Sea Ledger, April 2008

2008-04-01 to 2008-04-30 · archive

issued: 363
warning-days in force: 9,064
in force at month end: 298
sea × type cells: 212

baseline: same month, previous 5 years (2007-04, 2006-04, 2005-04, 2004-04, 2003-04)

By type

type	issued	warning-days	in force at end
Cable ops	73	1,328.2	48
Incidents	62	1,266.4	44
Exercises	55	648	17
Quakes	48	142.2	5
Nav aids	47	1,937.4	61
Surveys	15	1,993.5	67
Other	12	275.4	10
Derelicts	11	140.6	6
Icebergs	9	47	2
Spills	9	147	3
Containers	8	45.1	0
Debris	5	52.8	4
Missiles	4	60	2
Ordnance	3	29.6	2
Wrecks	1	592.8	15
Restricted	1	117.9	4
Volcanic	0	150	5
Piracy	0	30	1
Structures	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	123.4	4	125	1.0× / 25.8
Quakes · Coral Seasurge	14	40.4	2	23	4.4× / 3.2
Incidents · Philippine Sea	12	207.3	8	57	1.9× / 6.2
Exercises · North Pacific Ocean	12	69	4	34	1.3× / 9.6
Incidents · North Pacific Ocean	11	209.2	8	63	1.2× / 9
Cable ops · English Channelsurge	11	28.2	1	31	28× / 0.4
Icebergs · South Atlantic Ocean	8	44.2	2	22	1.9× / 4.2
Incidents · South Pacific Ocean	7	169.5	4	72	1.1× / 6.6
Quakes · South Pacific Ocean	7	22.7	0	—	0.6× / 12.8
Nav aids · North Seasurge	6	147.9	5	114	2.3× / 2.6
Nav aids · Gulf of Mexicosurge	6	122.9	4	201	5.0× / 1.2
Exercises · South Atlantic Ocean	6	48.4	2	66	1.7× / 3.6
Nav aids · North Atlantic Oceansurge	6	36.3	2	48	3.0× / 2
Incidents · South China Seasurge	5	116.8	4	69	2.8× / 1.8
Incidents · North Atlantic Ocean	5	111.3	5	66	1.3× / 4
Cable ops · North Atlantic Ocean	5	70.1	2	355	1.8× / 2.8
Spills · Gulf of Mexico	5	64	2	42	1.4× / 3.6
Exercises · Arabian Sea	5	39.2	1	33	1.9× / 2.6
Containers · Celtic Seanew	5	25.1	0	—	new / 0
Nav aids · Inner Seas off the West Coast of Scotland	5	18.4	1	23	1.5× / 3.4
Quakes · North Pacific Ocean	5	13.8	1	22	1.1× / 4.6
Quakes · Banda Seasurge	5	13.2	1	28	13× / 0.4
Cable ops · Bay of Bengalsurge	4	222.7	8	162	2.0× / 2
Surveys · North Atlantic Oceansurge	4	114.8	3	267	2.5× / 1.6
Nav aids · Coral Sealong running	4	102.2	3	505	1.7× / 2.4
Cable ops · Gulf of Mexicosurge	4	90.5	4	176	20× / 0.2
Exercises · Yellow Seasurge	4	79.2	2	34	2.5× / 1.6
Exercises · Bay of Bengal	4	64.8	3	71	0.7× / 5.4
Missiles · North Pacific Ocean	4	60	2	32	0.7× / 5.4
Exercises · North Atlantic Ocean	4	53.9	0	—	0.4× / 10
Incidents · South Atlantic Ocean	4	35.7	1	30	0.8× / 5
Quakes · Philippine Seasurge	4	12.1	0	—	2.0× / 2
Quakes · South Atlantic Oceansurge	4	11.3	1	16	6.7× / 0.6
Spills · North Atlantic Ocean	3	44	1	37	1.3× / 2.4
Exercises · Baltic Seasurge	3	29.7	0	—	3.8× / 0.8
Cable ops · Philippine Seanew	3	27.1	1	39	new / 0
Incidents · Coral Sea	3	25.1	1	42	0.8× / 4
Cable ops · South Pacific Oceansurge	3	13.7	2	33	3.0× / 1
Exercises · South Pacific Ocean	3	10.5	0	—	0.8× / 3.6
Quakes · Indian Ocean	3	10.4	0	—	0.4× / 7.8
Exercises · Bering Seasurge	3	7.2	0	—	3.8× / 0.8
Nav aids · Irish Sea and St. George's Channel	3	5.6	0	—	1.9× / 1.6
Other · English Channelsurge	3	3.8	0	—	3.0× / 1
Cable ops · Mediterranean Sea - Eastern Basin	2	127.1	5	82	0.5× / 3.8
Cable ops · South China Sea	2	98.2	4	207	1.7× / 1.2
Incidents · Mediterranean Sea - Eastern Basin	2	75.3	2	71	0.5× / 4
Incidents · Bay of Bengal	2	65.6	2	67	10× / 0.2
Nav aids · South Pacific Ocean	2	65.4	3	326	1.4× / 1.4
Exercises · Japan Sea	2	63.3	2	34	0.7× / 3
Surveys · Indian Ocean	2	50.5	2	72	10× / 0.2
Exercises · Philippine Sea	2	32.6	0	—	2.5× / 0.8
Cable ops · Singapore Straitnew	2	31.2	1	25	new / 0
Ordnance · North Sea	2	29.1	1	21	2.0× / 1
Cable ops · Laccadive Sea	2	26.9	1	27	3.3× / 0.6
Incidents · Arabian Sea	2	26.6	2	21	3.3× / 0.6
Nav aids · Philippine Seanew	2	24.3	1	21	new / 0
Other · South Pacific Ocean	2	23.1	1	22	2.5× / 0.8
Surveys · Persian Gulf	2	13.1	1	25	2.5× / 0.8
Derelicts · North Atlantic Ocean	2	12.6	0	—	2.5× / 0.8
Debris · Philippine Seanew	2	9	0	—	new / 0
Derelicts · South Pacific Ocean	2	8.5	0	—	5.0× / 0.4
Derelicts · South China Sea	2	6.8	2	3	10× / 0.2
Nav aids · Mediterranean Sea - Western Basin	2	6.6	0	—	1.3× / 1.6
Nav aids · Great Australian Bight	2	6.2	1	28	2.0× / 1
Quakes · Bering Sea	2	6	0	—	1.7× / 1.2
Derelicts · South Atlantic Ocean	2	5.8	1	5	1.3× / 1.6
Other · North Sea	2	3.9	0	—	1.4× / 1.4
Surveys · Arctic Oceanlong running	1	427.3	15	1,574	new / 0
Nav aids · Gulf of California	1	165.4	6	151	new / 0
Nav aids · Indian Oceanlong running	1	125	4	698	0.7× / 1.4
Nav aids · Gulf of Suez	1	60	2	35	0.8× / 1.2
Wrecks · Laccadive Sealong running	1	59.7	2	441	new / 0
Surveys · Gulf of Guinea	1	43	2	111	new / 0
Nav aids · English Channel	1	42	0	—	0.6× / 1.6
Nav aids · Tasman Sea	1	40.2	1	245	1.3× / 0.8
Nav aids · Celtic Sea	1	38.1	1	69	0.6× / 1.6
Exercises · Laccadive Sea	1	36.7	0	—	0.1× / 9.4
Incidents · Southern Ocean	1	34.7	2	45	new / 0
Incidents · Tasman Sea	1	34	0	—	0.4× / 2.4
Other · North Atlantic Ocean	1	31.1	1	364	0.8× / 1.2
Cable ops · Japan Sea	1	30.6	2	146	new / 0
Cable ops · Andaman or Burma Sea	1	21.4	1	21	5.0× / 0.2
Incidents · Tyrrhenian Sea	1	17.8	1	17	1.3× / 0.8
Cable ops · Norwegian Sea	1	17.3	1	17	5.0× / 0.2
Incidents · Adriatic Sea	1	16.5	1	16	new / 0
Cable ops · Great Australian Bight	1	16	0	—	new / 0
Cable ops · Gulf of Suez	1	15.8	1	32	1.3× / 0.8
Surveys · Bass Strait	1	14	0	—	new / 0
Spills · Philippine Sea	1	14	0	—	new / 0
Surveys · Black Sea	1	13.5	1	13	1.3× / 0.8
Surveys · Andaman or Burma Sea	1	13.4	1	13	new / 0
Incidents · Bay of Biscay	1	11.6	1	11	1.3× / 0.8
Cable ops · Inner Seas off the West Coast of Scotland	1	7.3	0	—	new / 0
Debris · Mediterranean Sea - Eastern Basin	1	7	1	6	new / 0
Containers · Caribbean Sea	1	6.9	0	—	5.0× / 0.2
Cable ops · Ionian Sea	1	6.9	0	—	5.0× / 0.2
Containers · North Pacific Ocean	1	6.9	0	—	2.5× / 0.4
Exercises · Red Sea	1	6.5	0	—	1.3× / 0.8
Containers · South Pacific Ocean	1	6.2	0	—	new / 0
Derelicts · Timor Sea	1	6.1	0	—	5.0× / 0.2
Restricted · South Atlantic Ocean	1	5.4	1	5	new / 0
Other · Irish Sea and St. George's Channel	1	5.1	1	5	new / 0
Exercises · Andaman or Burma Sea	1	5	0	—	1.7× / 0.6
Nav aids · Timor Sea	1	5	0	—	5.0× / 0.2
Surveys · Celtic Sea	1	4.6	1	4	1.7× / 0.6
Exercises · English Channel	1	4.5	0	—	new / 0
Incidents · Great Australian Bight	1	4.3	0	—	1.7× / 0.6
Other · Bering Sea	1	4	0	—	new / 0
Debris · Indian Ocean	1	4	1	36	new / 0
Exercises · South China Sea	1	4	0	—	1.3× / 0.8
Cable ops · Tasman Sea	1	4	0	—	2.5× / 0.4
Derelicts · Mediterranean Sea - Eastern Basin	1	3.8	0	—	5.0× / 0.2
Derelicts · Bay of Bengal	1	3	0	—	new / 0
Quakes · Ceram Sea	1	3	0	—	new / 0
Quakes · Japan Sea	1	3	0	—	5.0× / 0.2
Quakes · Molukka Sea	1	3	0	—	1.0× / 1
Quakes · Tasman Sea	1	3	0	—	new / 0
Surveys · English Channel	1	2.9	0	—	2.5× / 0.4
Icebergs · North Atlantic Ocean	1	2.8	0	—	0.2× / 4.2
Debris · Tasman Sea	1	2.8	1	2	new / 0
Nav aids · Gulf of Alaska	1	2.6	0	—	new / 0
Cable ops · Eastern China Sea	1	2.5	1	2	2.5× / 0.4
Cable ops · Indian Ocean	1	2.4	1	2	5.0× / 0.2
Other · Great Australian Bight	1	1	1	0	5.0× / 0.2
Exercises · Gulf of Mexico	1	1	0	—	new / 0
Ordnance · Baltic Sea	1	0.5	1	0	new / 0
Incidents · Timor Sea	1	0.5	0	—	5.0× / 0.2
Exercises · Indian Ocean	1	0.4	0	—	1.3× / 0.8
Other · Inner Seas off the West Coast of Scotland	1	0.3	0	—	5.0× / 0.2
Incidents · Laccadive Sea	1	0.3	1	0	2.5× / 0.4
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	0.3	0	—	new / 0
Incidents · Java Sea	1	0.2	0	—	new / 0
Surveys · Beaufort Sealong running	0	690	23	1,574	— / 0
Nav aids · North Pacific Ocean	0	457.8	15	201	0.0× / 0.2
Surveys · Baffin Baylong running	0	150	5	1,672	— / 0
Wrecks · Persian Gulflong running	0	136.1	2	641	0.0× / 0.6
Nav aids · Caribbean Sealong running	0	131.3	4	469	0.0× / 0.4
Exercises · Aegean Sea	0	90	3	95	0.0× / 2.6
Wrecks · Arabian Sealong running	0	90	3	739	0.0× / 0.4
Surveys · Laptev Sealong running	0	90	3	708	— / 0
Wrecks · South China Sealong running	0	90	3	484	— / 0
Cable ops · Arabian Sea	0	85.4	2	142	0.0× / 2.8
Nav aids · Persian Gulflong running	0	80.7	1	620	0.0× / 0.2
Cable ops · Black Sea	0	66.5	1	117	0.0× / 0.8
Derelicts · Arabian Sea	0	60	2	309	0.0× / 0.2
Cable ops · Caribbean Sealong running	0	60	2	391	0.0× / 0.6
Nav aids · Laccadive Sealong running	0	60	2	532	0.0× / 0.8
Other · Mediterranean Sea - Eastern Basin	0	60	2	157	0.0× / 0.6
Nav aids · South Atlantic Ocean	0	60	2	162	0.0× / 2.4
Surveys · The Northwestern Passageslong running	0	60	2	557	— / 0
Surveys · South Pacific Ocean	0	58	1	180	0.0× / 0.2
Incidents · Indian Ocean	0	55.4	1	51	0.0× / 4
Surveys · Mediterranean Sea - Eastern Basin	0	53	1	96	0.0× / 1.8
Wrecks · Philippine Sealong running	0	49.4	1	751	0.0× / 0.2
Cable ops · Persian Gulf	0	41.6	1	56	0.0× / 1
Derelicts · Indian Ocean	0	34	1	45	0.0× / 0.8
Restricted · North Atlantic Ocean	0	33.6	1	30	0.0× / 0.4
Nav aids · Andaman or Burma Sea	0	30	1	271	— / 0
Nav aids · Arabian Sealong running	0	30	1	505	0.0× / 1.6
Surveys · Arabian Sea	0	30	1	138	— / 0
Debris · Arctic Oceanlong running	0	30	1	1,226	— / 0
Other · Arctic Ocean	0	30	1	239	— / 0
Volcanic · Banda Sealong running	0	30	1	394	0.0× / 0.2
Restricted · Bay of Bengallong running	0	30	1	743	0.0× / 0.2
Wrecks · Bay of Bengallong running	0	30	1	698	— / 0
Surveys · Bering Sea	0	30	1	225	0.0× / 0.2
Other · Caribbean Sea	0	30	1	294	0.0× / 0.2
Surveys · Chukchi Sealong running	0	30	1	1,107	0.0× / 0.2
Surveys · Greenland Sealong running	0	30	1	1,890	— / 0
Cable ops · Gulf of Aden	0	30	1	97	— / 0
Structures · Gulf of Mexico	0	30	1	230	0.0× / 0.4
Structures · Gulf of Suezlong running	0	30	1	378	0.0× / 0.2
Surveys · Gulf of Suez	0	30	1	91	0.0× / 0.2
Other · Gulf of Thailandlong running	0	30	1	503	— / 0
Volcanic · North Pacific Ocean	0	30	1	57	— / 0
Wrecks · North Pacific Oceanlong running	0	30	1	413	0.0× / 0.2
Piracy · Persian Gulf	0	30	1	112	— / 0
Volcanic · Philippine Sea	0	30	1	71	0.0× / 1
Volcanic · Red Sea	0	30	1	212	— / 0
Wrecks · Red Sealong running	0	30	1	679	— / 0
Volcanic · Savu Sea	0	30	1	251	— / 0
Restricted · Sea of Marmara	0	30	1	49	— / 0
Wrecks · South Atlantic Ocean	0	30	1	155	— / 0
Nav aids · South China Sea	0	30	1	38	— / 0
Other · South China Sealong running	0	30	1	609	— / 0
Surveys · Tasman Sea	0	30	1	81	0.0× / 0.6
Cable ops · Timor Sea	0	30	1	156	— / 0
Cable ops · North Pacific Ocean	0	28	0	—	— / 0
Incidents · Ionian Sea	0	25.4	0	—	— / 0
Other · Andaman or Burma Sea	0	19.4	0	—	— / 0
Nav aids · Baltic Sea	0	19.4	0	—	— / 0
Wrecks · Coral Sea	0	19.4	0	—	0.0× / 0.2
Wrecks · Malacca Strait	0	19.4	0	—	— / 0
Nav aids · Mozambique Channel	0	19.4	0	—	0.0× / 0.8
Incidents · Eastern China Sea	0	18.9	0	—	0.0× / 0.2
Restricted · Alboran Sea	0	14.5	0	—	0.0× / 0.4
Spills · North Pacific Ocean	0	13	0	—	0.0× / 0.4
Surveys · North Sea	0	10.4	0	—	0.0× / 0.8
Spills · The Coastal Waters of Southeast Alaska and British Columbia	0	7	0	—	0.0× / 0.4
Surveys · Bay of Bengal	0	5	0	—	0.0× / 1.2

Cite: seahazards.com Sea Ledger, 2008-04, 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.