Sea Ledger, May 2004

2004-05-01 to 2004-05-31 · archive

issued: 313
warning-days in force: 5,671
in force at month end: 187
sea × type cells: 182

baseline: same month, previous 5 years (2003-05, 2002-05, 2001-05, 2000-05, 1999-05)

By type

type	issued	warning-days	in force at end
Exercises	62	808.8	30
Nav aids	43	1,287.7	41
Incidents	42	836.8	22
Surveys	37	748.6	24
Cable ops	35	622	21
Quakes	33	97.8	3
Derelicts	16	111.7	3
Other	11	301.4	10
Spills	9	120	6
Missiles	5	62	2
Ordnance	5	30.5	1
Wrecks	4	419.5	15
Icebergs	3	7.8	3
Debris	3	18.7	0
Restricted	2	37.3	1
War risk	1	90.6	3
Structures	1	1.4	0
Containers	1	6.2	0
Towing	0	31	1
Volcanic	0	31	1

By sea and type · 182 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Surveys · South Atlantic Oceansurge	21	87.9	0	—	11× / 2
Exercises · North Atlantic Ocean	17	105.7	4	63	1.7× / 9.8
Nav aids · North Atlantic Oceansurgelong running	10	153.6	6	418	3.1× / 3.2
Exercises · Mediterranean Sea - Eastern Basinsurge	10	72.4	2	62	7.1× / 1.4
Exercises · Laccadive Seasurge	9	46.9	2	31	2.3× / 4
Quakes · South Pacific Ocean	9	25.6	1	33	1.3× / 7.2
Cable ops · South Atlantic Ocean	8	27.5	0	—	0.3× / 31.6
Cable ops · Arabian Seasurge	7	171.2	6	55	5.0× / 1.4
Incidents · North Pacific Ocean	6	127.5	5	42	0.7× / 9.2
Incidents · South Atlantic Ocean	5	88.3	2	221	1.3× / 4
Missiles · North Pacific Ocean	5	62	2	35	0.8× / 6.4
Nav aids · Indian Oceansurge	5	54.2	2	30	8.3× / 0.6
Incidents · Philippine Sea	5	52.4	3	26	1.7× / 3
Quakes · North Pacific Ocean	5	15.2	2	33	1.0× / 4.8
Quakes · Philippine Seasurge	5	15	0	—	3.6× / 1.4
Nav aids · Mozambique Channelsurge	4	91.7	3	103	2.9× / 1.4
Exercises · Black Sea	4	44.8	1	31	1.8× / 2.2
Incidents · Indian Ocean	4	37.6	3	62	1.1× / 3.8
Derelicts · Gulf of Mexiconew	4	25.3	0	—	new / 0
Quakes · Coral Seasurge	4	12	0	—	2.9× / 1.4
Quakes · South Atlantic Oceannew	4	12	0	—	new / 0
Incidents · Bay of Biscaynew	4	0.8	0	—	new / 0
Nav aids · Bay of Bengalsurgelong running	3	102.1	3	395	15× / 0.2
Cable ops · Laccadive Seasurge	3	64.7	3	80	3.8× / 0.8
Exercises · Mediterranean Sea - Western Basin	3	59.4	2	44	0.9× / 3.4
Cable ops · Mediterranean Sea - Eastern Basinsurge	3	31.7	1	36	2.1× / 1.4
Incidents · North Atlantic Ocean	3	28.9	0	—	0.7× / 4.2
Surveys · Mediterranean Sea - Eastern Basin	3	27.2	1	27	1.5× / 2
Exercises · Japan Seasurge	3	15.8	2	10	15× / 0.2
Surveys · Mediterranean Sea - Western Basin	3	11.4	1	17	1.9× / 1.6
Derelicts · Coral Seasurge	3	9.7	1	25	15× / 0.2
Other · North Sea	3	3.7	0	—	1.7× / 1.8
Nav aids · North Sea	3	1.1	0	—	0.4× / 6.8
Nav aids · South Pacific Ocean	2	125.2	4	152	1.1× / 1.8
Incidents · Mediterranean Sea - Eastern Basin	2	90.7	2	52	0.8× / 2.6
Cable ops · South China Sea	2	80.4	2	99	1.1× / 1.8
Nav aids · Tyrrhenian Sea	2	80.2	0	—	0.8× / 2.4
Incidents · South Pacific Ocean	2	77.5	0	—	0.4× / 5.2
Nav aids · Laccadive Sealong running	2	73.7	1	395	5.0× / 0.4
Exercises · Tyrrhenian Sea	2	40.5	1	45	0.5× / 4
Nav aids · English Channellong running	2	34	2	511	0.6× / 3.2
Spills · Gulf of Mexico	2	34	2	40	1.3× / 1.6
Spills · North Pacific Ocean	2	32	1	33	2.5× / 0.8
Nav aids · Arabian Sea	2	27.6	2	17	10× / 0.2
Spills · The Coastal Waters of Southeast Alaska and British Columbia	2	21	1	21	10× / 0.2
Spills · North Atlantic Ocean	2	19	2	12	1.7× / 1.2
Exercises · Bay of Bengal	2	17.6	0	—	0.9× / 2.2
Surveys · Indian Ocean	2	15.3	0	—	10× / 0.2
Cable ops · North Sea	2	14.7	1	36	0.6× / 3.6
Derelicts · North Atlantic Ocean	2	12.8	0	—	1.0× / 2
Exercises · North Pacific Ocean	2	8.8	0	—	0.2× / 11.6
Exercises · Yellow Seanew	2	7.7	2	4	new / 0
Cable ops · Celtic Sea	2	6.9	0	—	0.7× / 2.8
Exercises · Arabian Sea	2	6.8	1	31	0.6× / 3.2
Quakes · Bismarck Sea	2	6	0	—	1.7× / 1.2
Other · South Pacific Ocean	2	5.5	1	5	2.0× / 1
Cable ops · English Channel	2	3.7	0	—	0.5× / 4.2
Nav aids · Bristol Channel	2	2.1	0	—	1.1× / 1.8
Derelicts · South Atlantic Ocean	2	1.6	0	—	0.8× / 2.4
Icebergs · North Atlantic Ocean	2	0.9	2	0	0.4× / 4.6
Incidents · Gulf of Guinea	2	0.5	0	—	10× / 0.2
Nav aids · South Atlantic Ocean	1	119.6	4	339	0.1× / 7.6
War risk · Persian Gulflong running	1	90.6	3	850	new / 0
Incidents · South China Sea	1	90.2	1	48	0.3× / 3.2
Surveys · Persian Gulf	1	69.4	3	87	new / 0
Nav aids · Persian Gulflong running	1	64.5	3	909	0.6× / 1.8
Cable ops · Bay of Bengal	1	62.7	2	39	1.3× / 0.8
Wrecks · South Atlantic Ocean	1	59.1	2	159	5.0× / 0.2
Incidents · Laccadive Sea	1	54.6	1	41	new / 0
Exercises · Malacca Strait	1	38.2	1	34	5.0× / 0.2
Incidents · Bay of Bengal	1	33	1	47	new / 0
Nav aids · Inner Seas off the West Coast of Scotland	1	32	1	301	0.4× / 2.6
Other · Mediterranean Sea - Eastern Basin	1	31.5	1	41	1.3× / 0.8
Incidents · Tyrrhenian Sea	1	31.3	1	31	5.0× / 0.2
Surveys · Bay of Bengal	1	30.2	1	55	new / 0
Other · Gulf of Mexico	1	25.6	1	25	new / 0
Cable ops · North Atlantic Ocean	1	23.4	1	68	0.1× / 7.6
Incidents · Coral Sea	1	21.8	0	—	0.2× / 5.4
Ordnance · Arabian Sea	1	21.4	1	21	2.5× / 0.4
Cable ops · Indian Ocean	1	20	1	85	1.0× / 1
Nav aids · Sea of Azov	1	19.3	1	19	new / 0
Nav aids · Irish Sea and St. George's Channel	1	15.3	1	15	0.7× / 1.4
Spills · Persian Gulf	1	14	0	—	new / 0
Surveys · North Pacific Ocean	1	13.6	1	13	new / 0
Surveys · Tyrrhenian Sea	1	11.5	1	40	0.6× / 1.8
Cable ops · Gulf of Suez	1	11.4	1	45	2.5× / 0.4
Cable ops · Sea of Azov	1	11.3	1	11	new / 0
Derelicts · Mediterranean Sea - Western Basin	1	10.2	0	—	1.7× / 0.6
Other · North Atlantic Ocean	1	9.5	1	9	0.2× / 5.6
Wrecks · Singapore Strait	1	7.5	1	7	new / 0
Derelicts · Malacca Strait	1	6.9	1	6	new / 0
Derelicts · Mozambique Channel	1	6.9	0	—	new / 0
Exercises · Bay of Biscay	1	6.6	1	6	new / 0
Incidents · Persian Gulf	1	6.5	1	6	2.5× / 0.4
Debris · North Sea	1	6.4	0	—	new / 0
Derelicts · North Pacific Ocean	1	6.3	0	—	1.7× / 0.6
Debris · Celtic Sea	1	6.2	0	—	5.0× / 0.2
Containers · Ionian Sea	1	6.2	0	—	new / 0
Debris · Mediterranean Sea - Western Basin	1	6.1	0	—	2.5× / 0.4
Surveys · Philippine Sea	1	5.6	1	5	1.7× / 0.6
Wrecks · Bay of Bengal	1	5.5	1	5	new / 0
Surveys · North Atlantic Ocean	1	5.4	1	5	0.3× / 3.2
Restricted · South Atlantic Ocean	1	5.4	0	—	new / 0
Ordnance · Gulf of Thailand	1	5	0	—	1.7× / 0.6
Other · South Atlantic Ocean	1	4.4	0	—	2.5× / 0.4
Cable ops · Yellow Sea	1	4.4	1	4	5.0× / 0.2
Other · Celtic Sea	1	3.6	1	3	5.0× / 0.2
Surveys · Ionian Sea	1	3.6	0	—	0.7× / 1.4
Quakes · Indian Ocean	1	3	0	—	0.4× / 2.4
Quakes · Japan Sea	1	3	0	—	new / 0
Quakes · North Atlantic Ocean	1	3	0	—	1.3× / 0.8
Quakes · Tyrrhenian Sea	1	3	0	—	new / 0
Icebergs · Indian Ocean	1	2.9	1	2	2.5× / 0.4
Surveys · Irish Sea and St. George's Channel	1	2.7	0	—	0.7× / 1.4
Incidents · Mediterranean Sea - Western Basin	1	2.6	0	—	new / 0
Exercises · Adriatic Sea	1	2.2	0	—	0.3× / 3.6
Ordnance · North Pacific Ocean	1	2.1	0	—	1.0× / 1
Incidents · Great Australian Bight	1	2	1	2	2.5× / 0.4
Exercises · Andaman or Burma Sea	1	1.9	0	—	5.0× / 0.2
Ordnance · Mediterranean Sea - Western Basin	1	1.6	0	—	new / 0
Structures · Bass Strait	1	1.4	0	—	new / 0
Other · English Channel	1	1.4	0	—	1.7× / 0.6
Wrecks · South Pacific Ocean	1	1.1	1	1	2.5× / 0.4
Derelicts · Mediterranean Sea - Eastern Basin	1	1	0	—	1.7× / 0.6
Exercises · South Pacific Ocean	1	1	1	0	0.8× / 1.2
Restricted · Persian Gulf	1	0.9	0	—	new / 0
Ordnance · South Pacific Ocean	1	0.4	0	—	new / 0
Exercises · Bering Sea	1	0.2	0	—	new / 0
Nav aids · Gulf of Mexico	1	0.2	0	—	2.5× / 0.4
Incidents · Tasman Sea	1	0.1	0	—	0.7× / 1.4
Exercises · Aegean Sea	0	217	7	153	0.0× / 3.6
Surveys · Baffin Bay	0	155	5	242	— / 0
Wrecks · North Sealong running	0	107.5	3	507	0.0× / 0.4
Surveys · Beaufort Sea	0	93	3	144	— / 0
Other · Persian Gulflong running	0	93	3	482	0.0× / 0.8
Other · Black Sealong running	0	62	2	446	0.0× / 0.2
Exercises · Ionian Sea	0	62	2	153	0.0× / 1.4
Wrecks · Persian Gulf	0	62	2	87	— / 0
Nav aids · Coral Sea	0	31.5	1	192	0.0× / 0.8
Wrecks · Arabian Sea	0	31	1	96	0.0× / 0.4
Incidents · Arafura Sea	0	31	1	35	0.0× / 0.6
Surveys · Arctic Ocean	0	31	1	144	— / 0
Surveys · Balearic (Iberian Sea)	0	31	1	312	— / 0
Wrecks · Bass Strait	0	31	1	31	— / 0
Surveys · Black Sea	0	31	1	36	— / 0
Towing · Black Sea	0	31	1	42	0.0× / 0.2
Derelicts · Celtic Sea	0	31	1	37	0.0× / 0.2
Surveys · Eastern China Sea	0	31	1	41	— / 0
Wrecks · English Channellong running	0	31	1	956	— / 0
Surveys · Greenland Sealong running	0	31	1	460	— / 0
Exercises · Indian Ocean	0	31	1	60	0.0× / 0.6
Restricted · Indian Ocean	0	31	1	356	— / 0
Nav aids · Ionian Sea	0	31	1	189	— / 0
Wrecks · Kattegatlong running	0	31	1	1,197	— / 0
Nav aids · Mediterranean Sea - Eastern Basin	0	31	1	65	— / 0
Nav aids · Mediterranean Sea - Western Basin	0	31	1	36	0.0× / 1.4
Surveys · North Sea	0	31	1	45	0.0× / 4.6
Cable ops · Philippine Sea	0	31	1	81	0.0× / 0.6
Volcanic · Philippine Sea	0	31	1	31	0.0× / 0.4
Nav aids · Red Sealong running	0	31	1	538	0.0× / 0.2
Nav aids · Savu Sealong running	0	31	1	818	— / 0
Nav aids · South China Sea	0	31	1	348	— / 0
Nav aids · Southern Ocean	0	31	1	31	— / 0
Wrecks · Sulu Sea	0	31	1	325	— / 0
Surveys · Tasman Sea	0	30.8	0	—	— / 0
Other · Japan Sea	0	30.6	0	—	0.0× / 1.2
Other · Yellow Sea	0	30.6	0	—	0.0× / 0.4
Nav aids · Caribbean Sea	0	28.9	0	—	0.0× / 0.4
Incidents · Japan Sea	0	28.5	0	—	0.0× / 0.4
Cable ops · Eastern China Sea	0	25	0	—	0.0× / 3
Exercises · Red Sea	0	22.3	0	—	0.0× / 0.8
Wrecks · Japan Sea	0	21.4	0	—	— / 0
Cable ops · Persian Gulf	0	19	0	—	0.0× / 1.4
Incidents · Andaman or Burma Sea	0	14.5	0	—	0.0× / 0.2
Incidents · North Sea	0	14.5	0	—	— / 0
Cable ops · Aegean Sea	0	13	0	—	0.0× / 0.2
Nav aids · Gulf of Suez	0	7.5	0	—	0.0× / 0.6
Nav aids · Celtic Sea	0	5.9	0	—	0.0× / 3.6
Icebergs · South Atlantic Ocean	0	4	0	—	0.0× / 1.4
Incidents · Caribbean Sea	0	2	0	—	— / 0
Nav aids · Tasman Sea	0	0.5	0	—	0.0× / 1
Wrecks · Gulf of Mexico	0	0.4	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2004-05, 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.