Sea Ledger, November 2001

2001-11-01 to 2001-11-30 · archive

issued: 345
warning-days in force: 7,051
in force at month end: 231
sea × type cells: 211

baseline: same month, previous 5 years (2000-11, 1999-11, 1998-11, 1997-11)

By type

type	issued	warning-days	in force at end
Incidents	70	1,011.7	33
Cable ops	63	905.8	29
Exercises	49	286.7	9
Nav aids	46	2,320.7	78
Surveys	22	345.7	12
Quakes	21	67.3	3
Other	19	731.7	18
Wrecks	8	843.6	28
Debris	8	45.8	2
Ordnance	7	91	2
Icebergs	7	33.1	2
Derelicts	6	33.3	2
Missiles	6	60	2
Containers	5	28.9	1
Spills	5	62	4
Structures	1	50.5	2
Mines	1	5.8	0
Towing	1	7.5	0
War risk	0	60	2
Volcanic	0	60	2

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	25	77.4	3	70	1.3× / 20
Exercises · North Pacific Oceansurge	11	42.1	3	28	3.1× / 3.5
Incidents · North Pacific Oceansurge	10	223.7	6	73	2.5× / 4
Quakes · South Pacific Ocean	10	27.7	2	30	0.7× / 14.25
Incidents · Indian Oceansurge	8	133	6	66	3.2× / 2.5
Incidents · South China Seasurge	8	66.8	2	65	3.2× / 2.5
Incidents · Coral Seasurge	8	13.4	1	17	3.2× / 2.5
Incidents · Philippine Seasurge	7	152.8	5	43	14× / 0.5
Nav aids · South Atlantic Oceanlong running	6	353.1	11	485	1.4× / 4.25
Missiles · North Pacific Oceansurge	6	60	2	36	2.4× / 2.5
Cable ops · Celtic Seasurge	6	28.8	2	21	2.4× / 2.5
Exercises · South Pacific Oceansurge	6	8.3	2	31	24× / 0.25
Nav aids · Tyrrhenian Sea	5	102.1	3	220	1.7× / 3
Nav aids · South Pacific Oceansurgelong running	5	100.4	5	415	5.0× / 1
Nav aids · North Atlantic Oceansurgelong running	5	98.4	3	461	2.9× / 1.75
Incidents · North Atlantic Ocean	5	47.1	3	71	1.8× / 2.75
Icebergs · Southern Oceannew	5	32.6	0	—	new / 0
Surveys · Celtic Sea	5	16.5	0	—	1.0× / 5
Exercises · North Atlantic Ocean	5	12.1	0	—	1.5× / 3.25
Nav aids · North Sealong running	4	239.5	9	620	0.8× / 5.25
Cable ops · Bay of Bengalnew	4	86.8	3	53	new / 0
Exercises · Aegean Seasurge	4	84.8	2	332	2.0× / 2
Wrecks · South China Seasurgelong running	4	80.1	4	612	16× / 0.25
Nav aids · Inner Seas off the West Coast of Scotlandsurgelong running	4	49.6	1	584	2.3× / 1.75
Exercises · Mediterranean Sea - Western Basinsurge	4	9.7	0	—	2.7× / 1.5
Cable ops · North Sea	4	7.4	0	—	1.4× / 2.75
Cable ops · Bass Straitnew	4	6.1	0	—	new / 0
Incidents · Tasman Seasurge	4	1.8	0	—	5.3× / 0.75
Incidents · South Pacific Ocean	3	84.2	1	75	1.0× / 3
Surveys · Mediterranean Sea - Eastern Basinsurge	3	62.1	1	34	4.0× / 0.75
Other · Yellow Seasurge	3	56.9	1	34	12× / 0.25
Surveys · Tyrrhenian Sea	3	47.4	3	36	1.5× / 2
Incidents · Japan Seasurge	3	45.7	3	26	12× / 0.25
Surveys · South Atlantic Ocean	3	44	2	34	1.5× / 2
Spills · North Pacific Oceansurge	3	33	2	18	4.0× / 0.75
Incidents · South Atlantic Ocean	3	23.6	1	25	1.5× / 2
Derelicts · North Atlantic Oceansurge	3	21.3	1	36	4.0× / 0.75
Exercises · Mediterranean Sea - Eastern Basin	3	19	0	—	1.5× / 2
Cable ops · Mediterranean Sea - Western Basinnew	3	15.9	0	—	new / 0
Cable ops · Mediterranean Sea - Eastern Basinsurge	3	14.4	1	75	12× / 0.25
Quakes · North Pacific Ocean	3	8.4	1	20	0.7× / 4.5
Exercises · South Atlantic Ocean	3	8.3	1	22	1.3× / 2.25
Ordnance · Philippine Seanew	3	4.9	0	—	new / 0
Incidents · Arafura Seasurge	3	0.3	0	—	12× / 0.25
Nav aids · English Channellong running	2	148.7	5	410	1.1× / 1.75
Cable ops · South China Sea	2	146.5	4	304	4.0× / 0.5
Cable ops · Eastern China Seanew	2	133.2	2	46	new / 0
Other · Japan Sea	2	95.5	2	86	4.0× / 0.5
Cable ops · Java Seanew	2	55.2	2	33	new / 0
Nav aids · Adriatic Seanew	2	36.5	3	182	new / 0
Exercises · Tyrrhenian Sea	2	33	0	—	1.1× / 1.75
Incidents · Mozambique Channelnew	2	28.6	1	28	new / 0
Nav aids · Mediterranean Sea - Western Basin	2	24	1	64	8.0× / 0.25
Nav aids · Ionian Seanew	2	22.9	1	27	new / 0
Exercises · Bay of Bengal	2	21.7	0	—	8.0× / 0.25
Other · Ionian Seanew	2	21.3	0	—	new / 0
Nav aids · Tasman Sea	2	17.6	0	—	2.7× / 0.75
Exercises · Black Sea	2	16.1	0	—	8.0× / 0.25
Spills · Gulf of Mexico	2	16	2	12	0.5× / 4.25
Containers · Ionian Seanew	2	12.2	0	—	new / 0
Exercises · Adriatic Sea	2	11.4	0	—	0.7× / 2.75
Exercises · Ligurian Sea	2	7.2	0	—	1.6× / 1.25
Quakes · Southern Ocean	2	6	0	—	4.0× / 0.5
Debris · North Atlantic Ocean	2	5.9	0	—	8.0× / 0.25
Icebergs · North Atlantic Oceannew	2	0.5	2	0	new / 0
Nav aids · Mozambique Channellong running	1	151	4	455	new / 0
Wrecks · North Sealong running	1	108.2	4	635	2.0× / 0.5
Wrecks · Tyrrhenian Sealong running	1	62.5	2	1,135	new / 0
Cable ops · Persian Gulflong running	1	51	2	417	1.3× / 0.75
Incidents · Mediterranean Sea - Eastern Basin	1	45.1	0	—	1.0× / 1
Other · South Atlantic Ocean	1	44	1	269	new / 0
Nav aids · Gulf of Suez	1	41.6	2	92	new / 0
Nav aids · Arabian Sea	1	35.9	1	141	new / 0
Other · Adriatic Sealong running	1	35	1	575	4.0× / 0.25
Other · South China Sealong running	1	30.7	1	829	4.0× / 0.25
Other · North Pacific Ocean	1	30.5	0	—	2.0× / 0.5
Other · North Atlantic Ocean	1	29.4	1	31	1.0× / 1
Surveys · Inner Seas off the West Coast of Scotland	1	27.6	1	27	new / 0
Incidents · Bay of Biscay	1	20.9	1	20	1.3× / 0.75
Structures · South China Sea	1	20.5	1	20	new / 0
Other · Arabian Sea	1	18.2	0	—	new / 0
Incidents · Java Sea	1	17.9	1	17	new / 0
Surveys · Ligurian Sea	1	17.9	0	—	4.0× / 0.25
Debris · South Pacific Ocean	1	16.5	1	16	4.0× / 0.25
Incidents · Adriatic Sea	1	15.6	0	—	new / 0
Wrecks · Celtic Sea	1	14.4	1	14	new / 0
Wrecks · Inner Seas off the West Coast of Scotland	1	13.4	0	—	new / 0
Cable ops · Singapore Strait	1	10.5	1	10	new / 0
Surveys · Persian Gulf	1	10.2	1	10	new / 0
Surveys · North Pacific Ocean	1	9.6	0	—	new / 0
Cable ops · Adriatic Sea	1	9.2	1	65	new / 0
Cable ops · Ionian Sea	1	8.7	0	—	new / 0
Surveys · Singapore Strait	1	8.4	1	8	new / 0
Incidents · Bay of Bengal	1	8	1	7	4.0× / 0.25
Towing · North Pacific Ocean	1	7.5	0	—	new / 0
Cable ops · Aegean Sea	1	7.4	1	7	new / 0
Other · Coral Sea	1	7.4	0	—	new / 0
Surveys · Gulf of Suez	1	7.4	1	7	new / 0
Containers · North Pacific Ocean	1	7	0	—	4.0× / 0.25
Containers · North Atlantic Ocean	1	6.7	0	—	0.7× / 1.5
Cable ops · Indian Ocean	1	6.4	1	6	new / 0
Debris · Timor Sea	1	6.4	0	—	new / 0
Derelicts · South Atlantic Ocean	1	6.3	0	—	1.0× / 1
Debris · North Sea	1	6.2	0	—	new / 0
Debris · Indian Ocean	1	6.1	0	—	new / 0
Nav aids · Mediterranean Sea - Eastern Basin	1	5.9	0	—	1.3× / 0.75
Exercises · Arabian Sea	1	5.8	0	—	new / 0
Mines · Celtic Sea	1	5.8	0	—	4.0× / 0.25
Nav aids · Indian Ocean	1	5.8	0	—	4.0× / 0.25
Derelicts · Philippine Sea	1	5	1	4	new / 0
Exercises · Malacca Strait	1	4.4	1	4	new / 0
Nav aids · Persian Gulf	1	3.9	0	—	0.6× / 1.75
Incidents · Persian Gulf	1	3.8	0	—	new / 0
Ordnance · Arabian Sea	1	3.4	0	—	new / 0
Cable ops · Tyrrhenian Sea	1	3.4	0	—	1.3× / 0.75
Debris · English Channel	1	3.3	1	3	new / 0
Other · Indian Ocean	1	3.3	0	—	2.0× / 0.5
Quakes · Banda Sea	1	3	0	—	0.6× / 1.75
Quakes · Bering Sea	1	3	0	—	4.0× / 0.25
Quakes · Caribbean Sea	1	3	0	—	new / 0
Quakes · North Atlantic Ocean	1	3	0	—	2.0× / 0.5
Quakes · Philippine Sea	1	3	0	—	0.4× / 2.25
Quakes · South Atlantic Ocean	1	3	0	—	1.0× / 1
Containers · Tyrrhenian Sea	1	3	1	2	new / 0
Exercises · Ionian Sea	1	2.8	0	—	1.3× / 0.75
Surveys · North Sea	1	2.2	0	—	0.2× / 5
Surveys · Bristol Channel	1	1.9	0	—	new / 0
Other · Bristol Channel	1	1.8	0	—	new / 0
Other · Ligurian Sea	1	1.7	0	—	new / 0
Debris · Great Australian Bight	1	1.4	0	—	new / 0
Other · Mediterranean Sea - Eastern Basin	1	1.3	0	—	4.0× / 0.25
Cable ops · English Channel	1	0.9	0	—	0.8× / 1.25
Ordnance · Persian Gulf	1	0.9	0	—	2.0× / 0.5
Nav aids · Bristol Channel	1	0.8	0	—	new / 0
Derelicts · Arabian Sea	1	0.7	0	—	4.0× / 0.25
Ordnance · Japan Sea	1	0.7	0	—	new / 0
Ordnance · South Pacific Ocean	1	0.3	0	—	new / 0
Other · Tyrrhenian Sea	1	0.3	1	0	2.0× / 0.5
Wrecks · English Channellong running	0	150	5	884	0.0× / 0.75
Nav aids · Coral Sealong running	0	128.5	4	589	0.0× / 1
Nav aids · Singapore Strait	0	90	3	262	— / 0
Nav aids · Celtic Sea	0	61.5	2	234	0.0× / 1.25
Nav aids · Irish Sea and St. George's Channellong running	0	61.5	2	576	0.0× / 2.5
Nav aids · North Pacific Ocean	0	61.5	2	273	0.0× / 0.75
Wrecks · Coral Sea	0	60	2	298	0.0× / 0.25
Other · English Channel	0	60	2	58	0.0× / 0.25
Cable ops · Gulf of Mexico	0	60	2	146	— / 0
Other · North Sealong running	0	60	2	606	0.0× / 0.25
War risk · Persian Gulf	0	60	2	302	— / 0
Volcanic · Philippine Sea	0	60	2	70	— / 0
Nav aids · South China Sea	0	60	2	169	— / 0
Other · Persian Gulf	0	39.4	1	80	0.0× / 0.5
Wrecks · Bay of Bengal	0	38	0	—	— / 0
Cable ops · Caribbean Sea	0	36	1	102	0.0× / 0.25
Wrecks · Red Sealong running	0	31.5	1	570	— / 0
Surveys · Adriatic Sea	0	30	1	82	— / 0
Nav aids · Andaman or Burma Sea	0	30	1	304	0.0× / 0.25
Cable ops · Arabian Sea	0	30	1	32	0.0× / 1
Wrecks · Baltic Sea	0	30	1	336	— / 0
Surveys · Bay of Bengal	0	30	1	114	— / 0
Wrecks · Bay of Biscaylong running	0	30	1	377	0.0× / 0.25
Nav aids · Bering Sea	0	30	1	120	— / 0
Other · Bering Sea	0	30	1	119	— / 0
Nav aids · Bismarck Sea	0	30	1	211	— / 0
Cable ops · Black Sea	0	30	1	233	0.0× / 0.25
Other · Black Sea	0	30	1	46	— / 0
Nav aids · Caribbean Sea	0	30	1	183	— / 0
Nav aids · Eastern China Sealong running	0	30	1	403	— / 0
Nav aids · Great Australian Bight	0	30	1	225	0.0× / 0.5
Other · Greenland Sealong running	0	30	1	464	— / 0
Other · Gulf of Mexico	0	30	1	137	— / 0
Wrecks · Irish Sea and St. George's Channellong running	0	30	1	515	— / 0
Wrecks · Kattegat	0	30	1	284	— / 0
Nav aids · Laccadive Sea	0	30	1	218	0.0× / 0.25
Nav aids · Malacca Straitlong running	0	30	1	718	— / 0
Incidents · Malacca Strait	0	30	1	35	— / 0
Wrecks · Malacca Strait	0	30	1	157	— / 0
Ordnance · Mediterranean Sea - Eastern Basin	0	30	1	37	— / 0
Structures · Mediterranean Sea - Eastern Basin	0	30	1	51	— / 0
Cable ops · North Atlantic Ocean	0	30	1	92	0.0× / 3
Ordnance · North Pacific Ocean	0	30	1	50	0.0× / 0.25
Wrecks · North Pacific Ocean	0	30	1	50	— / 0
Wrecks · Persian Gulf	0	30	1	162	0.0× / 0.25
Nav aids · Philippine Sea	0	30	1	169	— / 0
Nav aids · Rio de La Plata	0	30	1	38	0.0× / 0.25
Other · Rio de La Plata	0	30	1	71	— / 0
Wrecks · Sea of Okhotsk	0	30	1	60	— / 0
Nav aids · Skagerrak	0	30	1	150	— / 0
Wrecks · Skagerraklong running	0	30	1	387	0.0× / 0.25
Nav aids · Solomon Sea	0	30	1	243	— / 0
Nav aids · Sulu Sea	0	30	1	322	— / 0
Nav aids · Timor Sealong running	0	30	1	675	— / 0
Other · Tasman Sea	0	29.5	0	—	— / 0
Cable ops · North Pacific Ocean	0	25	0	—	0.0× / 0.75
Surveys · Philippine Sea	0	25	0	—	0.0× / 0.25
Incidents · Laccadive Sea	0	22.4	0	—	0.0× / 0.25
Ordnance · Tyrrhenian Sea	0	20.8	0	—	0.0× / 0.5
Other · South Pacific Ocean	0	15.5	0	—	0.0× / 0.5
Wrecks · South Pacific Ocean	0	15.5	0	—	0.0× / 0.5
Spills · North Atlantic Ocean	0	13	0	—	0.0× / 2.5

Cite: seahazards.com Sea Ledger, 2001-11, 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.