Sea Ledger, April 2002

2002-04-01 to 2002-04-30 · archive

issued: 348
warning-days in force: 5,918
in force at month end: 203
sea × type cells: 184

baseline: same month, previous 5 years (2001-04, 2000-04, 1999-04, 1998-04, 1997-04)

By type

type	issued	warning-days	in force at end
Cable ops	75	494.3	17
Exercises	74	523.3	18
Incidents	56	1,385.2	48
Nav aids	33	1,582.5	52
Quakes	28	86.1	2
Surveys	26	216.4	9
Other	18	424.9	13
Derelicts	14	65.7	5
Icebergs	7	42.5	2
Containers	5	15.3	2
Missiles	4	60	2
Ordnance	4	126.5	3
Debris	2	10.1	1
Towing	1	15.5	0
Spills	1	7	1
Wrecks	0	709.2	23
War risk	0	60	2
Structures	0	33.6	1
Volcanic	0	60	2

By sea and type · 184 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	36	111.5	5	33	1.6× / 22
Exercises · North Atlantic Oceansurge	12	99.7	3	40	2.1× / 5.8
Exercises · Arabian Seasurge	11	39.5	5	29	28× / 0.4
Cable ops · North Atlantic Ocean	11	37.7	1	49	1.4× / 8
Incidents · South Pacific Oceansurge	10	147.1	7	44	3.9× / 2.6
Quakes · South Pacific Ocean	10	27.7	1	29	1.2× / 8.2
Incidents · North Pacific Oceansurge	9	293.3	12	67	2.1× / 4.2
Exercises · Bay of Bengalsurge	9	41.8	0	—	9.0× / 1
Surveys · North Atlantic Oceansurge	9	10.5	0	—	9.0× / 1
Exercises · North Pacific Oceansurge	8	22.3	2	36	2.4× / 3.4
Incidents · Philippine Seasurge	7	239	8	60	2.5× / 2.8
Exercises · South Pacific Oceannew	7	25.4	0	—	new / 0
Quakes · North Pacific Ocean	7	23.1	1	30	1.4× / 5
Incidents · North Atlantic Oceansurge	6	107.5	3	48	2.0× / 3
Cable ops · English Channelsurge	6	12.8	1	24	3.0× / 2
Nav aids · North Sealong running	5	138.9	4	586	1.0× / 5.2
Exercises · Black Seasurge	5	42.9	0	—	2.1× / 2.4
Quakes · Coral Sea	5	15	0	—	1.3× / 3.8
Nav aids · Inner Seas off the West Coast of Scotlandsurgelong running	4	67.2	2	735	2.2× / 1.8
Missiles · North Pacific Ocean	4	60	2	34	1.3× / 3.2
Icebergs · Southern Oceansurge	4	30.6	2	31	10× / 0.4
Nav aids · South Atlantic Oceanlong running	3	153.7	4	467	0.8× / 3.8
Nav aids · Coral Sealong running	3	122.9	4	740	1.1× / 2.6
Incidents · South Atlantic Ocean	3	73.1	1	66	0.9× / 3.2
Nav aids · Persian Gulfsurge	3	65.7	2	147	2.1× / 1.4
Incidents · Indian Ocean	3	64.8	2	69	1.1× / 2.6
Nav aids · North Atlantic Oceanlong running	3	36.9	1	612	1.1× / 2.8
Cable ops · Arabian Seasurge	3	35.2	1	48	7.5× / 0.4
Other · Persian Gulfsurge	3	34.5	1	216	15× / 0.2
Surveys · Gulf of Mexiconew	3	22.1	0	—	new / 0
Cable ops · Irish Sea and St. George's Channel	3	19.2	0	—	1.1× / 2.6
Exercises · Mediterranean Sea - Western Basin	3	15.2	2	13	1.7× / 1.8
Containers · North Atlantic Oceansurge	3	13.7	1	26	7.5× / 0.4
Exercises · Laccadive Seasurge	3	13.4	0	—	2.5× / 1.2
Cable ops · Celtic Sea	3	9.5	1	7	0.7× / 4.6
Surveys · Strait of Gibraltarnew	3	3.4	0	—	new / 0
Other · North Atlantic Ocean	3	3	0	—	1.1× / 2.6
Incidents · South China Sea	2	91.8	3	71	2.0× / 1
Incidents · Mediterranean Sea - Eastern Basin	2	82.7	3	53	2.5× / 0.8
Nav aids · South Pacific Oceanlong running	2	79.8	2	566	1.7× / 1.2
Exercises · Aegean Sea	2	73.2	2	117	1.3× / 1.6
Other · Japan Sea	2	64.9	2	34	5.0× / 0.4
Nav aids · Mozambique Channelnew	2	64.3	3	298	new / 0
Cable ops · South China Sea	2	60	2	37	2.0× / 1
Other · Bass Straitnew	2	54	2	30	new / 0
Exercises · Tyrrhenian Sea	2	51.4	1	32	1.4× / 1.4
Exercises · South Atlantic Ocean	2	39.4	0	—	3.3× / 0.6
Cable ops · North Sea	2	37.3	0	—	0.6× / 3.4
Nav aids · Mediterranean Sea - Eastern Basinnew	2	29.3	2	27	new / 0
Ordnance · Greenland Seanew	2	12.4	0	—	new / 0
Derelicts · North Atlantic Ocean	2	10.4	1	18	5.0× / 0.4
Derelicts · North Pacific Ocean	2	9.1	1	28	2.5× / 0.8
Derelicts · South Atlantic Oceannew	2	9	1	23	new / 0
Cable ops · Tasman Sea	2	8.7	0	—	10× / 0.2
Cable ops · Eastern China Sea	2	7.9	0	—	2.5× / 0.8
Incidents · Tasman Sea	2	7	0	—	5.0× / 0.4
Exercises · Ionian Sea	2	6.9	0	—	5.0× / 0.4
Incidents · Celtic Sea	2	6.4	0	—	3.3× / 0.6
Quakes · Southern Ocean	2	6	0	—	5.0× / 0.4
Other · North Pacific Ocean	2	4.9	0	—	3.3× / 0.6
Exercises · Mediterranean Sea - Eastern Basin	2	4.2	1	7	1.1× / 1.8
Derelicts · Mediterranean Sea - Eastern Basin	2	3.3	2	2	3.3× / 0.6
Icebergs · North Atlantic Ocean	2	2	0	—	5.0× / 0.4
Exercises · Bering Seanew	2	1.9	0	—	new / 0
Containers · English Channelnew	2	1.6	1	1	new / 0
Incidents · Coral Sea	2	0.8	0	—	1.0× / 2
Incidents · Timor Sea	2	0.3	0	—	5.0× / 0.4
Surveys · Indian Ocean	1	62.9	2	98	new / 0
Nav aids · Tasman Sea	1	56.4	2	43	1.0× / 1
Incidents · Japan Sea	1	51.4	2	43	new / 0
Nav aids · English Channellong running	1	44	1	561	0.4× / 2.8
Incidents · Persian Gulf	1	38.3	2	43	new / 0
Cable ops · Mediterranean Sea - Eastern Basin	1	33.8	1	34	1.0× / 1
Other · Rio de La Plata	1	33.5	1	41	new / 0
Exercises · Malacca Strait	1	33.3	1	33	new / 0
Other · Yellow Sea	1	31.9	1	32	5.0× / 0.2
Cable ops · Persian Gulf	1	30.5	2	38	new / 0
Nav aids · Celtic Sealong running	1	30.4	1	385	0.6× / 1.6
Surveys · Mediterranean Sea - Eastern Basin	1	24.9	0	—	1.7× / 0.6
Nav aids · Mediterranean Sea - Western Basin	1	19.5	1	19	1.7× / 0.6
Surveys · Tyrrhenian Sea	1	16.2	0	—	1.3× / 0.8
Surveys · Philippine Sea	1	15.6	1	15	5.0× / 0.2
Towing · South Atlantic Ocean	1	15.5	0	—	new / 0
Other · South Atlantic Ocean	1	13.8	1	13	1.3× / 0.8
Surveys · South Pacific Ocean	1	11.4	1	60	2.5× / 0.4
Other · Celtic Sea	1	11	0	—	5.0× / 0.2
Surveys · Mediterranean Sea - Western Basin	1	7.3	1	7	2.5× / 0.4
Other · Arabian Sea	1	7	0	—	5.0× / 0.2
Derelicts · Arafura Sea	1	7	0	—	new / 0
Spills · North Atlantic Ocean	1	7	1	7	0.6× / 1.8
Icebergs · South Atlantic Ocean	1	6.9	0	—	0.6× / 1.6
Derelicts · Indian Ocean	1	6.7	0	—	2.5× / 0.4
Derelicts · Timor Sea	1	6.4	0	—	5.0× / 0.2
Derelicts · South Pacific Ocean	1	6.2	0	—	5.0× / 0.2
Derelicts · Celtic Sea	1	6.1	0	—	new / 0
Other · Irish Sea and St. George's Channel	1	6.1	1	6	5.0× / 0.2
Cable ops · Java Sea	1	5.8	0	—	new / 0
Ordnance · Persian Gulf	1	5.6	0	—	0.6× / 1.8
Debris · English Channel	1	5.5	1	5	new / 0
Quakes · Philippine Sea	1	5.3	0	—	0.5× / 2.2
Cable ops · Inner Seas off the West Coast of Scotland	1	5.2	0	—	0.8× / 1.2
Exercises · Persian Gulf	1	5.2	0	—	new / 0
Incidents · Mediterranean Sea - Western Basin	1	5	0	—	new / 0
Exercises · Red Sea	1	5	0	—	new / 0
Nav aids · Arabian Sea	1	4.9	0	—	2.5× / 0.4
Surveys · English Channel	1	4.3	1	4	0.3× / 4
Nav aids · Malacca Strait	1	4.1	1	4	new / 0
Quakes · Celebes Sea	1	3	0	—	new / 0
Quakes · Indian Ocean	1	3	0	—	0.4× / 2.6
Quakes · Molukka Sea	1	3	0	—	2.5× / 0.4
Exercises · Norwegian Sea	1	2.6	1	2	5.0× / 0.2
Surveys · Celtic Sea	1	2.4	1	2	0.2× / 5.6
Incidents · Bismarck Sea	1	2.2	0	—	5.0× / 0.2
Cable ops · Black Sea	1	2.2	1	2	5.0× / 0.2
Ordnance · Sea of Azov	1	1.8	0	—	new / 0
Surveys · Alboran Sea	1	1.4	0	—	new / 0
Surveys · Eastern China Sea	1	1.4	1	1	5.0× / 0.2
Debris · South Atlantic Ocean	1	1	0	—	new / 0
Incidents · Ionian Sea	1	0.9	0	—	2.5× / 0.4
Incidents · Adriatic Sea	1	0.6	0	—	new / 0
Derelicts · Ionian Sea	1	0.5	0	—	new / 0
Surveys · Irish Sea and St. George's Channel	1	0.3	1	0	0.6× / 1.8
Wrecks · English Channellong running	0	120	4	1,035	— / 0
Wrecks · South China Sea	0	94.5	3	215	— / 0
Nav aids · Irish Sea and St. George's Channellong running	0	90	3	727	0.0× / 1
Wrecks · Baltic Sealong running	0	60	2	487	— / 0
Wrecks · Coral Sealong running	0	60	2	449	— / 0
Nav aids · Great Australian Bightlong running	0	60	2	376	0.0× / 0.2
Wrecks · Irish Sea and St. George's Channellong running	0	60	2	666	— / 0
Wrecks · North Sea	0	60	2	313	— / 0
War risk · Persian Gulf	0	60	2	88	— / 0
Volcanic · Philippine Sea	0	60	2	221	— / 0
Nav aids · Singapore Straitlong running	0	60	2	413	0.0× / 0.2
Nav aids · South China Sea	0	60	2	320	0.0× / 0.2
Incidents · Tyrrhenian Sea	0	60	2	45	— / 0
Wrecks · Tyrrhenian Sealong running	0	60	2	446	— / 0
Other · South China Sea	0	45	1	116	— / 0
Cable ops · Caribbean Sea	0	44.9	1	181	0.0× / 0.6
Nav aids · Gulf of Suez	0	34.5	1	243	— / 0
Nav aids · Adriatic Sea	0	30	1	333	— / 0
Incidents · Andaman or Burma Sea	0	30	1	40	— / 0
Cable ops · Bay of Bengal	0	30	1	76	0.0× / 0.2
Nav aids · Bering Sea	0	30	1	271	— / 0
Other · Black Sea	0	30	1	60	— / 0
Nav aids · Caribbean Sea	0	30	1	334	0.0× / 0.4
Wrecks · Celtic Sea	0	30	1	165	— / 0
Nav aids · Eastern China Sealong running	0	30	1	554	— / 0
Other · Greenland Sealong running	0	30	1	615	— / 0
Ordnance · Indian Ocean	0	30	1	89	— / 0
Wrecks · Kattegatlong running	0	30	1	435	0.0× / 0.2
Incidents · Laccadive Sea	0	30	1	31	— / 0
Ordnance · Ligurian Sea	0	30	1	72	— / 0
Incidents · Malacca Strait	0	30	1	44	0.0× / 0.2
Wrecks · Malacca Strait	0	30	1	308	0.0× / 0.2
Ordnance · North Pacific Ocean	0	30	1	201	0.0× / 0.2
Wrecks · North Pacific Ocean	0	30	1	201	— / 0
Other · North Sealong running	0	30	1	757	0.0× / 1.8
Nav aids · Philippine Sea	0	30	1	320	— / 0
Nav aids · Red Sea	0	30	1	43	— / 0
Nav aids · Savu Sea	0	30	1	56	— / 0
Wrecks · Sea of Okhotsk	0	30	1	211	— / 0
Nav aids · Skagerrak	0	30	1	301	— / 0
Wrecks · Skagerraklong running	0	30	1	538	— / 0
Nav aids · Solomon Sea	0	30	1	65	0.0× / 0.2
Structures · South China Sea	0	30	1	171	— / 0
Nav aids · Sulu Sealong running	0	30	1	473	— / 0
Nav aids · Timor Sealong running	0	30	1	826	— / 0
Nav aids · Tyrrhenian Sealong running	0	30	1	371	0.0× / 1.8
Surveys · South Atlantic Ocean	0	22.3	0	—	0.0× / 1.4
Ordnance · Gulf of Aden	0	16.7	0	—	— / 0
Other · Sea of Marmara	0	14	0	—	— / 0
Incidents · Aegean Sea	0	11.5	0	—	— / 0
Incidents · Ligurian Sea	0	11.5	0	—	— / 0
Other · Coral Sea	0	10.3	0	—	0.0× / 0.2
Surveys · Ionian Sea	0	10	0	—	0.0× / 1.4
Wrecks · South Pacific Ocean	0	5.7	0	—	— / 0
Wrecks · Persian Gulf	0	4.5	0	—	0.0× / 0.4
Wrecks · Red Sea	0	4.5	0	—	— / 0
Structures · Balearic (Iberian Sea)	0	3.6	0	—	— / 0
Debris · Philippine Sea	0	3.6	0	—	— / 0
Icebergs · South Pacific Ocean	0	3	0	—	0.0× / 0.6
Cable ops · Bass Strait	0	2.1	0	—	0.0× / 0.2
Derelicts · Caribbean Sea	0	1	0	—	0.0× / 0.2
Other · Mediterranean Sea - Eastern Basin	0	1	0	—	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2002-04, 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.