Sea Ledger, September 2007

2007-09-01 to 2007-09-30 · archive

issued: 290
warning-days in force: 16,663
in force at month end: 575
sea × type cells: 237

baseline: same month, previous 5 years (2006-09, 2005-09, 2004-09, 2003-09, 2002-09)

By type

type	issued	warning-days	in force at end
Exercises	70	822.7	27
Quakes	64	239.9	20
Cable ops	44	1,578.9	48
Incidents	38	1,734.6	68
Nav aids	19	5,594.4	190
Surveys	16	2,418	79
Icebergs	7	49.4	4
Derelicts	6	135.2	5
Spills	6	117	0
Missiles	6	60	2
Restricted	5	331.9	13
Other	3	966.5	32
Wrecks	3	1,776.2	59
Structures	2	282.9	10
Ordnance	1	225.4	7
Volcanic	0	210	7
Towing	0	60	2
Piracy	0	30	1
Debris	0	30	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Quakes · Indian Oceansurge	26	77.6	2	18	10× / 2.6
Cable ops · South Atlantic Ocean	19	92.4	2	34	1.2× / 16.4
Quakes · South Pacific Ocean	19	52.1	9	23	1.8× / 10.6
Exercises · North Pacific Ocean	11	89.9	2	46	1.6× / 7
Exercises · Black Sea	10	94.6	1	164	0.9× / 11.4
Nav aids · North Sea	8	366.8	14	346	1.7× / 4.6
Exercises · North Atlantic Ocean	8	59.9	4	32	0.8× / 10
Incidents · North Atlantic Oceansurge	7	203.6	10	332	2.5× / 2.8
Incidents · South Pacific Ocean	6	263.2	9	76	1.1× / 5.4
Missiles · North Pacific Ocean	6	60	2	56	1.3× / 4.6
Incidents · Philippine Sea	6	44.5	2	65	0.8× / 7.6
Exercises · Bay of Bengal	5	45.6	2	41	1.0× / 5.2
Icebergs · South Atlantic Ocean	5	30.9	2	17	1.8× / 2.8
Exercises · South Pacific Ocean	5	30.7	2	28	1.1× / 4.6
Quakes · Philippine Sea	5	13	3	24	1.5× / 3.4
Incidents · North Pacific Ocean	4	285.3	11	75	0.5× / 7.4
Incidents · Arabian Seasurge	4	57.5	4	50	3.3× / 1.2
Exercises · Japan Sea	4	56.1	1	32	1.2× / 3.4
Cable ops · North Atlantic Ocean	4	54.7	1	142	1.8× / 2.2
Exercises · Laccadive Sea	4	29.8	2	42	0.4× / 10
Quakes · Coral Seasurge	4	12	0	—	2.9× / 1.4
Quakes · North Pacific Ocean	4	7.3	2	27	0.7× / 5.8
Incidents · Indian Ocean	3	216.9	8	132	0.7× / 4.6
Incidents · South China Sea	3	166.6	7	53	0.9× / 3.4
Nav aids · Inner Seas off the West Coast of Scotlandsurgelong running	3	158.3	5	479	3.8× / 0.8
Surveys · South Atlantic Oceansurge	3	110.8	4	104	2.1× / 1.4
Exercises · Yellow Sea	3	68.1	2	32	1.4× / 2.2
Cable ops · Gulf of Mexiconew	3	64.8	1	41	new / 0
Derelicts · Indian Oceansurge	3	44	2	61	15× / 0.2
Exercises · Philippine Seasurge	3	30.6	1	30	2.5× / 1.2
Exercises · Arabian Sea	3	28	1	31	0.8× / 4
Exercises · South China Seasurge	3	5.8	0	—	7.5× / 0.4
Cable ops · Mediterranean Sea - Eastern Basin	2	195.1	5	131	0.9× / 2.2
Exercises · Aegean Sea	2	185.9	6	270	0.8× / 2.4
Incidents · Mediterranean Sea - Eastern Basin	2	136.2	5	57	1.3× / 1.6
Nav aids · English Channellong running	2	126.2	4	714	1.7× / 1.2
Other · South Atlantic Oceanlong running	2	76.7	3	365	2.5× / 0.8
Surveys · Caribbean Seanew	2	51.4	2	38	new / 0
Spills · North Pacific Ocean	2	44	0	—	3.3× / 0.6
Spills · Gulf of Mexico	2	33	0	—	0.4× / 5.4
Restricted · North Atlantic Ocean	2	30.9	2	24	10× / 0.2
Cable ops · Singapore Straitnew	2	24.5	1	47	new / 0
Surveys · Mediterranean Sea - Eastern Basin	2	23.1	2	13	1.3× / 1.6
Cable ops · Malacca Straitnew	2	22.7	1	19	new / 0
Icebergs · South Pacific Ocean	2	16.5	2	32	10× / 0.2
Exercises · Baltic Seanew	2	12.5	0	—	new / 0
Exercises · Mediterranean Sea - Eastern Basin	2	9.4	1	10	1.0× / 2
Exercises · South Atlantic Ocean	2	9.2	0	—	0.4× / 5.4
Quakes · Solomon Sea	2	6	0	—	0.6× / 3.6
Quakes · Tasman Sea	2	1.4	2	0	5.0× / 0.4
Nav aids · Coral Sealong running	1	469.6	16	1,183	0.6× / 1.8
Wrecks · Persian Gulflong running	1	205.4	7	428	2.5× / 0.4
Wrecks · Mediterranean Sea - Eastern Basinlong running	1	205.3	7	1,189	5.0× / 0.2
Cable ops · South China Sea	1	139.4	5	203	0.3× / 3
Nav aids · South Atlantic Ocean	1	123.6	5	330	0.3× / 3
Nav aids · Arafura Sealong running	1	120.3	4	419	1.3× / 0.8
Nav aids · North Atlantic Oceanlong running	1	105.7	4	621	0.4× / 2.8
Surveys · North Atlantic Oceanlong running	1	96.8	3	543	0.6× / 1.8
Cable ops · North Sea	1	83.6	3	172	0.7× / 1.4
Wrecks · Indian Oceanlong running	1	80.1	3	1,028	new / 0
Cable ops · Indian Ocean	1	78.1	2	248	new / 0
Incidents · South Atlantic Ocean	1	75.6	2	78	0.2× / 4.4
Surveys · Bay of Bengal	1	74.7	3	185	2.5× / 0.4
Surveys · Indian Ocean	1	67.2	2	361	5.0× / 0.2
Nav aids · Celtic Sea	1	60.7	2	108	0.3× / 3.8
Structures · North Sealong running	1	55.5	2	405	new / 0
Cable ops · Persian Gulf	1	54.9	2	163	0.6× / 1.6
Restricted · North Sealong running	1	54.4	2	419	new / 0
Cable ops · Sea of Marmara	1	47.5	1	86	new / 0
Surveys · North Sealong running	1	46.1	1	510	0.8× / 1.2
Cable ops · Black Sea	1	39.4	0	—	1.7× / 0.6
Cable ops · Arabian Sea	1	34.5	2	86	0.6× / 1.6
Surveys · English Channel	1	34.3	1	36	0.7× / 1.4
Incidents · Adriatic Sea	1	33.8	2	32	new / 0
Surveys · Malacca Strait	1	30.1	1	47	new / 0
Other · Arctic Ocean	1	30	1	30	new / 0
Cable ops · Sea of Okhotsk	1	30	1	54	2.5× / 0.4
Surveys · Philippine Sea	1	29.6	0	—	0.5× / 2
Derelicts · North Atlantic Ocean	1	24.1	0	—	0.8× / 1.2
Cable ops · English Channel	1	19.5	1	19	new / 0
Cable ops · Eastern China Sea	1	19.4	1	19	1.7× / 0.6
Structures · Gulf of Mexico	1	17.4	1	17	new / 0
Spills · Chukchi Sea	1	14	0	—	new / 0
Spills · North Atlantic Ocean	1	14	0	—	0.6× / 1.8
Surveys · Bering Sea	1	12.4	1	12	5.0× / 0.2
Surveys · Timor Sea	1	12.3	0	—	new / 0
Cable ops · Bali Sea	1	8.6	1	8	new / 0
Derelicts · Mediterranean Sea - Western Basin	1	6.7	0	—	new / 0
Incidents · Bay of Biscay	1	6.1	0	—	5.0× / 0.2
Nav aids · Rio de La Plata	1	5.4	1	5	new / 0
Restricted · Black Sea	1	4.2	0	—	new / 0
Cable ops · Gulf of Suez	1	3.4	1	3	5.0× / 0.2
Exercises · Indian Ocean	1	3.2	0	—	0.5× / 2.2
Quakes · Gulf of California	1	3	0	—	5.0× / 0.2
Quakes · South Atlantic Ocean	1	3	0	—	0.3× / 3.4
Restricted · Bay of Biscay	1	2.4	1	2	new / 0
Exercises · Sea of Okhotsk	1	1.9	0	—	0.8× / 1.2
Exercises · Adriatic Sea	1	1.5	0	—	1.3× / 0.8
Ordnance · Baltic Sea	1	1.2	0	—	new / 0
Derelicts · South Atlantic Ocean	1	0.4	1	0	0.5× / 2
Surveys · Beaufort Sealong running	0	690	23	1,361	— / 0
Nav aids · South Pacific Oceanlong running	0	600	20	633	0.0× / 2.2
Nav aids · Arabian Sealong running	0	427.8	14	629	0.0× / 0.6
Surveys · Arctic Oceanlong running	0	390	13	1,361	— / 0
Nav aids · Indian Oceanlong running	0	360	12	503	0.0× / 2.2
Nav aids · Caribbean Sealong running	0	330	11	839	0.0× / 0.2
Nav aids · Bay of Bengallong running	0	240	8	839	0.0× / 0.6
Wrecks · North Sealong running	0	240	8	733	0.0× / 0.8
Nav aids · Mozambique Channellong running	0	210	7	901	0.0× / 0.4
Nav aids · North Pacific Oceanlong running	0	180	6	802	0.0× / 0.2
Surveys · Baffin Baylong running	0	150	5	1,459	— / 0
Nav aids · Irish Sea and St. George's Channellong running	0	150	5	570	0.0× / 3.8
Nav aids · Laccadive Sealong running	0	150	5	632	0.0× / 1
Structures · Mediterranean Sea - Eastern Basinlong running	0	150	5	465	0.0× / 0.2
Nav aids · Tasman Sealong running	0	150	5	596	0.0× / 0.8
Nav aids · Tyrrhenian Sealong running	0	150	5	1,046	0.0× / 2.4
Nav aids · Bass Straitlong running	0	120	4	377	0.0× / 0.8
Nav aids · Bering Sealong running	0	120	4	438	— / 0
Wrecks · English Channel	0	120	4	115	0.0× / 0.8
Nav aids · Mediterranean Sea - Western Basinlong running	0	120	4	527	0.0× / 1.2
Surveys · Sea of Okhotsk	0	120	4	126	0.0× / 0.2
Wrecks · South China Sealong running	0	120	4	1,074	0.0× / 0.4
Cable ops · Tasman Sealong running	0	120	4	609	— / 0
Cable ops · Bay of Bengal	0	117.4	3	307	0.0× / 0.8
Cable ops · Caribbean Sea	0	90	3	178	— / 0
Nav aids · Great Australian Bightlong running	0	90	3	391	0.0× / 1
Nav aids · Gulf of Mexicolong running	0	90	3	902	0.0× / 1.4
Surveys · Laptev Sealong running	0	90	3	495	— / 0
Ordnance · North Sea	0	90	3	142	0.0× / 0.8
Nav aids · Persian Gulflong running	0	90	3	407	0.0× / 0.4
Other · Persian Gulflong running	0	90	3	601	0.0× / 0.2
Other · South Pacific Oceanlong running	0	90	3	461	— / 0
Other · North Sea	0	62.8	2	57	0.0× / 0.8
Nav aids · Andaman or Burma Sealong running	0	60	2	697	0.0× / 0.4
Derelicts · Arabian Sea	0	60	2	96	0.0× / 0.2
Other · Arabian Sealong running	0	60	2	592	— / 0
Wrecks · Arabian Sealong running	0	60	2	526	— / 0
Quakes · Bay of Bengal	0	60	2	293	0.0× / 0.2
Wrecks · Bay of Bengallong running	0	60	2	485	— / 0
Cable ops · Celtic Sea	0	60	2	236	0.0× / 0.6
Incidents · Coral Sea	0	60	2	44	0.0× / 2.4
Wrecks · Coral Sealong running	0	60	2	613	— / 0
Cable ops · Gulf of Guinea	0	60	2	195	— / 0
Incidents · Gulf of Guinea	0	60	2	345	0.0× / 0.6
Nav aids · Gulf of Suez	0	60	2	290	0.0× / 0.6
Other · Indian Oceanlong running	0	60	2	556	0.0× / 0.2
Exercises · Ionian Sea	0	60	2	261	0.0× / 1.6
Nav aids · Mediterranean Sea - Eastern Basinlong running	0	60	2	1,136	0.0× / 0.6
Other · Mediterranean Sea - Eastern Basin	0	60	2	164	0.0× / 1.4
Volcanic · Philippine Sea	0	60	2	361	— / 0
Wrecks · Philippine Sealong running	0	60	2	538	— / 0
Nav aids · Sea of Okhotsklong running	0	60	2	467	0.0× / 0.4
Other · South China Sealong running	0	60	2	473	0.0× / 0.2
Volcanic · South Pacific Ocean	0	60	2	239	— / 0
Wrecks · South Pacific Oceanlong running	0	60	2	380	0.0× / 0.2
Wrecks · Tasman Sealong running	0	60	2	499	— / 0
Surveys · The Northwestern Passages	0	60	2	344	— / 0
Ordnance · Tyrrhenian Sea	0	60	2	318	0.0× / 0.2
Wrecks · Tyrrhenian Sealong running	0	60	2	558	— / 0
Surveys · Gulf of Suezlong running	0	56.6	1	439	0.0× / 0.2
Wrecks · Laccadive Sea	0	55.4	1	228	— / 0
Incidents · Bay of Bengal	0	35.3	1	66	0.0× / 1.8
Restricted · Alboran Sea	0	30	1	62	— / 0
Surveys · Arabian Sealong running	0	30	1	628	— / 0
Incidents · Arafura Sea	0	30	1	58	0.0× / 0.2
Debris · Arctic Oceanlong running	0	30	1	1,013	— / 0
Nav aids · Baltic Sea	0	30	1	104	— / 0
Volcanic · Banda Sea	0	30	1	181	— / 0
Cable ops · Bass Strait	0	30	1	60	0.0× / 0.6
Other · Bay of Bengal	0	30	1	335	— / 0
Restricted · Bay of Bengallong running	0	30	1	530	— / 0
Ordnance · Black Sea	0	30	1	125	— / 0
Towing · Black Sea	0	30	1	52	0.0× / 0.2
Wrecks · Black Sea	0	30	1	62	— / 0
Other · Caribbean Sea	0	30	1	81	— / 0
Restricted · Caribbean Sea	0	30	1	229	— / 0
Wrecks · Caribbean Sea	0	30	1	335	— / 0
Surveys · Chukchi Sealong running	0	30	1	894	— / 0
Other · Coral Sea	0	30	1	203	0.0× / 0.2
Other · Eastern China Sealong running	0	30	1	552	— / 0
Other · English Channel	0	30	1	89	0.0× / 0.4
Surveys · Greenland Sealong running	0	30	1	1,677	— / 0
Wrecks · Gulf of Guinea	0	30	1	352	— / 0
Other · Gulf of Mexicolong running	0	30	1	678	0.0× / 0.2
Other · Gulf of Suezlong running	0	30	1	576	— / 0
Structures · Gulf of Suez	0	30	1	165	— / 0
Other · Gulf of Thailand	0	30	1	290	— / 0
Restricted · Indian Oceanlong running	0	30	1	889	0.0× / 0.4
Wrecks · Inner Seas off the West Coast of Scotland	0	30	1	56	— / 0
Nav aids · Ionian Sealong running	0	30	1	521	0.0× / 0.4
Incidents · Ionian Sea	0	30	1	47	0.0× / 0.2
Wrecks · Irish Sea and St. George's Channellong running	0	30	1	1,116	0.0× / 0.4
Cable ops · Japan Sea	0	30	1	48	— / 0
Other · Kattegat	0	30	1	90	— / 0
Nav aids · Malacca Straitlong running	0	30	1	731	0.0× / 0.2
Wrecks · Malacca Straitlong running	0	30	1	551	— / 0
Restricted · Mediterranean Sea - Eastern Basinlong running	0	30	1	481	— / 0
Other · North Atlantic Ocean	0	30	1	151	0.0× / 1.6
Wrecks · North Atlantic Oceanlong running	0	30	1	605	0.0× / 0.2
Restricted · North Pacific Oceanlong running	0	30	1	496	— / 0

Cite: seahazards.com Sea Ledger, 2007-09, 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.