Sea Ledger, October 2001

2001-10-01 to 2001-10-31 · archive

issued: 339
warning-days in force: 7,366
in force at month end: 236
sea × type cells: 204

baseline: same month, previous 5 years (2000-10, 1999-10, 1998-10, 1997-10)

By type

type	issued	warning-days	in force at end
Cable ops	55	894.4	31
Incidents	54	1,183	34
Nav aids	45	2,537.1	81
Exercises	36	290.7	10
Quakes	35	103	4
Other	33	774.2	24
Surveys	29	263.4	11
Ordnance	14	80	3
Wrecks	9	868.7	28
Derelicts	7	46	2
Debris	6	37.5	0
Missiles	5	62	2
Spills	3	46	1
Containers	3	18.5	0
Icebergs	2	17.9	0
Mines	1	6.5	0
Structures	1	21.2	1
Volcanic	1	43.7	2
War risk	0	62	2
Towing	0	10	0

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	23	97.8	2	40	1.3× / 17.75
Quakes · South Pacific Ocean	10	30.1	1	31	0.9× / 11.5
Quakes · North Pacific Ocean	9	27	0	—	1.9× / 4.75
Nav aids · North Sealong running	8	231.8	9	590	1.6× / 5
Incidents · South Pacific Oceansurge	8	188.2	5	70	8.0× / 1
Nav aids · South Atlantic Oceanlong running	7	384.3	11	455	1.6× / 4.5
Incidents · North Pacific Oceansurge	7	328	9	71	2.0× / 3.5
Incidents · North Atlantic Ocean	7	114.4	2	74	1.6× / 4.5
Surveys · Mediterranean Sea - Eastern Basinsurge	7	39.5	3	26	14× / 0.5
Incidents · Coral Seasurge	7	1.8	0	—	14× / 0.5
Nav aids · Tyrrhenian Seasurge	6	160.6	4	190	2.4× / 2.5
Cable ops · South China Seanew	6	123.2	5	274	new / 0
Incidents · Indian Oceansurge	6	84.1	4	36	2.4× / 2.5
Cable ops · Eastern China Seanew	6	74.6	4	63	new / 0
Ordnance · North Atlantic Oceansurge	6	26.3	0	—	4.8× / 1.25
Other · North Atlantic Oceansurge	6	24	2	37	12× / 0.5
Exercises · North Pacific Ocean	6	16.7	0	—	1.7× / 3.5
Surveys · Celtic Seasurge	6	8	0	—	8.0× / 0.75
Exercises · Aegean Seasurge	5	115.1	2	302	2.0× / 2.5
Wrecks · English Channelsurgelong running	5	114.4	5	854	20× / 0.25
Missiles · North Pacific Oceansurge	5	62	2	35	2.0× / 2.5
Other · North Pacific Oceansurge	5	20.5	1	30	20× / 0.25
Other · Indian Oceannew	5	4.6	0	—	new / 0
Incidents · Philippine Seasurge	4	48.8	3	56	4.0× / 1
Cable ops · North Sea	4	14.2	0	—	1.3× / 3
Exercises · Gulf of Mexicosurge	4	5.6	0	—	5.3× / 0.75
Incidents · South Atlantic Ocean	4	1.7	0	—	1.6× / 2.5
Nav aids · Coral Seasurgelong running	3	159.6	5	559	2.4× / 1.25
Nav aids · North Atlantic Oceanlong running	3	126.1	5	431	1.3× / 2.25
Nav aids · Inner Seas off the West Coast of Scotlandsurgelong running	3	47.7	2	554	4.0× / 0.75
Exercises · North Atlantic Ocean	3	35.6	1	29	0.6× / 5.5
Other · Tyrrhenian Seasurge	3	27.4	0	—	4.0× / 0.75
Surveys · Tyrrhenian Seasurge	3	26.1	1	55	12× / 0.25
Surveys · Ionian Seasurge	3	22.9	1	40	12× / 0.25
Exercises · Mediterranean Sea - Eastern Basinsurge	3	16.8	2	21	2.4× / 1.25
Exercises · Ionian Seasurge	3	14.5	1	29	4.0× / 0.75
Exercises · Black Seasurge	3	11.6	1	196	2.4× / 1.25
Quakes · Banda Sea	3	9	0	—	1.7× / 1.75
Quakes · Indian Oceansurge	3	6.1	1	17	2.4× / 1.25
Other · Japan Sea	2	100.2	3	56	8.0× / 0.25
Nav aids · Celtic Sea	2	84.4	3	204	8.0× / 0.25
Other · English Channelnew	2	59.7	2	132	new / 0
Cable ops · Persian Gulflong running	2	55.7	2	387	2.0× / 1
Incidents · Mediterranean Sea - Eastern Basin	2	44.3	2	23	4.0× / 0.5
Exercises · Tyrrhenian Sea	2	34.7	1	33	8.0× / 0.25
Surveys · Ligurian Sea	2	24	2	47	8.0× / 0.25
Ordnance · North Pacific Ocean	2	22.6	1	20	1.6× / 1.25
Other · Tasman Seanew	2	15.4	1	23	new / 0
Exercises · South Atlantic Ocean	2	14.2	0	—	8.0× / 0.25
Debris · Philippine Seanew	2	13.4	0	—	new / 0
Cable ops · Ionian Sea	2	12.7	0	—	4.0× / 0.5
Containers · South Atlantic Oceannew	2	12.3	0	—	new / 0
Ordnance · Tyrrhenian Sea	2	10.8	1	19	4.0× / 0.5
Derelicts · North Atlantic Ocean	2	9.7	2	6	4.0× / 0.5
Derelicts · South Atlantic Ocean	2	8.2	0	—	8.0× / 0.25
Ordnance · Eastern China Seanew	2	7.9	0	—	new / 0
Nav aids · Indian Ocean	2	6.8	0	—	2.0× / 1
Debris · Timor Seanew	2	6.8	0	—	new / 0
Cable ops · North Pacific Ocean	2	6.4	1	6	4.0× / 0.5
Quakes · Molukka Sea	2	6	0	—	4.0× / 0.5
Quakes · North Atlantic Ocean	2	6	0	—	1.0× / 2
Other · Irish Sea and St. George's Channelnew	2	3.8	0	—	new / 0
Surveys · Bristol Channelnew	2	1.9	0	—	new / 0
Nav aids · English Channellong running	1	160.3	5	380	0.3× / 4
Cable ops · Caribbean Sea	1	133.5	5	72	4.0× / 0.25
Nav aids · North Pacific Ocean	1	96	3	364	2.0× / 0.5
Wrecks · Tyrrhenian Sealong running	1	62.8	2	1,105	4.0× / 0.25
Nav aids · South Pacific Oceanlong running	1	54.4	2	385	0.8× / 1.25
Cable ops · Bay of Bengal	1	53.5	1	44	new / 0
Cable ops · Philippine Sea	1	45.4	1	55	new / 0
Cable ops · North Atlantic Ocean	1	44.9	1	62	0.4× / 2.25
Volcanic · Philippine Sea	1	43.7	2	40	new / 0
Other · South Atlantic Ocean	1	40.9	1	239	2.0× / 0.5
Other · Yellow Sea	1	35.1	1	33	1.0× / 1
Nav aids · Great Australian Bight	1	31.3	1	195	new / 0
Other · Arabian Sea	1	30.9	1	30	new / 0
Wrecks · Sea of Okhotsk	1	30.3	1	30	new / 0
Incidents · Adriatic Sea	1	30.2	1	30	1.3× / 0.75
Surveys · Philippine Sea	1	28.3	1	32	4.0× / 0.25
Incidents · Laccadive Sea	1	22.4	1	22	4.0× / 0.25
Structures · Mediterranean Sea - Eastern Basin	1	21.2	1	21	4.0× / 0.25
Wrecks · North Pacific Ocean	1	20.4	1	20	new / 0
Other · Black Sea	1	16.4	1	16	new / 0
Nav aids · Gulf of Alaska	1	15.4	0	—	new / 0
Surveys · Bass Strait	1	14.7	0	—	new / 0
Spills · North Pacific Ocean	1	14	0	—	0.8× / 1.25
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	14	0	—	new / 0
Derelicts · Timor Sea	1	12.4	0	—	new / 0
Surveys · Black Sea	1	12.3	0	—	new / 0
Icebergs · South Atlantic Ocean	1	11.8	0	—	0.3× / 3
Spills · North Atlantic Ocean	1	11	1	35	0.8× / 1.25
Exercises · Malacca Strait	1	9.1	0	—	new / 0
Cable ops · Coral Sea	1	8.9	1	8	new / 0
Nav aids · Rio de La Plata	1	8.4	1	8	new / 0
Cable ops · Inner Seas off the West Coast of Scotland	1	8	0	—	new / 0
Ordnance · Mediterranean Sea - Eastern Basin	1	7.4	1	7	new / 0
Quakes · Coral Sea	1	6.9	0	—	0.7× / 1.5
Wrecks · Black Sea	1	6.8	0	—	new / 0
Debris · North Atlantic Ocean	1	6.6	0	—	1.0× / 1
Mines · Black Sea	1	6.5	0	—	new / 0
Other · Bay of Bengal	1	6.4	0	—	new / 0
Derelicts · South Pacific Ocean	1	6.4	0	—	2.0× / 0.5
Debris · Indian Ocean	1	6.3	0	—	new / 0
Derelicts · Indian Ocean	1	6.3	0	—	4.0× / 0.25
Containers · North Atlantic Ocean	1	6.2	0	—	1.3× / 0.75
Icebergs · South Pacific Ocean	1	6.1	0	—	new / 0
Nav aids · Persian Gulf	1	5.8	0	—	2.0× / 0.5
Incidents · Japan Sea	1	5.6	0	—	4.0× / 0.25
Incidents · Malacca Strait	1	5.5	1	5	new / 0
Exercises · Bay of Bengal	1	5.1	0	—	new / 0
Ordnance · Philippine Sea	1	5	0	—	new / 0
Exercises · Arabian Sea	1	4.7	1	33	2.0× / 0.5
Surveys · South Atlantic Ocean	1	4.6	1	4	0.7× / 1.5
Cable ops · Java Sea	1	4	1	3	new / 0
Quakes · Bismarck Sea	1	3	0	—	4.0× / 0.25
Cable ops · English Channel	1	3	0	—	4.0× / 0.25
Quakes · Sea of Okhotsk	1	3	0	—	4.0× / 0.25
Quakes · South Atlantic Ocean	1	3	0	—	0.4× / 2.75
Nav aids · Ionian Sea	1	2.7	0	—	new / 0
Cable ops · Arabian Sea	1	2.4	1	2	4.0× / 0.25
Nav aids · Ligurian Sea	1	2	0	—	new / 0
Exercises · South Pacific Ocean	1	2	1	1	new / 0
Quakes · Solomon Sea	1	1.8	1	32	0.4× / 2.25
Surveys · Mediterranean Sea - Western Basin	1	1.3	0	—	4.0× / 0.25
Exercises · Adriatic Sea	1	1.1	0	—	0.2× / 5
Quakes · Eastern China Sea	1	1.1	1	1	1.0× / 1
Nav aids · Tasman Sea	1	1.1	0	—	4.0× / 0.25
Surveys · Alboran Sea	1	0.8	0	—	new / 0
Cable ops · Bristol Channel	1	0.5	1	0	new / 0
Incidents · Arabian Sea	1	0.4	0	—	2.0× / 0.5
Other · Coral Sea	1	0.2	0	—	new / 0
Nav aids · Gulf of Mexico	1	0.2	0	—	new / 0
Incidents · North Sea	1	0.2	0	—	1.0× / 1
Incidents · Gulf of Aden	1	0.1	0	—	new / 0
Incidents · Celtic Sea	1	0	0	—	4.0× / 0.25
Incidents · Mediterranean Sea - Western Basin	1	0	0	—	new / 0
Nav aids · Mozambique Channellong running	0	186	6	425	0.0× / 0.25
Incidents · South China Sea	0	101.4	1	53	0.0× / 1.75
Nav aids · Irish Sea and St. George's Channellong running	0	93	3	546	0.0× / 0.75
Wrecks · North Sealong running	0	93	3	605	— / 0
Nav aids · Singapore Strait	0	93	3	232	— / 0
Wrecks · Bay of Bengal	0	62	2	111	— / 0
Wrecks · Coral Sea	0	62	2	268	0.0× / 0.25
Cable ops · Gulf of Mexico	0	62	2	116	— / 0
Other · North Sealong running	0	62	2	576	0.0× / 0.75
Other · Persian Gulf	0	62	2	50	0.0× / 0.25
War risk · Persian Gulf	0	62	2	272	— / 0
Wrecks · Red Sealong running	0	62	2	540	— / 0
Nav aids · South China Sea	0	62	2	139	— / 0
Wrecks · South China Sealong running	0	62	2	582	0.0× / 0.25
Wrecks · Baltic Sea	0	56.5	1	306	— / 0
Cable ops · Black Sea	0	51	1	203	0.0× / 0.25
Wrecks · Persian Gulf	0	50.5	1	132	0.0× / 0.75
Cable ops · Mediterranean Sea - Eastern Basin	0	48.3	1	45	0.0× / 1.5
Incidents · Sea of Okhotsk	0	46.5	1	62	0.0× / 0.5
Cable ops · Adriatic Sea	0	31	1	35	— / 0
Nav aids · Adriatic Sea	0	31	1	152	— / 0
Other · Adriatic Sealong running	0	31	1	545	0.0× / 0.25
Surveys · Adriatic Sea	0	31	1	52	— / 0
Nav aids · Andaman or Burma Sea	0	31	1	274	0.0× / 0.75
Nav aids · Arabian Sea	0	31	1	111	— / 0
Surveys · Bay of Bengal	0	31	1	84	— / 0
Wrecks · Bay of Biscay	0	31	1	347	— / 0
Nav aids · Bering Sea	0	31	1	90	— / 0
Other · Bering Sea	0	31	1	89	— / 0
Nav aids · Bismarck Sea	0	31	1	181	— / 0
Nav aids · Caribbean Sea	0	31	1	153	— / 0
Nav aids · Eastern China Sealong running	0	31	1	373	0.0× / 0.25
Other · Greenland Sealong running	0	31	1	434	— / 0
Other · Gulf of Mexico	0	31	1	107	— / 0
Nav aids · Gulf of Suez	0	31	1	62	0.0× / 0.25
Incidents · Ionian Sea	0	31	1	44	— / 0
Incidents · Irish Sea and St. George's Channel	0	31	1	37	— / 0
Wrecks · Irish Sea and St. George's Channellong running	0	31	1	485	— / 0
Wrecks · Kattegat	0	31	1	254	— / 0
Nav aids · Laccadive Sea	0	31	1	188	— / 0
Nav aids · Malacca Straitlong running	0	31	1	688	0.0× / 0.25
Wrecks · Malacca Strait	0	31	1	127	— / 0
Nav aids · Mediterranean Sea - Western Basin	0	31	1	34	— / 0
Incidents · Persian Gulf	0	31	1	45	0.0× / 0.25
Nav aids · Philippine Sea	0	31	1	139	— / 0
Incidents · Red Sea	0	31	1	36	— / 0
Other · Rio de La Plata	0	31	1	41	— / 0
Nav aids · Skagerrak	0	31	1	120	— / 0
Wrecks · Skagerrak	0	31	1	357	— / 0
Nav aids · Solomon Sea	0	31	1	213	— / 0
Other · South China Sealong running	0	31	1	799	0.0× / 0.5
Other · South Pacific Ocean	0	31	1	31	— / 0
Wrecks · South Pacific Ocean	0	31	1	120	— / 0
Nav aids · Sulu Sea	0	31	1	292	0.0× / 0.25
Nav aids · Timor Sealong running	0	31	1	645	0.0× / 0.25
Other · Mediterranean Sea - Eastern Basin	0	30	0	—	0.0× / 0.25
Nav aids · Mediterranean Sea - Eastern Basin	0	28.2	0	—	0.0× / 0.25
Other · Caribbean Sea	0	17.7	0	—	— / 0
Surveys · Yellow Sea	0	17	0	—	— / 0
Incidents · Mozambique Channel	0	15.5	0	—	— / 0
Incidents · Tasman Sea	0	15.5	0	—	0.0× / 1
Cable ops · Celtic Sea	0	13.4	0	—	0.0× / 0.25
Towing · Sea of Okhotsk	0	10	0	—	— / 0
Spills · Gulf of Mexico	0	7	0	—	0.0× / 2.25

Cite: seahazards.com Sea Ledger, 2001-10, 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.