Sea Ledger, December 2001

2001-12-01 to 2001-12-31 · archive

issued: 310
warning-days in force: 6,923
in force at month end: 217
sea × type cells: 191

baseline: same month, previous 5 years (2000-12, 1999-12, 1998-12, 1997-12)

By type

type	issued	warning-days	in force at end
Incidents	64	1,207.1	38
Cable ops	49	752.2	24
Exercises	43	282.9	6
Nav aids	38	2,403.1	78
Surveys	30	232.8	4
Quakes	29	90.7	3
Other	21	513.4	17
Derelicts	15	64.7	3
Missiles	5	62	2
Ordnance	5	88.9	2
Icebergs	3	30.9	1
Spills	3	61	2
Wrecks	2	894.6	30
Debris	1	33.6	1
Containers	1	10.9	0
Restricted	1	7.9	0
War risk	0	62	2
Structures	0	62	2
Volcanic	0	62	2

By sea and type · 191 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	28	91.6	3	33	1.3× / 21.25
Surveys · Celtic Seasurge	19	54.9	2	29	5.8× / 3.25
Incidents · South Pacific Oceansurge	11	120.1	4	37	7.3× / 1.5
Incidents · North Atlantic Oceansurge	10	136	7	52	2.4× / 4.25
Incidents · North Pacific Ocean	9	215.8	7	64	1.9× / 4.75
Incidents · Philippine Seasurge	7	145.5	3	73	28× / 0.25
Exercises · Bay of Bengalsurge	7	31.8	1	28	14× / 0.5
Surveys · South Atlantic Oceansurge	7	29.4	1	49	4.7× / 1.5
Quakes · South Pacific Ocean	7	24.7	2	32	0.8× / 8.5
Exercises · North Pacific Ocean	7	18.7	0	—	1.6× / 4.5
Exercises · North Atlantic Ocean	7	13	0	—	1.9× / 3.75
Nav aids · South Atlantic Oceanlong running	6	360.2	12	516	1.9× / 3.25
Nav aids · North Sealong running	6	205.5	5	466	1.2× / 5
Nav aids · English Channellong running	6	144.3	4	441	1.1× / 5.25
Missiles · North Pacific Ocean	5	62	2	35	1.4× / 3.5
Cable ops · Celtic Seasurge	5	35	1	42	2.0× / 2.5
Incidents · Indian Oceansurge	4	157.1	5	69	3.2× / 1.25
Exercises · Aegean Seasurge	4	82.9	4	363	4.0× / 1
Incidents · South Atlantic Oceansurge	4	47.6	1	54	2.0× / 2
Cable ops · North Sea	4	18.4	1	24	1.6× / 2.5
Derelicts · Mediterranean Sea - Eastern Basinsurge	4	14.8	0	—	16× / 0.25
Quakes · Coral Sea	4	12	0	—	1.1× / 3.5
Quakes · Indian Oceansurge	4	11.4	1	30	2.0× / 2
Nav aids · Tasman Seasurge	4	7.5	1	26	4.0× / 1
Nav aids · Coral Seasurgelong running	3	125.6	4	620	3.0× / 1
Nav aids · Tyrrhenian Sea	3	88.5	4	251	1.5× / 2
Other · North Seanewlong running	3	76.2	4	637	new / 0
Other · South Atlantic Oceansurge	3	44.2	1	300	3.0× / 1
Exercises · Arabian Seanew	3	17.3	0	—	new / 0
Cable ops · North Atlantic Ocean	3	14	1	123	0.8× / 4
Exercises · South Atlantic Ocean	3	12.6	0	—	1.7× / 1.75
Exercises · South Pacific Oceansurge	3	7.2	0	—	4.0× / 0.75
Incidents · Tasman Seasurge	3	3.3	0	—	4.0× / 0.75
Cable ops · South China Sea	2	109.9	3	77	4.0× / 0.5
Nav aids · Celtic Sea	2	82.9	4	265	0.4× / 4.5
Incidents · South China Sea	2	70	2	54	0.7× / 2.75
Other · Japan Sea	2	64.3	2	35	4.0× / 0.5
Incidents · Mediterranean Sea - Eastern Basin	2	57.8	2	29	8.0× / 0.25
Spills · Gulf of Mexico	2	38	2	43	0.9× / 2.25
Other · Yellow Sea	2	36	1	32	8.0× / 0.25
Other · North Atlantic Ocean	2	26.5	0	—	1.3× / 1.5
Incidents · Bay of Biscay	2	25.3	0	—	4.0× / 0.5
Incidents · Solomon Seanew	2	23.2	1	23	new / 0
Other · Tasman Sea	2	22	2	20	4.0× / 0.5
Surveys · Ligurian Sea	2	21.5	0	—	2.7× / 0.75
Incidents · Coral Sea	2	18.2	1	35	0.8× / 2.5
Icebergs · Southern Ocean	2	13.8	0	—	8.0× / 0.25
Exercises · Mediterranean Sea - Eastern Basin	2	7.8	0	—	4.0× / 0.5
Derelicts · North Pacific Ocean	2	6.5	1	12	8.0× / 0.25
Other · Indian Oceannew	2	6.2	0	—	new / 0
Quakes · Philippine Sea	2	6	0	—	1.3× / 1.5
Quakes · South Atlantic Ocean	2	6	0	—	1.1× / 1.75
Cable ops · Bass Straitnew	2	5.4	0	—	new / 0
Other · Inner Seas off the West Coast of Scotland	2	2	0	—	4.0× / 0.5
Incidents · Aegean Sea	2	0.8	0	—	8.0× / 0.25
Nav aids · South Pacific Oceanlong running	1	158	5	446	2.0× / 0.5
Nav aids · Singapore Strait	1	97.4	4	293	new / 0
Nav aids · Adriatic Sea	1	95.8	3	213	4.0× / 0.25
Cable ops · Persian Gulf	1	66.6	3	71	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	55.4	2	44	new / 0
Wrecks · Baltic Sealong running	1	50.3	2	367	1.3× / 0.75
Cable ops · Eastern China Sea	1	42.7	2	58	4.0× / 0.25
Wrecks · Persian Gulf	1	38.3	2	193	4.0× / 0.25
Exercises · Malacca Strait	1	35.3	1	35	new / 0
Nav aids · Great Australian Bight	1	34.3	1	256	1.0× / 1
Incidents · Bay of Bengal	1	31.8	2	38	new / 0
Nav aids · Inner Seas off the West Coast of Scotlandlong running	1	31.2	1	615	0.6× / 1.75
Cable ops · Adriatic Sea	1	31	1	32	new / 0
Debris · South Pacific Ocean	1	31	1	47	new / 0
Exercises · Philippine Sea	1	30	0	—	new / 0
Nav aids · Gulf of Mexico	1	28.3	1	28	new / 0
Nav aids · Persian Gulf	1	27.5	1	27	2.0× / 0.5
Incidents · Adriatic Sea	1	23.2	1	23	new / 0
Spills · North Pacific Ocean	1	23	0	—	2.0× / 0.5
Cable ops · Tasman Sea	1	14	1	13	2.0× / 0.5
Derelicts · Indian Ocean	1	12.4	1	12	new / 0
Other · Mediterranean Sea - Eastern Basin	1	12.4	1	12	new / 0
Surveys · Mediterranean Sea - Eastern Basin	1	11.9	0	—	2.0× / 0.5
Exercises · Tyrrhenian Sea	1	10	0	—	1.0× / 1
Exercises · Black Sea	1	8.1	0	—	4.0× / 0.25
Restricted · North Atlantic Ocean	1	7.9	0	—	new / 0
Surveys · Mediterranean Sea - Western Basin	1	7	0	—	1.3× / 0.75
Ordnance · Norwegian Sea	1	7	0	—	new / 0
Derelicts · Timor Sea	1	7	0	—	new / 0
Containers · Irish Sea and St. George's Channel	1	6.9	0	—	2.0× / 0.5
Derelicts · Adriatic Sea	1	6.2	0	—	new / 0
Derelicts · Persian Gulf	1	6.1	0	—	new / 0
Ordnance · Greenland Sea	1	6	0	—	4.0× / 0.25
Cable ops · Aegean Sea	1	5.6	0	—	4.0× / 0.25
Ordnance · Gulf of Mexico	1	5.5	0	—	new / 0
Icebergs · South Pacific Ocean	1	5.1	1	5	new / 0
Ordnance · South China Sea	1	4.7	0	—	new / 0
Derelicts · Sea of Okhotsk	1	4.4	1	4	new / 0
Exercises · Adriatic Sea	1	4	0	—	0.6× / 1.75
Ordnance · Laccadive Sea	1	3.7	0	—	new / 0
Quakes · North Pacific Ocean	1	3.6	0	—	0.1× / 9
Quakes · Banda Sea	1	3	0	—	2.0× / 0.5
Quakes · Bismarck Sea	1	3	0	—	0.3× / 3
Quakes · Eastern China Sea	1	3	0	—	new / 0
Quakes · Gulf of California	1	3	0	—	new / 0
Quakes · Gulf of Tomini	1	3	0	—	4.0× / 0.25
Quakes · North Atlantic Ocean	1	3	0	—	0.4× / 2.25
Quakes · Solomon Sea	1	3	0	—	0.4× / 2.25
Quakes · South China Sea	1	3	0	—	1.3× / 0.75
Quakes · Tasman Sea	1	3	0	—	new / 0
Exercises · Laccadive Sea	1	2.2	0	—	new / 0
Other · Ionian Sea	1	2.1	0	—	4.0× / 0.25
Derelicts · South China Sea	1	2.1	0	—	1.0× / 1
Exercises · Indian Ocean	1	2	0	—	4.0× / 0.25
Derelicts · South Atlantic Ocean	1	1	0	—	4.0× / 0.25
Derelicts · North Sea	1	0.6	0	—	4.0× / 0.25
Derelicts · South Pacific Ocean	1	0.6	0	—	new / 0
Incidents · Arafura Sea	1	0.4	0	—	new / 0
Other · North Pacific Ocean	1	0.2	0	—	new / 0
Incidents · Gulf of Guinea	1	0	0	—	new / 0
Wrecks · English Channellong running	0	155	5	915	0.0× / 0.75
Nav aids · Mozambique Channel	0	124	4	228	0.0× / 0.5
Wrecks · North Sealong running	0	124	4	666	0.0× / 0.25
Wrecks · South China Sealong running	0	124	4	643	0.0× / 0.25
Incidents · Japan Sea	0	86.5	2	57	— / 0
Nav aids · North Atlantic Oceanlong running	0	69	2	492	0.0× / 1.75
Wrecks · Coral Sea	0	62	2	329	— / 0
Cable ops · Gulf of Mexico	0	62	2	177	— / 0
Nav aids · Gulf of Suez	0	62	2	123	— / 0
Nav aids · Irish Sea and St. George's Channellong running	0	62	2	607	0.0× / 0.75
Nav aids · North Pacific Ocean	0	62	2	304	0.0× / 0.5
War risk · Persian Gulf	0	62	2	333	— / 0
Volcanic · Philippine Sea	0	62	2	101	— / 0
Nav aids · South China Sea	0	62	2	200	0.0× / 0.25
Wrecks · Tyrrhenian Sea	0	62	2	326	— / 0
Cable ops · Java Sea	0	46	1	64	— / 0
Cable ops · Bay of Bengal	0	41	1	84	— / 0
Other · Adriatic Sealong running	0	31	1	606	— / 0
Surveys · Adriatic Sea	0	31	1	113	0.0× / 0.5
Nav aids · Andaman or Burma Sea	0	31	1	335	0.0× / 0.75
Cable ops · Arabian Sea	0	31	1	63	0.0× / 0.5
Nav aids · Arabian Sea	0	31	1	172	— / 0
Wrecks · Bay of Biscaylong running	0	31	1	408	0.0× / 0.5
Nav aids · Bering Sea	0	31	1	151	— / 0
Other · Bering Sea	0	31	1	150	— / 0
Nav aids · Bismarck Sea	0	31	1	242	— / 0
Other · Black Sea	0	31	1	77	— / 0
Cable ops · Caribbean Sea	0	31	1	61	0.0× / 0.75
Nav aids · Caribbean Sea	0	31	1	214	— / 0
Wrecks · Celtic Sea	0	31	1	45	— / 0
Nav aids · Eastern China Sealong running	0	31	1	434	— / 0
Other · Greenland Sealong running	0	31	1	495	— / 0
Cable ops · Indian Ocean	0	31	1	37	0.0× / 0.25
Wrecks · Irish Sea and St. George's Channellong running	0	31	1	546	— / 0
Wrecks · Kattegat	0	31	1	315	— / 0
Nav aids · Laccadive Sea	0	31	1	249	0.0× / 0.25
Wrecks · Malacca Strait	0	31	1	188	0.0× / 0.5
Ordnance · Mediterranean Sea - Eastern Basin	0	31	1	68	— / 0
Structures · Mediterranean Sea - Eastern Basin	0	31	1	82	— / 0
Ordnance · North Pacific Ocean	0	31	1	81	0.0× / 0.75
Wrecks · North Pacific Ocean	0	31	1	81	— / 0
Other · Persian Gulf	0	31	1	96	0.0× / 0.25
Nav aids · Philippine Sea	0	31	1	200	— / 0
Wrecks · Red Sea	0	31	1	240	— / 0
Other · Rio de La Plata	0	31	1	102	— / 0
Wrecks · Sea of Okhotsk	0	31	1	91	— / 0
Cable ops · Singapore Strait	0	31	1	41	— / 0
Nav aids · Skagerrak	0	31	1	181	— / 0
Wrecks · Skagerraklong running	0	31	1	418	— / 0
Nav aids · Solomon Sea	0	31	1	274	— / 0
Structures · South China Sea	0	31	1	51	— / 0
Nav aids · Sulu Sea	0	31	1	353	— / 0
Nav aids · Timor Sealong running	0	31	1	706	— / 0
Cable ops · Black Sea	0	30	0	—	— / 0
Incidents · Java Sea	0	24.5	0	—	— / 0
Surveys · Persian Gulf	0	23.5	0	—	— / 0
Other · English Channel	0	21.7	0	—	0.0× / 0.25
Nav aids · Rio de La Plata	0	20.7	0	—	— / 0
Surveys · Gulf of Suez	0	20	0	—	— / 0
Cable ops · Mediterranean Sea - Eastern Basin	0	15	0	—	— / 0
Surveys · Singapore Strait	0	15	0	—	— / 0
Nav aids · Ionian Sea	0	13.5	0	—	— / 0
Nav aids · Malacca Strait	0	13.5	0	—	0.0× / 0.5
Incidents · Mozambique Channel	0	13.5	0	—	0.0× / 0.25
Icebergs · North Atlantic Ocean	0	12	0	—	0.0× / 0.5
Other · Tyrrhenian Sea	0	7.1	0	—	0.0× / 0.5
Surveys · Bay of Bengal	0	6.5	0	—	— / 0
Incidents · Malacca Strait	0	6.5	0	—	— / 0
Other · South China Sea	0	6.5	0	—	0.0× / 0.5
Surveys · Tyrrhenian Sea	0	6.2	0	—	0.0× / 0.25
Surveys · Inner Seas off the West Coast of Scotland	0	5.9	0	—	0.0× / 0.5
Containers · Tyrrhenian Sea	0	4	0	—	0.0× / 0.5
Debris · English Channel	0	2.6	0	—	— / 0
Derelicts · Philippine Sea	0	2	0	—	0.0× / 0.25
Derelicts · North Atlantic Ocean	0	1	0	—	0.0× / 2.75
Other · Gulf of Mexico	0	0	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2001-12, 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.