Sea Ledger, April 2000

2000-04-01 to 2000-04-30 · archive

issued: 426
warning-days in force: 5,417
in force at month end: 192
sea × type cells: 170

baseline: same month, previous 5 years (1999-04, 1998-04, 1997-04)

By type

type	issued	warning-days	in force at end
Cable ops	120	720.9	26
Incidents	54	602.7	20
Nav aids	52	1,294.3	47
Surveys	52	248.4	15
Exercises	51	365.2	15
Quakes	28	79	2
Other	16	483	17
Ordnance	16	308.1	10
Spills	9	126	4
Icebergs	8	56.4	3
Missiles	7	75.9	2
Containers	7	45.5	0
Derelicts	4	28.2	0
Wrecks	1	647.1	20
Debris	1	6.7	0
War risk	0	150	5
Structures	0	30	1
Restricted	0	30	1
Mines	0	60	2
Volcanic	0	60	2

By sea and type · 170 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Oceansurge	65	236.3	7	125	65× / 1
Cable ops · North Atlantic Oceansurge	23	126.9	3	65	8.6× / 2.67
Surveys · Celtic Seasurge	12	27.1	2	28	12× / 1
Surveys · North Seasurge	12	25.8	2	30	6.0× / 2
Exercises · North Atlantic Oceansurge	11	66.3	5	26	2.8× / 4
Quakes · South Pacific Ocean	11	33.3	0	—	1.4× / 8
Nav aids · North Seasurge	10	142	6	53	2.1× / 4.67
Cable ops · North Seasurge	8	24.4	0	—	8.0× / 1
Ordnance · North Atlantic Oceansurge	8	18.7	1	25	6.0× / 1.33
Incidents · South Pacific Oceannew	7	55.9	3	20	new / 0
Icebergs · South Atlantic Oceannew	7	50.1	3	33	new / 0
Nav aids · South Atlantic Ocean	6	163.2	6	121	1.8× / 3.33
Incidents · South Atlantic Oceansurge	6	73	2	49	4.5× / 1.33
Incidents · North Atlantic Oceansurge	6	59.7	2	65	4.5× / 1.33
Exercises · Black Seasurge	6	46.6	1	24	4.5× / 1.33
Containers · North Seanew	6	39.2	0	—	new / 0
Exercises · Mediterranean Sea - Eastern Basinnew	6	31.3	0	—	new / 0
Exercises · North Pacific Oceansurge	6	25.2	1	24	3.0× / 2
Incidents · North Pacific Ocean	5	84.9	3	64	1.5× / 3.33
Spills · North Atlantic Oceansurge	5	71	1	42	5.0× / 1
Missiles · North Pacific Oceansurge	5	60	2	34	2.5× / 2
Incidents · Philippine Seasurge	5	30.3	2	24	2.5× / 2
Cable ops · English Channelsurge	5	30.2	1	40	5.0× / 1
Surveys · Ionian Seasurge	5	22.2	2	76	15× / 0.33
Quakes · Philippine Seasurge	5	15	0	—	3.8× / 1.33
Surveys · Bristol Channelsurge	5	11.6	1	29	15× / 0.33
Surveys · Irish Sea and St. George's Channelsurge	5	9.7	2	7	15× / 0.33
Incidents · Coral Seanew	5	0.9	0	—	new / 0
Nav aids · Inner Seas off the West Coast of Scotlandsurge	4	116.2	5	346	3.0× / 1.33
Other · North Atlantic Oceansurgelong running	4	85.1	3	656	3.0× / 1.33
Other · North Seasurgelong running	4	68.6	2	367	6.0× / 0.67
Exercises · Mediterranean Sea - Western Basinsurge	4	31.9	0	—	6.0× / 0.67
Nav aids · Celtic Seasurge	4	24.3	1	28	6.0× / 0.67
Incidents · Indian Oceannew	4	14.7	1	26	new / 0
Exercises · Adriatic Seasurge	4	11.2	0	—	2.0× / 2
Surveys · English Channelsurge	4	10	1	11	6.0× / 0.67
Ordnance · Persian Gulfsurge	4	9.4	0	—	12× / 0.33
Nav aids · Gulf of Mexiconew	4	8.6	4	2	new / 0
Nav aids · Persian Gulfsurge	4	3.4	0	—	6.0× / 0.67
Nav aids · Coral Sea	3	71.1	3	318	1.3× / 2.33
Cable ops · Mediterranean Sea - Eastern Basinsurge	3	59.3	3	59	4.5× / 0.67
Cable ops · Eastern China Seasurge	3	25	1	17	9.1× / 0.33
Exercises · Tyrrhenian Seasurge	3	24.8	1	24	4.5× / 0.67
Exercises · Japan Seasurge	3	16.2	1	22	9.1× / 0.33
Cable ops · Celtic Sea	3	10.8	2	16	0.6× / 4.67
Surveys · Tyrrhenian Seasurge	3	8.7	1	19	9.1× / 0.33
Quakes · North Pacific Ocean	3	6.6	1	9	0.7× / 4.33
Nav aids · Irish Sea and St. George's Channelsurge	3	4.2	0	—	4.5× / 0.67
Ordnance · Adriatic Seanew	2	240	8	324	new / 0
Exercises · Aegean Sea	2	93.2	3	119	3.0× / 0.67
Nav aids · Tyrrhenian Sea	2	91	2	65	2.0× / 1
Incidents · Bay of Bengalnew	2	72.4	3	37	new / 0
Nav aids · Caribbean Seanew	2	41.1	1	299	new / 0
Surveys · Adriatic Seanewlong running	2	35.4	2	408	new / 0
Spills · Gulf of Mexico	2	28	1	41	0.8× / 2.67
Surveys · North Atlantic Oceannew	2	13.9	0	—	new / 0
Other · South Atlantic Ocean	2	9.2	1	12	6.1× / 0.33
Incidents · Great Australian Bightnew	2	7.3	0	—	new / 0
Exercises · Bay of Bengalnew	2	7.1	0	—	new / 0
Cable ops · Inner Seas off the West Coast of Scotland	2	4.8	0	—	2.0× / 1
Nav aids · Arafura Seanew	2	4.3	0	—	new / 0
Cable ops · Bay of Biscaynew	2	4	0	—	new / 0
Exercises · South Atlantic Oceannew	2	3.8	2	2	new / 0
Incidents · Ionian Seanew	2	2.7	0	—	new / 0
Incidents · Timor Seanew	2	0.2	0	—	new / 0
Nav aids · North Pacific Ocean	1	90	3	222	new / 0
Nav aids · North Atlantic Oceanlong running	1	74.1	2	370	0.3× / 3
Incidents · South China Sea	1	66	1	62	3.0× / 0.33
Other · Gulf of Mexico	1	60	2	61	new / 0
Wrecks · Kattegat	1	59.9	2	32	new / 0
Incidents · Arabian Sea	1	47.5	1	62	new / 0
Nav aids · Tasman Sea	1	34.5	1	257	1.5× / 0.67
Incidents · Malacca Strait	1	21	1	20	new / 0
Cable ops · Gulf of Guinea	1	19.9	1	132	new / 0
Surveys · Mediterranean Sea - Western Basin	1	18.8	0	—	3.0× / 0.33
Cable ops · South Pacific Ocean	1	18.6	1	18	new / 0
Cable ops · Arabian Sea	1	16.7	1	45	new / 0
Spills · Bering Sea	1	12	1	12	new / 0
Spills · Gulf of Alaska	1	11	1	11	new / 0
Cable ops · Gulf of Oman	1	10.6	1	10	new / 0
Nav aids · Ionian Sea	1	8.8	0	—	new / 0
Missiles · Bay of Bengal	1	8.7	0	—	new / 0
Derelicts · Mediterranean Sea - Eastern Basin	1	7.2	0	—	new / 0
Derelicts · North Pacific Ocean	1	7.2	0	—	3.0× / 0.33
Missiles · South Atlantic Ocean	1	7.2	0	—	3.0× / 0.33
Derelicts · South Pacific Ocean	1	7	0	—	new / 0
Incidents · Eastern China Sea	1	6.9	0	—	new / 0
Debris · Arafura Sea	1	6.7	0	—	new / 0
Cable ops · Indian Ocean	1	6.7	0	—	3.0× / 0.33
Derelicts · Caribbean Sea	1	6.6	0	—	new / 0
Containers · North Atlantic Ocean	1	6.3	0	—	3.0× / 0.33
Icebergs · South Pacific Ocean	1	6.3	0	—	1.5× / 0.67
Cable ops · Bass Strait	1	5.9	1	5	new / 0
Ordnance · Celtic Sea	1	5.8	0	—	new / 0
Other · Ionian Sea	1	5.6	0	—	3.0× / 0.33
Exercises · Ionian Sea	1	5.3	0	—	3.0× / 0.33
Other · Eastern China Sea	1	3.8	1	3	new / 0
Nav aids · Arabian Sea	1	3	0	—	new / 0
Quakes · Banda Sea	1	3	0	—	3.0× / 0.33
Quakes · Gulf of Tomini	1	3	0	—	3.0× / 0.33
Quakes · Indian Ocean	1	3	0	—	0.4× / 2.33
Quakes · Japan Sea	1	3	0	—	new / 0
Quakes · Makassar Strait	1	3	0	—	new / 0
Quakes · Mediterranean Sea - Eastern Basin	1	3	0	—	3.0× / 0.33
Quakes · Solomon Sea	1	3	0	—	0.5× / 2
Quakes · South Atlantic Ocean	1	3	0	—	0.8× / 1.33
Other · Tyrrhenian Sea	1	3	0	—	new / 0
Exercises · Norwegian Sea	1	2.3	1	2	new / 0
Ordnance · Norwegian Sea	1	1.5	0	—	new / 0
Incidents · Bismarck Sea	1	1.4	0	—	new / 0
Other · Inner Seas off the West Coast of Scotland	1	1.1	0	—	new / 0
Surveys · Aegean Sea	1	1	0	—	new / 0
Nav aids · Bass Strait	1	0.7	0	—	3.0× / 0.33
Nav aids · Hudson Strait	1	0.5	0	—	new / 0
Nav aids · English Channel	1	0.3	0	—	0.4× / 2.67
Other · Irish Sea and St. George's Channel	1	0.2	0	—	new / 0
Incidents · Mediterranean Sea - Eastern Basin	1	0.2	0	—	1.5× / 0.67
Incidents · Tasman Sea	1	0.2	0	—	new / 0
Quakes · Bismarck Sea	1	0.1	1	0	1.5× / 0.67
Incidents · Solomon Sea	1	0.1	0	—	new / 0
War risk · Persian Gulf	0	120	4	87	— / 0
Wrecks · South China Sea	0	120	4	201	— / 0
Wrecks · English Channel	0	90	3	305	— / 0
Nav aids · South Pacific Ocean	0	90	3	267	0.0× / 0.67
Other · Persian Gulf	0	66.4	2	185	— / 0
Nav aids · Malacca Strait	0	60	2	198	— / 0
Wrecks · North Atlantic Ocean	0	60	2	327	— / 0
Volcanic · North Pacific Oceanlong running	0	60	2	457	— / 0
Mines · North Sealong running	0	60	2	781	— / 0
Wrecks · North Sea	0	60	2	166	— / 0
Wrecks · Tyrrhenian Sealong running	0	60	2	556	— / 0
Nav aids · Andaman or Burma Sea	0	43.2	1	88	— / 0
Wrecks · Bay of Biscay	0	40.8	0	—	— / 0
Nav aids · Bay of Bengal	0	36.4	1	208	— / 0
Surveys · North Pacific Ocean	0	34.2	1	36	— / 0
Ordnance · Tyrrhenian Sea	0	32.7	1	178	— / 0
Nav aids · Adriatic Sealong running	0	30	1	404	— / 0
Other · Adriatic Sealong running	0	30	1	1,231	0.0× / 1
War risk · Adriatic Sealong running	0	30	1	381	0.0× / 0.33
Wrecks · Adriatic Sea	0	30	1	76	— / 0
Other · Gulf of California	0	30	1	34	— / 0
Nav aids · Gulf of Suezlong running	0	30	1	695	— / 0
Wrecks · Gulf of Thailand	0	30	1	202	— / 0
Other · Indian Ocean	0	30	1	60	0.0× / 0.33
Surveys · Indian Ocean	0	30	1	72	— / 0
Wrecks · Irish Sea and St. George's Channel	0	30	1	80	— / 0
Incidents · Japan Sea	0	30	1	38	— / 0
Nav aids · Laccadive Sea	0	30	1	31	— / 0
Cable ops · Malacca Strait	0	30	1	133	— / 0
Wrecks · Malacca Strait	0	30	1	130	— / 0
Restricted · North Atlantic Oceanlong running	0	30	1	775	— / 0
Cable ops · Persian Gulf	0	30	1	59	— / 0
Other · Red Sealong running	0	30	1	1,605	— / 0
Cable ops · Singapore Strait	0	30	1	83	— / 0
Nav aids · South China Sea	0	30	1	333	0.0× / 0.33
Other · South China Sea	0	30	1	250	— / 0
Structures · South China Sea	0	30	1	291	— / 0
Other · South Pacific Ocean	0	30	1	74	— / 0
Wrecks · South Pacific Ocean	0	30	1	169	— / 0
Nav aids · Southern Ocean	0	30	1	95	— / 0
Cable ops · Tasman Sea	0	30	1	151	— / 0
Nav aids · Timor Sea	0	30	1	96	— / 0
Incidents · Mozambique Channel	0	27.4	0	—	— / 0
Wrecks · Coral Sea	0	6.4	0	—	— / 0
Spills · Philippine Sea	0	4	0	—	— / 0
Nav aids · Mediterranean Sea - Eastern Basin	0	3.4	0	—	— / 0
Cable ops · North Pacific Ocean	0	0.6	0	—	— / 0
Derelicts · Coral Sea	0	0.2	0	—	— / 0
Cable ops · South China Sea	0	0.2	0	—	0.0× / 0.67
Cable ops · Mediterranean Sea - Western Basin	0	0	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2000-04, 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.