Sea Ledger, August 2007

2007-08-01 to 2007-08-31 · archive

issued: 335
warning-days in force: 17,086
in force at month end: 542
sea × type cells: 261

baseline: same month, previous 5 years (2006-08, 2005-08, 2004-08, 2003-08, 2002-08)

By type

type	issued	warning-days	in force at end
Exercises	62	827.9	20
Quakes	56	237.2	4
Incidents	55	1,631.6	58
Cable ops	48	1,606.2	55
Nav aids	25	5,808.9	184
Surveys	21	2,499.7	79
Other	13	1,095.8	34
Icebergs	12	77	3
Derelicts	11	169.7	4
Spills	9	128	5
Wrecks	7	1,719.2	57
Missiles	6	62.9	2
Debris	3	50.2	1
Volcanic	2	213.2	7
Towing	2	68.4	2
Ordnance	2	249.7	9
Containers	1	6.3	0
Restricted	0	330.1	9
Structures	0	272.7	8
Piracy	0	31	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Quakes · South Pacific Oceansurge	22	67.3	0	—	2.6× / 8.4
Exercises · North Atlantic Ocean	16	40.7	1	32	1.4× / 11.8
Incidents · North Pacific Ocean	13	299.9	10	83	1.1× / 11.4
Exercises · North Pacific Ocean	13	125.8	2	35	1.3× / 10
Cable ops · North Atlantic Oceansurge	12	97.9	4	112	8.6× / 1.4
Cable ops · South Atlantic Ocean	11	68	3	32	1.0× / 11.4
Incidents · South Pacific Ocean	10	278.2	11	86	1.4× / 7
Exercises · Philippine Seasurge	8	46.3	1	29	8.0× / 1
Icebergs · South Atlantic Oceansurge	7	50.7	0	—	2.3× / 3
Missiles · North Pacific Ocean	6	62	2	61	1.1× / 5.6
Incidents · Philippine Sea	5	99.4	1	88	0.8× / 6.2
Incidents · South China Seasurge	5	79	4	79	2.3× / 2.2
Other · North Seasurge	5	77.4	3	27	2.3× / 2.2
Derelicts · North Atlantic Oceansurge	5	29.6	1	24	4.2× / 1.2
Quakes · North Pacific Ocean	5	15.2	0	—	0.6× / 8.4
Nav aids · North Sea	4	333	11	316	0.9× / 4.6
Other · South Pacific Oceannewlong running	4	101.4	3	431	new / 0
Incidents · Coral Sea	4	22	2	14	0.9× / 4.2
Quakes · South Atlantic Oceansurge	4	17.1	0	—	2.9× / 1.4
Quakes · Japan Seasurge	4	12	0	—	10× / 0.4
Nav aids · Inner Seas off the West Coast of Scotlandlong running	3	181	5	449	0.9× / 3.4
Incidents · North Atlantic Ocean	3	139	5	302	0.8× / 3.8
Cable ops · South China Sea	3	134.8	5	173	1.5× / 2
Wrecks · English Channelnew	3	110	4	85	new / 0
Surveys · South Atlantic Ocean	3	93.5	3	74	1.3× / 2.4
Nav aids · Celtic Seasurge	3	60.1	2	78	15× / 0.2
Incidents · Mediterranean Sea - Eastern Basinsurge	3	40.8	3	27	2.5× / 1.2
Exercises · Bay of Bengal	3	38.8	2	44	0.7× / 4.4
Cable ops · Black Seasurge	3	32.6	2	36	15× / 0.2
Spills · North Pacific Oceansurge	3	26	2	27	7.5× / 0.4
Exercises · Baltic Seanew	3	18.5	0	—	new / 0
Icebergs · South Pacific Oceannew	3	15.5	1	15	new / 0
Quakes · Coral Seasurge	3	9	0	—	2.1× / 1.4
Quakes · Southern Ocean	3	9	0	—	1.5× / 2
Nav aids · Arabian Sealong running	2	464.5	15	599	1.3× / 1.6
Wrecks · North Sealong running	2	226.8	8	703	2.0× / 1
Cable ops · Mediterranean Sea - Eastern Basin	2	219.7	8	101	0.8× / 2.6
Nav aids · Irish Sea and St. George's Channellong running	2	158.6	5	540	1.3× / 1.6
Surveys · Sea of Okhotsk	2	153.7	5	96	2.5× / 0.8
Nav aids · South Atlantic Ocean	2	145.5	4	300	0.5× / 4.4
Nav aids · Tasman Sealong running	2	118	5	566	1.7× / 1.2
Incidents · Bay of Bengal	2	103.8	2	82	1.4× / 1.4
Surveys · North Atlantic Oceanlong running	2	79.9	3	513	1.4× / 1.4
Exercises · Laccadive Sea	2	73.8	1	43	0.2× / 10
Cable ops · Celtic Sea	2	72.8	2	206	1.0× / 2
Nav aids · Great Australian Bight	2	70.5	3	361	3.3× / 0.6
Cable ops · Caribbean Seanew	2	70.1	3	148	new / 0
Exercises · Yellow Sea	2	66.5	2	35	1.3× / 1.6
Surveys · Bay of Bengal	2	63	3	155	3.3× / 0.6
Spills · Gulf of Mexico	2	47	1	43	0.6× / 3.6
Derelicts · Indian Ocean	2	38	1	31	5.0× / 0.4
Spills · North Atlantic Ocean	2	28	0	—	3.3× / 0.6
Exercises · Sea of Okhotsk	2	16.8	0	—	5.0× / 0.4
Cable ops · Gulf of Mexiconew	2	16.5	1	46	new / 0
Surveys · Philippine Sea	2	13	1	14	5.0× / 0.4
Icebergs · North Atlantic Ocean	2	10.8	2	6	10× / 0.2
Exercises · South Pacific Ocean	2	9.5	0	—	1.0× / 2
Surveys · English Channel	2	7	1	7	2.5× / 0.8
Quakes · Banda Sea	2	6	0	—	2.5× / 0.8
Quakes · Java Sea	2	6	0	—	10× / 0.2
Quakes · North Atlantic Ocean	2	6	0	—	5.0× / 0.4
Quakes · Philippine Sea	2	6	0	—	1.7× / 1.2
Exercises · Arabian Sea	2	5.5	1	36	1.1× / 1.8
Exercises · Indian Ocean	2	4.4	0	—	2.0× / 1
Quakes · Molukka Sea	2	3.2	1	29	2.5× / 0.8
Incidents · Mozambique Channelnew	2	2.9	0	—	new / 0
Nav aids · South Pacific Oceanlong running	1	632.7	20	603	0.4× / 2.6
Nav aids · Coral Sealong running	1	438	15	1,153	0.5× / 2
Incidents · Indian Ocean	1	236.1	8	102	0.3× / 3.2
Incidents · South Atlantic Ocean	1	139	4	81	0.3× / 3.4
Wrecks · South China Sealong running	1	115.4	4	1,044	1.7× / 0.6
Cable ops · Indian Ocean	1	114.1	3	218	2.5× / 0.4
Nav aids · Gulf of Mexicolong running	1	93.1	3	872	2.5× / 0.4
Nav aids · Persian Gulflong running	1	85.6	3	377	2.5× / 0.4
Cable ops · North Sea	1	79.4	3	142	2.5× / 0.4
Surveys · Indian Ocean	1	76.3	2	331	new / 0
Cable ops · Sea of Okhotsk	1	71	1	79	1.3× / 0.8
Cable ops · Persian Gulf	1	64.8	3	133	2.5× / 0.4
Exercises · Japan Sea	1	63.6	1	35	0.5× / 2
Other · South China Sealong running	1	62.4	2	443	1.7× / 0.6
Nav aids · Andaman or Burma Sealong running	1	59.5	2	667	1.0× / 1
Surveys · North Sealong running	1	57.6	1	480	0.7× / 1.4
Surveys · North Pacific Oceanlong running	1	54.7	1	760	1.7× / 0.6
Towing · South Atlantic Ocean	1	45.8	1	286	5.0× / 0.2
Exercises · Black Sea	1	35.9	1	134	0.1× / 9.4
Cable ops · Singapore Strait	1	31	1	78	new / 0
Cable ops · Bass Strait	1	30.7	1	30	5.0× / 0.2
Incidents · Arafura Sea	1	28.1	1	28	5.0× / 0.2
Wrecks · Inner Seas off the West Coast of Scotland	1	27	1	26	5.0× / 0.2
Exercises · South Atlantic Ocean	1	25.9	0	—	0.2× / 4.6
Incidents · Arabian Sea	1	24.7	1	73	0.7× / 1.4
Towing · Black Sea	1	22.6	1	22	5.0× / 0.2
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	21	1	38	1.7× / 0.6
Volcanic · North Atlantic Ocean	1	18.6	0	—	new / 0
Cable ops · Japan Sea	1	18.5	1	18	2.5× / 0.4
Incidents · Ionian Sea	1	17.5	1	17	5.0× / 0.2
Surveys · Malacca Strait	1	17.5	1	17	new / 0
Surveys · Gulf of Guinea	1	17.4	0	—	2.5× / 0.4
Ordnance · Persian Gulf	1	16.5	1	16	2.5× / 0.4
Ordnance · Philippine Sea	1	16.2	1	16	2.5× / 0.4
Surveys · Caribbean Sea	1	8.8	1	8	new / 0
Volcanic · Savu Sea	1	8.6	1	8	new / 0
Cable ops · Bering Sea	1	8.5	1	8	new / 0
Surveys · Celtic Sea	1	8.3	0	—	0.7× / 1.4
Cable ops · Irish Sea and St. George's Channel	1	8.1	0	—	5.0× / 0.2
Surveys · Aegean Sea	1	6.6	0	—	new / 0
Debris · English Channel	1	6.5	0	—	new / 0
Derelicts · Mediterranean Sea - Eastern Basin	1	6.5	0	—	0.3× / 3.6
Debris · Arabian Sea	1	6.4	0	—	new / 0
Containers · Arabian Sea	1	6.3	0	—	2.5× / 0.4
Other · Labrador Sea	1	6.3	0	—	0.3× / 3.2
Debris · Philippine Sea	1	6.3	0	—	new / 0
Cable ops · Alboran Sea	1	6.2	0	—	5.0× / 0.2
Quakes · Eastern China Sea	1	5.6	0	—	2.5× / 0.4
Other · Baltic Sea	1	3.4	1	3	new / 0
Quakes · Gulf of Aden	1	3	0	—	new / 0
Quakes · Sea of Okhotsk	1	3	0	—	new / 0
Quakes · Solomon Sea	1	3	0	—	1.0× / 1
Exercises · Andaman or Burma Sea	1	2.9	0	—	1.0× / 1
Cable ops · Mediterranean Sea - Western Basin	1	2.8	0	—	2.5× / 0.4
Derelicts · South China Sea	1	2.8	0	—	1.7× / 0.6
Incidents · Adriatic Sea	1	2.7	1	2	1.7× / 0.6
Derelicts · Bay of Biscay	1	2.4	0	—	5.0× / 0.2
Exercises · Caribbean Sea	1	2.4	0	—	new / 0
Spills · Caribbean Sea	1	2	1	2	new / 0
Exercises · Mediterranean Sea - Western Basin	1	1.8	0	—	5.0× / 0.2
Quakes · Ceram Sea	1	1.3	1	1	new / 0
Exercises · Coral Sea	1	0.8	0	—	new / 0
Incidents · Tasman Sea	1	0.8	1	0	0.5× / 2
Other · Arctic Ocean	1	0.4	1	0	5.0× / 0.2
Derelicts · Celtic Sea	1	0.3	0	—	new / 0
Incidents · North Sea	1	0	0	—	5.0× / 0.2
Surveys · Beaufort Sealong running	0	713	23	1,331	— / 0
Surveys · Arctic Oceanlong running	0	403	13	1,331	0.0× / 0.2
Nav aids · Caribbean Sealong running	0	390.3	11	809	— / 0
Nav aids · Indian Oceanlong running	0	372	12	473	0.0× / 1.4
Nav aids · Bay of Bengallong running	0	248	8	809	0.0× / 0.4
Nav aids · Mozambique Channellong running	0	217	7	871	0.0× / 0.4
Nav aids · North Pacific Oceanlong running	0	210.7	6	772	0.0× / 0.2
Exercises · Aegean Sea	0	186	6	240	0.0× / 1.6
Wrecks · Mediterranean Sea - Eastern Basinlong running	0	186	6	1,159	0.0× / 0.2
Wrecks · Persian Gulflong running	0	186	6	398	0.0× / 0.4
Nav aids · Laccadive Sealong running	0	167.2	5	602	— / 0
Surveys · Baffin Baylong running	0	155	5	1,429	— / 0
Structures · Mediterranean Sea - Eastern Basinlong running	0	155	5	435	— / 0
Nav aids · Tyrrhenian Sealong running	0	155	5	1,016	0.0× / 0.8
Cable ops · Bay of Bengal	0	149	4	277	0.0× / 0.2
Nav aids · Bass Strait	0	136.2	4	347	0.0× / 0.2
Nav aids · Arafura Sealong running	0	124	4	389	0.0× / 0.2
Nav aids · Bering Sealong running	0	124	4	408	0.0× / 1.2
Nav aids · English Channellong running	0	124	4	684	0.0× / 1.2
Nav aids · Mediterranean Sea - Western Basinlong running	0	124	4	497	0.0× / 1.2
Cable ops · Tasman Sealong running	0	124	4	579	— / 0
Nav aids · North Atlantic Oceanlong running	0	117.7	3	591	0.0× / 3.6
Other · South Atlantic Ocean	0	117.7	3	335	0.0× / 0.6
Surveys · Laptev Sealong running	0	93	3	465	— / 0
Ordnance · North Sea	0	93	3	112	0.0× / 0.6
Other · Persian Gulflong running	0	93	3	571	0.0× / 0.8
Derelicts · Arabian Sea	0	65.9	2	81	0.0× / 0.2
Quakes · Bay of Bengal	0	64.5	2	263	— / 0
Other · Arabian Sealong running	0	62	2	562	— / 0
Wrecks · Arabian Sealong running	0	62	2	496	0.0× / 0.8
Wrecks · Bay of Bengallong running	0	62	2	455	0.0× / 0.6
Wrecks · Coral Sealong running	0	62	2	583	— / 0
Cable ops · Gulf of Guinea	0	62	2	165	0.0× / 0.6
Incidents · Gulf of Guinea	0	62	2	315	0.0× / 0.2
Nav aids · Gulf of Suez	0	62	2	260	0.0× / 0.2
Surveys · Gulf of Suezlong running	0	62	2	409	— / 0
Other · Indian Oceanlong running	0	62	2	526	— / 0
Wrecks · Indian Oceanlong running	0	62	2	998	0.0× / 0.2
Exercises · Ionian Sea	0	62	2	231	0.0× / 0.2
Wrecks · Laccadive Sea	0	62	2	198	— / 0
Nav aids · Mediterranean Sea - Eastern Basinlong running	0	62	2	1,106	0.0× / 0.6
Other · Mediterranean Sea - Eastern Basin	0	62	2	134	0.0× / 1.6
Volcanic · Philippine Sea	0	62	2	331	0.0× / 0.8
Wrecks · Philippine Sealong running	0	62	2	508	— / 0
Nav aids · Sea of Okhotsklong running	0	62	2	437	— / 0
Volcanic · South Pacific Ocean	0	62	2	209	— / 0
Wrecks · South Pacific Ocean	0	62	2	350	— / 0
Wrecks · Tasman Sealong running	0	62	2	469	— / 0
Surveys · The Northwestern Passages	0	62	2	314	— / 0
Ordnance · Tyrrhenian Sea	0	62	2	288	0.0× / 1
Wrecks · Tyrrhenian Sealong running	0	62	2	528	0.0× / 0.2
Restricted · Alboran Sea	0	55.7	1	42	— / 0
Other · Caribbean Sea	0	55.7	1	277	0.0× / 0.8
Other · Bay of Bengal	0	43.2	1	305	0.0× / 0.4
Surveys · Black Sea	0	35.7	0	—	0.0× / 0.8
Cable ops · Arabian Sea	0	31	1	56	0.0× / 0.4
Surveys · Arabian Sealong running	0	31	1	598	— / 0
Debris · Arctic Oceanlong running	0	31	1	983	— / 0
Nav aids · Baltic Sea	0	31	1	74	— / 0
Volcanic · Banda Sea	0	31	1	151	— / 0
Restricted · Bay of Bengallong running	0	31	1	500	— / 0
Incidents · Bay of Biscay	0	31	1	39	0.0× / 0.4
Ordnance · Black Sea	0	31	1	95	0.0× / 0.4
Wrecks · Black Sea	0	31	1	32	— / 0
Restricted · Caribbean Sea	0	31	1	199	— / 0
Wrecks · Caribbean Sea	0	31	1	305	— / 0
Surveys · Chukchi Sealong running	0	31	1	864	— / 0
Other · Coral Sea	0	31	1	173	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2007-08, 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.