Sea Ledger, January 2001

2001-01-01 to 2001-01-31 · archive

issued: 492
warning-days in force: 6,330
in force at month end: 201
sea × type cells: 185

baseline: same month, previous 5 years (2000-01, 1999-01, 1998-01, 1997-01)

By type

type	issued	warning-days	in force at end
Cable ops	123	594.7	30
Surveys	72	263	7
Nav aids	57	2,189.7	75
Quakes	53	159.3	1
Incidents	52	843.8	24
Exercises	47	284.8	6
Ordnance	22	202.8	6
Other	15	582.1	15
Derelicts	10	45.2	1
Debris	10	37	1
Icebergs	8	54.3	1
Spills	7	72	3
Containers	6	33.1	0
Missiles	5	62	2
Wrecks	2	727.7	24
Towing	2	27.4	0
Volcanic	1	9	1
War risk	0	124	4
Structures	0	18.5	0

By sea and type · 185 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceansurge	70	206.6	8	34	3.5× / 20.25
Surveys · Celtic Seasurge	31	31.5	2	30	16× / 2
Cable ops · Celtic Seasurge	21	58.2	1	46	9.3× / 2.25
Quakes · North Pacific Oceansurge	15	45	0	—	2.4× / 6.25
Surveys · English Channelsurge	14	37.8	1	34	11× / 1.25
Surveys · Irish Sea and St. George's Channelsurge	14	30.5	0	—	19× / 0.75
Ordnance · North Atlantic Oceannew	12	71.3	1	33	new / 0
Exercises · North Pacific Oceansurge	9	34.4	1	19	3.3× / 2.75
Cable ops · English Channelsurge	9	14	3	34	12× / 0.75
Nav aids · North Seasurge	8	211.4	8	317	2.3× / 3.5
Exercises · North Atlantic Oceansurge	8	41.4	0	—	4.0× / 2
Quakes · Indian Oceansurge	7	21	0	—	3.1× / 2.25
Quakes · Philippine Seasurge	7	21	0	—	4.7× / 1.5
Quakes · South Pacific Ocean	7	20	1	24	0.6× / 12.5
Nav aids · Celtic Seasurge	6	71.7	2	62	3.0× / 2
Incidents · Indian Oceansurge	6	60.8	2	62	24× / 0.25
Incidents · Tasman Seasurge	6	55.7	2	48	6.0× / 1
Nav aids · South Atlantic Ocean	5	163.7	4	182	1.8× / 2.75
Nav aids · Coral Seasurgelong running	5	142.3	6	476	3.3× / 1.5
Exercises · Aegean Sealong running	5	101.1	3	395	1.1× / 4.75
Missiles · North Pacific Oceansurge	5	62	2	35	2.0× / 2.5
Icebergs · South Atlantic Oceansurge	5	34.8	1	35	4.0× / 1.25
Incidents · Adriatic Seanew	5	25.7	1	26	new / 0
Exercises · Bay of Bengalnew	5	23.3	0	—	new / 0
Exercises · Mediterranean Sea - Western Basinsurge	5	15.2	0	—	2.9× / 1.75
Surveys · Bristol Channelnew	5	14.7	0	—	new / 0
Incidents · North Pacific Ocean	4	126.3	3	67	0.9× / 4.5
Nav aids · North Atlantic Ocean	4	126.2	5	225	1.4× / 2.75
Incidents · South Atlantic Ocean	4	68.4	2	67	0.9× / 4.25
Nav aids · Persian Gulfsurge	4	66.2	3	54	8.0× / 0.5
Surveys · South Atlantic Oceansurge	4	27.5	0	—	16× / 0.25
Containers · North Atlantic Oceansurge	4	20.4	0	—	4.0× / 1
Exercises · Adriatic Sea	4	11.7	0	—	1.2× / 3.25
Cable ops · Irish Sea and St. George's Channelsurge	4	5.3	0	—	2.3× / 1.75
Nav aids · South Pacific Oceansurgelong running	3	336.6	10	543	4.0× / 0.75
Incidents · North Atlantic Ocean	3	171.5	4	68	0.8× / 4
Incidents · South Pacific Oceansurge	3	63.8	2	35	2.4× / 1.25
Spills · Gulf of Mexico	3	43	0	—	0.8× / 3.75
Ordnance · North Pacific Oceansurge	3	40.3	1	111	6.0× / 0.5
Nav aids · Tyrrhenian Sea	3	40	1	191	1.7× / 1.75
Other · North Pacific Oceansurge	3	29.8	0	—	6.0× / 0.5
Incidents · Coral Seasurge	3	27.2	1	62	3.0× / 1
Spills · North Pacific Oceansurge	3	23	2	15	2.4× / 1.25
Quakes · Coral Sea	3	10.3	0	—	1.7× / 1.75
Other · English Channelnew	3	9.3	0	—	new / 0
Quakes · Arabian Seanew	3	9	0	—	new / 0
Quakes · South Atlantic Ocean	3	9	0	—	1.7× / 1.75
Ordnance · Persian Gulfnew	3	7.4	1	28	new / 0
Cable ops · North Sea	3	6	2	13	1.1× / 2.75
Exercises · Ligurian Seasurge	3	4.2	1	5	6.0× / 0.5
Cable ops · North Atlantic Ocean	3	3.7	2	19	0.7× / 4.25
Debris · Ligurian Seanew	3	3	0	—	new / 0
Incidents · Celtic Seasurge	3	0.5	0	—	12× / 0.25
Nav aids · English Channel	2	84.8	1	107	0.5× / 3.75
Incidents · South China Sea	2	72.5	1	69	0.9× / 2.25
Other · Japan Seanew	2	66.5	2	35	new / 0
Cable ops · South China Sea	2	64	3	179	4.0× / 0.5
Nav aids · Andaman or Burma Seanew	2	58.7	3	112	new / 0
Cable ops · Tasman Sea	2	43.4	2	41	4.0× / 0.5
Nav aids · Solomon Seanew	2	28.8	2	20	new / 0
Cable ops · South Pacific Ocean	2	26.2	2	34	4.0× / 0.5
Nav aids · Laccadive Seanew	2	13.7	1	9	new / 0
Icebergs · Indian Ocean	2	13.1	0	—	8.0× / 0.25
Containers · Bay of Biscaynew	2	12.7	0	—	new / 0
Derelicts · Arafura Seanew	2	12.5	0	—	new / 0
Exercises · South Pacific Ocean	2	11.7	0	—	4.0× / 0.5
Cable ops · North Pacific Ocean	2	11.2	1	11	8.0× / 0.25
Towing · Adriatic Seanew	2	10.7	0	—	new / 0
Debris · Mediterranean Sea - Eastern Basinnew	2	9.8	0	—	new / 0
Debris · North Atlantic Ocean	2	8.7	1	9	2.7× / 0.75
Derelicts · South China Sea	2	7.6	0	—	2.7× / 0.75
Exercises · Ionian Seanew	2	7.3	0	—	new / 0
Ordnance · Japan Sea	2	6.5	1	6	8.0× / 0.25
Quakes · Gulf of Alaska	2	6	0	—	8.0× / 0.25
Quakes · Molukka Sea	2	6	0	—	4.0× / 0.5
Derelicts · North Pacific Oceannew	2	3.7	1	10	new / 0
Exercises · Tyrrhenian Sea	2	3.2	0	—	1.1× / 1.75
Nav aids · Bass Strait	2	1.1	0	—	2.0× / 1
Incidents · North Seanew	2	0.6	0	—	new / 0
Incidents · Southern Oceannew	2	0.5	0	—	new / 0
Nav aids · Tasman Sea	1	112.4	3	273	4.0× / 0.25
Other · North Atlantic Ocean	1	79.1	2	62	4.0× / 0.25
Nav aids · Irish Sea and St. George's Channel	1	65.2	2	273	0.4× / 2.25
Wrecks · Persian Gulf	1	64.5	3	219	new / 0
Incidents · Arabian Sea	1	53.9	1	52	4.0× / 0.25
Nav aids · Bay of Bengallong running	1	53.5	2	484	new / 0
Other · North Sealong running	1	51.9	2	643	2.0× / 0.5
Other · Tyrrhenian Sea	1	37.1	1	100	new / 0
Other · Yellow Sea	1	36	1	34	new / 0
Incidents · Ionian Sea	1	35.7	1	69	new / 0
Incidents · Great Australian Bight	1	34.2	1	41	2.0× / 0.5
Wrecks · Adriatic Sea	1	32.7	1	352	new / 0
Nav aids · Japan Sea	1	31.5	1	75	4.0× / 0.25
Cable ops · Gulf of Suez	1	31	1	91	new / 0
Surveys · Mediterranean Sea - Eastern Basin	1	28	1	52	1.3× / 0.75
Exercises · Black Sea	1	25.9	1	25	new / 0
Surveys · Mediterranean Sea - Western Basin	1	23.2	1	23	0.4× / 2.5
Nav aids · Sulu Sea	1	20	1	19	new / 0
Cable ops · Arabian Sea	1	19.9	1	70	2.0× / 0.5
Incidents · Bay of Bengal	1	18.6	1	18	4.0× / 0.25
Other · Aegean Sea	1	15.6	1	15	new / 0
Incidents · Gulf of Guinea	1	12.5	1	12	new / 0
Nav aids · Sea of Okhotsk	1	9.8	0	—	4.0× / 0.25
Volcanic · South Pacific Ocean	1	9	1	8	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	7.2	1	7	0.8× / 1.25
Derelicts · North Atlantic Ocean	1	6.9	0	—	1.3× / 0.75
Derelicts · Bay of Bengal	1	6.7	0	—	new / 0
Derelicts · Celtic Sea	1	6.4	0	—	4.0× / 0.25
Debris · South Pacific Ocean	1	6.4	0	—	new / 0
Icebergs · Southern Ocean	1	6.4	0	—	1.0× / 1
Debris · Celtic Sea	1	6.1	0	—	new / 0
Ordnance · Gulf of Mexico	1	5.7	1	5	4.0× / 0.25
Ordnance · English Channel	1	4.7	0	—	new / 0
Incidents · Gulf of Aden	1	4.6	1	4	new / 0
Nav aids · Mediterranean Sea - Eastern Basin	1	4.4	1	4	2.0× / 0.5
Exercises · Arabian Sea	1	3.6	0	—	new / 0
Cable ops · Black Sea	1	3.3	0	—	new / 0
Quakes · Caribbean Sea	1	3	0	—	new / 0
Other · Laccadive Sea	1	3	0	—	new / 0
Debris · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Quakes · North Atlantic Ocean	1	3	0	—	4.0× / 0.25
Quakes · Solomon Sea	1	3	0	—	0.7× / 1.5
Quakes · South China Sea	1	3	0	—	2.0× / 0.5
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	3	1	3	2.0× / 0.5
Surveys · Tyrrhenian Sea	1	2.8	0	—	1.3× / 0.75
Nav aids · Arabian Sea	1	1.5	1	1	new / 0
Cable ops · Bristol Channel	1	1	1	1	new / 0
Other · Philippine Sea	1	0.8	0	—	4.0× / 0.25
Cable ops · Inner Seas off the West Coast of Scotland	1	0.5	0	—	2.0× / 0.5
Surveys · Inner Seas off the West Coast of Scotland	1	0.5	0	—	new / 0
Derelicts · Adriatic Sea	1	0.4	0	—	new / 0
Incidents · Arafura Sea	1	0.1	0	—	new / 0
Incidents · English Channel	1	0.1	0	—	new / 0
Incidents · Philippine Sea	1	0.1	0	—	0.8× / 1.25
War risk · Persian Gulf	0	124	4	363	— / 0
Nav aids · Mozambique Channel	0	93	3	174	0.0× / 0.25
Nav aids · North Pacific Ocean	0	93	3	323	0.0× / 0.25
Wrecks · South China Sealong running	0	93	3	379	0.0× / 0.25
Wrecks · North Sea	0	72.5	2	332	— / 0
Other · Adriatic Sealong running	0	62	2	1,507	— / 0
Wrecks · English Channellong running	0	62	2	581	— / 0
Nav aids · Malacca Straitlong running	0	62	2	474	— / 0
Cable ops · Persian Gulf	0	62	2	157	— / 0
Wrecks · Red Sea	0	62	2	267	— / 0
Wrecks · South Pacific Ocean	0	62	2	271	— / 0
Wrecks · Tyrrhenian Sealong running	0	62	2	832	— / 0
Other · Persian Gulf	0	49.5	1	86	0.0× / 0.25
Nav aids · Gulf of Suez	0	38.5	1	218	— / 0
Ordnance · Adriatic Sea	0	31.5	0	—	0.0× / 0.75
Other · South China Sealong running	0	31.5	1	526	0.0× / 0.75
Nav aids · Adriatic Sealong running	0	31	1	680	— / 0
Wrecks · Arabian Sea	0	31	1	125	— / 0
Wrecks · Baltic Sea	0	31	1	33	— / 0
Wrecks · Bay of Biscay	0	31	1	74	— / 0
Cable ops · Caribbean Sea	0	31	1	78	0.0× / 1.25
Nav aids · Caribbean Sea	0	31	1	271	0.0× / 0.5
Wrecks · Coral Sea	0	31	1	247	— / 0
Nav aids · Eastern China Sea	0	31	1	100	— / 0
Other · Greenland Sea	0	31	1	161	— / 0
Nav aids · Gulf of Mexico	0	31	1	252	— / 0
Nav aids · Indian Ocean	0	31	1	72	0.0× / 0.75
Nav aids · Inner Seas off the West Coast of Scotland	0	31	1	281	0.0× / 2.25
Wrecks · Irish Sea and St. George's Channel	0	31	1	212	0.0× / 0.25
Wrecks · North Atlantic Oceanlong running	0	31	1	603	0.0× / 0.25
Surveys · North Pacific Ocean	0	31	1	312	0.0× / 0.25
Nav aids · Red Sea	0	31	1	79	— / 0
Other · Red Sealong running	0	31	1	1,881	— / 0
Wrecks · Skagerrak	0	31	1	84	— / 0
Surveys · Sulu Sea	0	31	1	45	— / 0
Nav aids · Timor Sealong running	0	31	1	372	0.0× / 0.25
Ordnance · Tyrrhenian Sealong running	0	31	1	454	0.0× / 0.75
Other · South Pacific Ocean	0	25.5	0	—	0.0× / 0.75
Structures · South China Sea	0	18.5	0	—	— / 0
Towing · Ionian Sea	0	16.7	0	—	— / 0
Other · Labrador Sea	0	12	0	—	— / 0
Incidents · Bay of Biscay	0	10.5	0	—	— / 0
Cable ops · Mediterranean Sea - Eastern Basin	0	7.4	0	—	0.0× / 1
Other · Tasman Sea	0	6	0	—	— / 0
Surveys · Adriatic Sea	0	4.5	0	—	— / 0
Nav aids · Gulf of Riga	0	4.5	0	—	— / 0
Other · Indian Ocean	0	4.5	0	—	— / 0
Ordnance · Indian Ocean	0	4.4	0	—	— / 0
Spills · North Atlantic Ocean	0	3	0	—	0.0× / 2.75
Exercises · Balearic (Iberian Sea)	0	1.8	0	—	— / 0
Derelicts · Caribbean Sea	0	1	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2001-01, 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.