Sea Ledger, December 2008

2008-12-01 to 2008-12-31 · archive

issued: 360
warning-days in force: 9,113
in force at month end: 287
sea × type cells: 177

baseline: same month, previous 5 years (2007-12, 2006-12, 2005-12, 2004-12, 2003-12)

By type

type	issued	warning-days	in force at end
Incidents	82	1,039.3	37
Exercises	62	711.5	10
Nav aids	58	2,465.4	77
Cable ops	55	1,029.6	39
Quakes	34	104.3	1
Derelicts	17	89.7	3
Other	13	364	13
Icebergs	10	60.2	2
Spills	7	123	0
Surveys	6	2,155.9	71
Missiles	5	67.1	2
Debris	5	46.1	4
Piracy	3	94.9	3
Wrecks	3	505.8	17
Volcanic	0	124	4
Restricted	0	70.6	2
Structures	0	31	1
Ordnance	0	31	1

By sea and type · 177 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	22	210.9	8	53	1.4× / 16.2
Incidents · South Pacific Oceansurge	22	148.9	5	66	2.9× / 7.6
Nav aids · North Seasurge	11	218.4	7	359	2.3× / 4.8
Exercises · South Atlantic Oceansurge	11	73.7	0	—	14× / 0.8
Quakes · South Pacific Ocean	10	31.2	0	—	0.7× / 14.4
Incidents · North Atlantic Ocean	8	131.8	5	62	1.6× / 5
Incidents · Mediterranean Sea - Eastern Basinsurge	8	106.4	6	58	4.0× / 2
Incidents · South China Sea	8	100.6	3	42	1.5× / 5.4
Exercises · Yellow Seasurge	8	68.5	0	—	3.6× / 2.2
Icebergs · South Atlantic Ocean	8	44.9	2	27	1.8× / 4.4
Incidents · Indian Oceansurge	7	116.2	4	58	5.0× / 1.4
Exercises · North Atlantic Ocean	7	82.4	2	87	0.8× / 8.2
Exercises · Philippine Seasurge	7	61	0	—	12× / 0.6
Nav aids · Coral Sea	7	53.8	1	302	1.9× / 3.6
Incidents · North Pacific Ocean	6	197.3	8	51	0.6× / 10.4
Cable ops · Arabian Sea	6	79.9	2	78	1.8× / 3.4
Nav aids · Irish Sea and St. George's Channelsurge	6	72.6	2	73	2.5× / 2.4
Exercises · North Pacific Ocean	6	63.4	1	35	0.9× / 6.4
Quakes · North Pacific Ocean	6	20.6	0	—	0.8× / 7.8
Nav aids · South Atlantic Oceanlong running	5	256.8	9	407	1.5× / 3.4
Cable ops · Bay of Bengalsurge	5	116.8	6	33	2.8× / 1.8
Cable ops · Mediterranean Sea - Eastern Basin	5	92.6	3	44	1.5× / 3.4
Spills · Gulf of Mexico	5	84	0	—	1.0× / 5
Missiles · North Pacific Ocean	5	67.1	2	31	0.9× / 5.4
Exercises · South China Seanew	5	46.5	1	35	new / 0
Incidents · Philippine Sea	5	19.9	1	30	1.0× / 5
Nav aids · The Coastal Waters of Southeast Alaska and British Columbianew	5	4.5	1	27	new / 0
Exercises · Bay of Bengal	4	70	2	38	0.6× / 7
Nav aids · Inner Seas off the West Coast of Scotlandsurge	4	32.9	1	175	2.5× / 1.6
Quakes · Indian Ocean	4	10.5	1	33	0.6× / 6.8
Incidents · Southern Oceansurge	4	2.3	1	22	5.0× / 0.8
Other · Mediterranean Sea - Eastern Basinsurgelong running	3	114.1	3	402	7.5× / 0.4
Incidents · South Atlantic Ocean	3	28.6	1	26	0.6× / 5
Cable ops · Java Seasurge	3	23.5	1	35	7.5× / 0.4
Derelicts · North Atlantic Ocean	3	15.9	1	14	0.9× / 3.2
Quakes · Coral Seasurge	3	9	0	—	5.0× / 0.6
Quakes · North Atlantic Oceansurge	3	9	0	—	3.8× / 0.8
Nav aids · Gulf of Alaskanew	3	7.8	0	—	new / 0
Other · North Seasurge	3	7.5	0	—	3.8× / 0.8
Exercises · South Pacific Ocean	3	7.5	0	—	1.1× / 2.8
Debris · North Pacific Oceansurge	3	7.4	2	5	15× / 0.2
Nav aids · Gulf of Mexiconewlong running	2	99.8	3	446	new / 0
Nav aids · North Atlantic Ocean	2	62.7	2	177	0.7× / 2.8
Exercises · Japan Sea	2	56.7	0	—	1.4× / 1.4
Piracy · Gulf of Adennew	2	56.5	2	28	new / 0
Incidents · Bay of Bengal	2	52.2	1	29	1.4× / 1.4
Cable ops · North Sea	2	39.4	1	35	1.3× / 1.6
Spills · North Pacific Ocean	2	39	0	—	1.7× / 1.2
Exercises · Laccadive Sea	2	31.3	1	38	0.2× / 8.8
Nav aids · English Channel	2	26.3	2	16	1.0× / 2
Surveys · Arabian Sea	2	24.5	2	19	3.3× / 0.6
Cable ops · Celebes Seanew	2	21.1	0	—	new / 0
Derelicts · Bay of Biscay	2	18.5	0	—	10× / 0.2
Cable ops · Yellow Seanew	2	18.2	1	18	new / 0
Wrecks · Inner Seas off the West Coast of Scotland	2	16.3	1	16	10× / 0.2
Derelicts · South China Sea	2	16	0	—	1.4× / 1.4
Icebergs · South Pacific Ocean	2	15.3	0	—	1.0× / 2
Incidents · Coral Sea	2	12.9	0	—	1.1× / 1.8
Nav aids · Mediterranean Sea - Eastern Basin	2	11	1	15	1.7× / 1.2
Exercises · Arabian Sea	2	9.4	0	—	0.7× / 3
Derelicts · South Pacific Ocean	2	6.5	0	—	5.0× / 0.4
Quakes · Philippine Sea	2	6	0	—	0.8× / 2.6
Other · Ionian Sea	2	3.8	1	63	10× / 0.2
Nav aids · Great Australian Bight	2	3	0	—	3.3× / 0.6
Cable ops · Celtic Sea	2	2.5	0	—	10× / 0.2
Nav aids · North Pacific Oceanlong running	1	569.3	17	446	0.7× / 1.4
Nav aids · Gulf of Californialong running	1	308.6	9	366	1.3× / 0.8
Nav aids · South Pacific Oceanlong running	1	155	5	571	1.0× / 1
Nav aids · Persian Gulf	1	122.8	3	171	2.5× / 0.4
Cable ops · South China Sealong running	1	106	3	452	5.0× / 0.2
Nav aids · Gulf of Suez	1	101.5	4	243	2.5× / 0.4
Other · Indian Ocean	1	62	2	196	5.0× / 0.2
Surveys · Mediterranean Sea - Eastern Basin	1	58.4	2	36	0.6× / 1.6
Surveys · Indian Ocean	1	53.5	2	61	0.5× / 2
Wrecks · Persian Gulf	1	45.4	2	47	5.0× / 0.2
Cable ops · Indian Ocean	1	37.5	2	75	5.0× / 0.2
Other · North Atlantic Oceanlong running	1	34.2	1	609	1.7× / 0.6
Surveys · South Atlantic Ocean	1	30.4	1	61	0.4× / 2.6
Exercises · Ionian Sea	1	27.2	1	27	0.5× / 2.2
Incidents · Laccadive Sea	1	21.9	0	—	1.0× / 1
Incidents · North Sea	1	17.3	1	17	2.5× / 0.4
Incidents · Arabian Sea	1	16.9	0	—	1.3× / 0.8
Other · Bismarck Sea	1	14.9	1	14	new / 0
Nav aids · Laccadive Sea	1	13.3	0	—	0.8× / 1.2
Incidents · Andaman or Burma Sea	1	13	0	—	2.5× / 0.4
Cable ops · Eastern China Sea	1	9.3	1	9	1.3× / 0.8
Surveys · Norwegian Sea	1	9.2	1	9	new / 0
Cable ops · Gulf of Mexico	1	8.4	1	8	2.5× / 0.4
Exercises · Baltic Sea	1	8.1	0	—	5.0× / 0.2
Piracy · South China Sea	1	7.4	0	—	new / 0
Incidents · Gulf of Aden	1	6.5	1	6	new / 0
Derelicts · Gulf of Aden	1	6.4	0	—	new / 0
Derelicts · North Pacific Ocean	1	6.3	0	—	0.5× / 2
Derelicts · Caribbean Sea	1	6.2	0	—	1.3× / 0.8
Exercises · Coral Sea	1	6	0	—	new / 0
Debris · Gulf of Mexico	1	6	0	—	new / 0
Cable ops · Makassar Strait	1	5.9	1	5	5.0× / 0.2
Derelicts · Tasman Sea	1	5.3	1	5	new / 0
Exercises · Andaman or Burma Sea	1	4.6	0	—	1.7× / 0.6
Cable ops · Tasman Sea	1	4.6	1	4	new / 0
Derelicts · Mediterranean Sea - Eastern Basin	1	3.9	0	—	1.3× / 0.8
Other · South Atlantic Ocean	1	3.4	0	—	1.3× / 0.8
Quakes · Arabian Sea	1	3	0	—	5.0× / 0.2
Quakes · Banda Sea	1	3	0	—	1.3× / 0.8
Quakes · Molukka Sea	1	3	0	—	1.7× / 0.6
Quakes · Solomon Sea	1	3	0	—	0.7× / 1.4
Quakes · South Atlantic Ocean	1	3	0	—	1.7× / 0.6
Quakes · Southern Ocean	1	3	0	—	2.5× / 0.4
Nav aids · Bristol Channel	1	2.9	0	—	1.3× / 0.8
Derelicts · Arabian Sea	1	2.7	0	—	2.5× / 0.4
Exercises · Gulf of Mexico	1	2.3	0	—	new / 0
Debris · Indian Ocean	1	1.7	1	1	new / 0
Derelicts · South Atlantic Ocean	1	1.3	0	—	0.4× / 2.6
Derelicts · Indian Ocean	1	0.7	1	0	1.7× / 0.6
Incidents · Celtic Sea	1	0.3	0	—	new / 0
Incidents · Arafura Sea	1	0.1	0	—	5.0× / 0.2
Other · Inner Seas off the West Coast of Scotland	1	0.1	1	0	5.0× / 0.2
Surveys · Beaufort Sealong running	0	744	24	1,819	— / 0
Surveys · Arctic Oceanlong running	0	496	16	1,819	— / 0
Surveys · Baffin Baylong running	0	186	6	1,917	— / 0
Surveys · The Northwestern Passageslong running	0	186	6	802	— / 0
Cable ops · Caribbean Sea	0	93	3	230	0.0× / 0.2
Surveys · Laptev Sealong running	0	93	3	953	— / 0
Wrecks · South Atlantic Ocean	0	93	3	81	0.0× / 0.4
Wrecks · South China Sealong running	0	93	3	729	0.0× / 0.2
Wrecks · The Northwestern Passages	0	93	3	116	— / 0
Exercises · Aegean Sea	0	92.9	2	340	0.0× / 3.8
Nav aids · Celtic Sea	0	76.6	2	54	0.0× / 1.8
Nav aids · Indian Ocean	0	62	2	279	0.0× / 0.8
Volcanic · Indian Ocean	0	62	2	196	— / 0
Nav aids · Malacca Strait	0	62	2	170	— / 0
Surveys · Malacca Strait	0	62	2	175	0.0× / 0.2
Nav aids · South China Sea	0	62	2	283	— / 0
Wrecks · English Channel	0	35.7	1	162	0.0× / 0.4
Restricted · Alboran Sea	0	31	1	153	— / 0
Cable ops · Andaman or Burma Sea	0	31	1	47	0.0× / 0.2
Debris · Arctic Oceanlong running	0	31	1	1,471	0.0× / 0.2
Other · Arctic Oceanlong running	0	31	1	484	— / 0
Wrecks · Baltic Sea	0	31	1	71	— / 0
Volcanic · Banda Sealong running	0	31	1	639	— / 0
Wrecks · Bay of Bengallong running	0	31	1	943	— / 0
Surveys · Bering Sea	0	31	1	76	— / 0
Surveys · Chukchi Sealong running	0	31	1	1,352	— / 0
Other · Coral Sea	0	31	1	41	— / 0
Surveys · Greenland Sealong running	0	31	1	2,135	— / 0
Cable ops · Gulf of Suez	0	31	1	33	0.0× / 0.4
Surveys · Gulf of Suez	0	31	1	336	0.0× / 0.2
Other · Gulf of Thailandlong running	0	31	1	748	0.0× / 0.2
Wrecks · Laccadive Sea	0	31	1	274	— / 0
Surveys · Mediterranean Sea - Western Basin	0	31	1	34	— / 0
Wrecks · North Atlantic Ocean	0	31	1	218	— / 0
Ordnance · North Sea	0	31	1	61	— / 0
Cable ops · Persian Gulf	0	31	1	50	0.0× / 0.6
Piracy · Persian Gulf	0	31	1	357	— / 0
Surveys · Persian Gulf	0	31	1	127	0.0× / 0.2
Nav aids · Philippine Sea	0	31	1	255	0.0× / 0.4
Volcanic · Philippine Sea	0	31	1	179	0.0× / 0.8
Cable ops · Red Sea	0	31	1	50	— / 0
Nav aids · Red Sea	0	31	1	103	0.0× / 0.2
Other · South China Sea	0	31	1	168	— / 0
Structures · South China Sea	0	31	1	237	— / 0
Restricted · Strait of Gibraltar	0	31	1	134	— / 0
Cable ops · Sulu Sea	0	31	1	147	— / 0
Incidents · Mediterranean Sea - Western Basin	0	19.4	0	—	— / 0
Surveys · Inner Seas off the West Coast of Scotland	0	14.5	0	—	— / 0
Nav aids · Arabian Sea	0	12.4	0	—	0.0× / 3.2
Surveys · Gulf of Guinea	0	12.4	0	—	— / 0
Incidents · Mozambique Channel	0	12.4	0	—	0.0× / 1.2
Incidents · Tyrrhenian Sea	0	12.4	0	—	0.0× / 0.2
Restricted · Baltic Sea	0	8.6	0	—	— / 0
Wrecks · Arabian Sea	0	5.4	0	—	0.0× / 0.2
Nav aids · Tasman Sea	0	5.4	0	—	0.0× / 0.4
Cable ops · Gulf of Thailand	0	5	0	—	0.0× / 0.2
Incidents · English Channel	0	2	0	—	0.0× / 0.2
Derelicts · Celtic Sea	0	0	0	—	0.0× / 0.6
Piracy · Singapore Strait	0	0	0	—	0.0× / 0.2
Surveys · South Pacific Ocean	0	0	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2008-12, 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.