—	0.5× / 6.2
Derelicts · South China Seasurge	3	8.1	2	8	2.5× / 1.2
Other · Inner Seas off the West Coast of Scotlandnew	3	2.7	0	—	new / 0
Surveys · Beaufort Seanewlong running	2	740.3	25	1,727	new / 0
Nav aids · North Pacific Ocean	2	479.6	16	354	10× / 0.2
Nav aids · South Pacific Oceanlong running	2	175.1	5	479	0.9× / 2.2
Surveys · Gulf of Suez	2	63	3	244	10× / 0.2
Nav aids · Gulf of Suez	2	62.8	4	159	3.3× / 0.6
Surveys · North Sea	2	59.2	3	32	2.0× / 1
Wrecks · English Channel	2	55.4	1	70	2.5× / 0.8
Other · Sea of Okhotsknew	2	53	2	67	new / 0
Incidents · Philippine Sea	2	52.8	1	58	0.3× / 7.4
Wrecks · The Northwestern Passagesnew	2	48.6	2	24	new / 0
Ordnance · North Sea	2	46.8	3	107	2.5× / 0.8
Nav aids · Celtic Sea	2	39.3	1	222	0.6× / 3.6
Nav aids · English Channel	2	37.3	2	30	1.7× / 1.2
Other · North Atlantic Oceanlong running	2	36.8	1	517	2.5× / 0.8
Other · South Pacific Oceannew	2	34	2	18	new / 0
Incidents · Indian Ocean	2	24.7	1	23	0.5× / 4.2
Other · South Atlantic Ocean	2	15.9	0	—	2.0× / 1
Derelicts · South Pacific Ocean	2	15.6	0	—	5.0× / 0.4
Derelicts · Bay of Bengalnew	2	12.6	0	—	new / 0
Exercises · Arabian Sea	2	11.2	1	31	0.6× / 3.6
Surveys · South Atlantic Ocean	2	8.5	0	—	1.3× / 1.6
Incidents · South Atlantic Ocean	2	8.4	0	—	0.6× / 3.6
Exercises · Mediterranean Sea - Eastern Basin	2	6.5	0	—	0.9× / 2.2
Quakes · Indian Ocean	2	6	0	—	0.3× / 7.6
Quakes · North Atlantic Ocean	2	6	0	—	1.7× / 1.2
Quakes · Timor Seanew	2	6	0	—	new / 0
Exercises · Bering Sea	2	3.2	0	—	5.0× / 0.4
Exercises · Philippine Sea	2	3	0	—	1.1× / 1.8
Nav aids · Gulf of Alaskanew	2	2.8	0	—	new / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbianew	2	0.1	0	—	new / 0
Surveys · Arctic Oceanlong running	1	504.4	17	1,727	new / 0
Surveys · Baffin Baylong running	1	175.9	6	1,825	new / 0
Cable ops · Singapore Strait	1	89.5	2	119	2.5× / 0.4
Nav aids · Laccadive Sealong running	1	73.4	3	685	1.0× / 1
Cable ops · North Atlantic Ocean	1	73	1	105	0.4× / 2.4
Surveys · Gulf of Guinea	1	69.5	2	264	2.5× / 0.4
Nav aids · South China Sea	1	60.8	3	191	new / 0
Nav aids · Indian Ocean	1	36.7	1	187	0.6× / 1.6
Surveys · South Pacific Ocean	1	35.5	1	333	new / 0
Incidents · Tasman Sea	1	34.7	1	64	1.3× / 0.8
Cable ops · Eastern China Sea	1	34.4	2	53	1.3× / 0.8
Cable ops · Bay of Bengal	1	33	1	155	1.7× / 0.6
Nav aids · Coral Sea	1	32.8	1	210	0.6× / 1.8
Nav aids · Inner Seas off the West Coast of Scotland	1	31	1	83	0.8× / 1.2
Cable ops · Sea of Okhotsk	1	30.5	1	66	1.7× / 0.6
Surveys · Irish Sea and St. George's Channel	1	30	1	56	new / 0
Incidents · Gulf of Aden	1	27.6	1	27	new / 0
Incidents · Singapore Strait	1	26.7	1	26	new / 0
Surveys · Davis Strait	1	25.9	1	25	new / 0
Incidents · Sulu Sea	1	25.3	1	25	new / 0
Other · Celtic Sea	1	19.8	1	19	new / 0
Incidents · Japan Sea	1	19.7	1	19	new / 0
Incidents · Southern Ocean	1	16.8	1	16	new / 0
Spills · North Pacific Ocean	1	15	0	—	1.0× / 1
Restricted · Mediterranean Sea - Eastern Basin	1	14.5	1	14	new / 0
Wrecks · Caribbean Sea	1	13.3	1	13	new / 0
Nav aids · Red Sea	1	11.5	1	11	2.5× / 0.4
Ordnance · Laccadive Sea	1	9.5	0	—	new / 0
Cable ops · Timor Sea	1	8.6	0	—	1.7× / 0.6
Debris · South Atlantic Ocean	1	6.8	0	—	new / 0
Other · English Channel	1	6.5	0	—	2.5× / 0.4
Surveys · Mediterranean Sea - Eastern Basin	1	6.5	1	6	0.6× / 1.6
Derelicts · Indian Ocean	1	6.2	0	—	1.3× / 0.8
Debris · North Atlantic Ocean	1	6.1	0	—	5.0× / 0.2
Exercises · Black Sea	1	5.9	0	—	0.1× / 11.4
Derelicts · North Atlantic Ocean	1	5.9	1	5	1.3× / 0.8
Wrecks · Baltic Sea	1	5.4	1	5	new / 0
Derelicts · Philippine Sea	1	5.3	0	—	2.5× / 0.4
Incidents · Solomon Sea	1	5.3	0	—	new / 0
Ordnance · Persian Gulf	1	5.2	0	—	new / 0
Exercises · Sea of Okhotsk	1	4.8	0	—	0.7× / 1.4
Surveys · Black Sea	1	4.5	1	4	1.7× / 0.6
Exercises · Gulf of Mexico	1	3.8	0	—	2.5× / 0.4
Exercises · Mediterranean Sea - Western Basin	1	3.4	0	—	0.8× / 1.2
Quakes · Banda Sea	1	3	0	—	2.5× / 0.4
Quakes · Bering Sea	1	3	0	—	5.0× / 0.2
Quakes · Japan Sea	1	3	0	—	5.0× / 0.2
Surveys · Japan Sea	1	3	0	—	new / 0
Quakes · Molukka Sea	1	3	0	—	2.5× / 0.4
Quakes · Persian Gulf	1	3	0	—	new / 0
Quakes · Solomon Sea	1	3	0	—	0.4× / 2.8
Quakes · South Atlantic Ocean	1	3	0	—	0.3× / 3.4
Cable ops · Davis Strait	1	2.9	0	—	new / 0
Cable ops · Gulf of Guinea	1	2.9	0	—	new / 0
Other · Bass Strait	1	2.8	0	—	new / 0
Surveys · North Atlantic Ocean	1	2.2	0	—	0.8× / 1.2
Other · Davis Strait	1	2.1	1	2	new / 0
Quakes · Norwegian Sea	1	2.1	1	2	new / 0
Incidents · Bass Strait	1	1.8	0	—	new / 0
Nav aids · Bass Strait	1	1.7	0	—	1.7× / 0.6
Other · North Sea	1	1.6	0	—	2.5× / 0.4
Exercises · Adriatic Sea	1	1.4	0	—	5.0× / 0.2
Other · Bering Sea	1	1.4	0	—	new / 0
Cable ops · Mediterranean Sea - Eastern Basin	1	1.4	1	1	0.4× / 2.4
Restricted · Japan Sea	1	1.3	0	—	new / 0
Nav aids · Mediterranean Sea - Eastern Basin	1	1.3	1	1	1.7× / 0.6
Nav aids · Arafura Sea	1	0.9	0	—	1.3× / 0.8
Nav aids · Timor Sea	1	0.8	0	—	new / 0
Exercises · Malacca Strait	1	0.5	0	—	1.7× / 0.6
Cable ops · Black Sea	1	0.3	1	0	1.3× / 0.8
Structures · Black Sea	1	0.3	1	0	new / 0
Nav aids · Gulf of California	0	180	6	304	— / 0
Piracy · Gulf of Aden	0	131	4	35	— / 0
Exercises · Aegean Sea	0	90	3	248	0.0× / 2.6
Surveys · Laptev Sealong running	0	90	3	861	— / 0
Wrecks · South China Sealong running	0	90	3	637	0.0× / 0.4
Cable ops · Caribbean Sea	0	80	2	138	— / 0
Nav aids · Caribbean Sea	0	60	2	252	0.0× / 0.2
Volcanic · Indian Ocean	0	60	2	104	— / 0
Surveys · Malacca Strait	0	60	2	83	0.0× / 0.2
Other · Mediterranean Sea - Eastern Basin	0	60	2	310	0.0× / 0.8
Incidents · Mozambique Channel	0	60	2	37	0.0× / 0.8
Incidents · Bay of Biscay	0	56.3	1	49	0.0× / 0.4
Wrecks · Persian Gulf	0	56.3	1	81	0.0× / 0.6
Cable ops · Persian Gulf	0	35.4	1	209	0.0× / 1.4
Incidents · Arabian Sea	0	33.7	0	—	0.0× / 1.2
Restricted · Alboran Sea	0	30	1	61	— / 0
Nav aids · Arabian Sealong running	0	30	1	658	0.0× / 0.2
Wrecks · Arabian Sea	0	30	1	307	— / 0
Debris · Arctic Oceanlong running	0	30	1	1,379	— / 0
Other · Arctic Oceanlong running	0	30	1	392	0.0× / 0.2
Restricted · Baltic Sea	0	30	1	69	— / 0
Volcanic · Banda Sealong running	0	30	1	547	— / 0
Wrecks · Bay of Bengallong running	0	30	1	851	— / 0
Surveys · Bering Sealong running	0	30	1	378	0.0× / 0.4
Cable ops · Celebes Sea	0	30	1	62	— / 0
Surveys · Chukchi Sealong running	0	30	1	1,260	— / 0
Surveys · Greenland Sealong running	0	30	1	2,043	— / 0
Nav aids · Gulf of Guinea	0	30	1	36	— / 0
Cable ops · Gulf of Suez	0	30	1	39	0.0× / 0.4
Other · Gulf of Thailandlong running	0	30	1	656	— / 0
Wrecks · Laccadive Sea	0	30	1	182	— / 0
Nav aids · Malacca Strait	0	30	1	78	0.0× / 0.2
Wrecks · North Atlantic Ocean	0	30	1	126	0.0× / 0.2
Wrecks · North Pacific Oceanlong running	0	30	1	566	— / 0
Nav aids · Persian Gulf	0	30	1	79	0.0× / 0.2
Piracy · Persian Gulf	0	30	1	265	— / 0
Surveys · Persian Gulf	0	30	1	35	0.0× / 0.2
Nav aids · Philippine Sea	0	30	1	163	— / 0
Volcanic · Philippine Sea	0	30	1	87	— / 0
Cable ops · Red Sea	0	30	1	53	— / 0
Wrecks · South Atlantic Ocean	0	30	1	141	— / 0
Other · South China Sea	0	30	1	76	0.0× / 0.2
Structures · South China Sea	0	30	1	145	— / 0
Restricted · Strait of Gibraltar	0	30	1	42	— / 0
Cable ops · Sulu Sea	0	30	1	55	— / 0
Restricted · Black Sea	0	29.6	0	—	0.0× / 0.2
Cable ops · Mozambique Channel	0	22.8	0	—	— / 0
Cable ops · South Pacific Ocean	0	20	0	—	— / 0
Wrecks · Eastern China Sea	0	19.4	0	—	— / 0
Derelicts · Mediterranean Sea - Western Basin	0	19.4	0	—	0.0× / 0.2
Derelicts · Tyrrhenian Sea	0	19.4	0	—	0.0× / 0.2
Incidents · Tyrrhenian Sea	0	19.4	0	—	0.0× / 0.4
Cable ops · North Pacific Ocean	0	12.2	0	—	— / 0
Incidents · Bay of Bengal	0	10.7	0	—	0.0× / 1.6
Surveys · Alboran Sea	0	7.6	0	—	— / 0
Derelicts · North Pacific Ocean	0	5.4	0	—	0.0× / 0.8
Nav aids · Mediterranean Sea - Western Basin	0	3.5	0	—	0.0× / 1.2
Quakes · Southern Ocean	0	2.1	0	—	0.0× / 0.6
Quakes · Bismarck Sea	0	1.3	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2008-09, 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.