Sea Ledger, April 2003

2003-04-01 to 2003-04-30 · archive

issued: 322
warning-days in force: 5,143
in force at month end: 154
sea × type cells: 174

baseline: same month, previous 5 years (2002-04, 2001-04, 2000-04, 1999-04, 1998-04)

By type

type	issued	warning-days	in force at end
Exercises	74	496.9	16
Cable ops	63	517.5	19
Incidents	54	854.8	19
Nav aids	30	1,233.6	38
Quakes	28	83.2	4
Other	14	473.7	17
Icebergs	11	58.5	0
Derelicts	10	64.3	1
Surveys	9	397.6	12
Spills	8	93	4
Ordnance	7	102.3	3
Missiles	5	60	2
Wrecks	4	520.5	17
Restricted	2	89.6	0
Debris	2	12.5	0
Containers	1	6.4	0
War risk	0	60	2
Mines	0	0	0
Towing	0	19	0

By sea and type · 174 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	47	117.4	4	32	1.6× / 29.2
Exercises · North Atlantic Oceansurge	21	101.7	1	35	2.6× / 8.2
Exercises · Black Seasurge	10	67.1	0	—	2.9× / 3.4
Quakes · South Pacific Ocean	9	27	0	—	1.0× / 9.2
Incidents · North Atlantic Ocean	8	54.5	3	72	1.8× / 4.4
Exercises · Laccadive Seasurge	8	41.8	2	33	4.4× / 1.8
Exercises · Bay of Bengalsurge	6	19.4	2	29	2.1× / 2.8
Incidents · Indian Ocean	5	141.6	1	51	1.6× / 3.2
Spills · Gulf of Mexico	5	62	1	23	1.9× / 2.6
Missiles · North Pacific Ocean	5	60	2	34	1.3× / 4
Cable ops · Mediterranean Sea - Eastern Basinsurge	5	41.7	1	28	4.2× / 1.2
Ordnance · North Pacific Oceansurgelong running	5	33.2	1	566	25× / 0.2
Incidents · North Pacific Ocean	4	179.3	3	70	0.7× / 6
Exercises · Mediterranean Sea - Eastern Basin	4	67.9	3	30	1.8× / 2.2
Incidents · South Pacific Ocean	4	59.3	0	—	0.9× / 4.6
Incidents · South Atlantic Ocean	4	45.4	2	30	1.1× / 3.8
Incidents · Mediterranean Sea - Western Basinsurge	4	38.9	1	61	20× / 0.2
Incidents · Mediterranean Sea - Eastern Basinsurge	4	35.2	0	—	3.3× / 1.2
Icebergs · South Atlantic Oceansurge	4	22.9	0	—	2.2× / 1.8
Icebergs · Southern Oceansurge	4	22.9	0	—	3.3× / 1.2
Exercises · Arabian Sea	4	13.7	0	—	1.5× / 2.6
Quakes · North Pacific Ocean	4	10.4	1	23	0.8× / 5
Incidents · Philippine Sea	3	94.1	2	69	0.7× / 4.2
Incidents · South China Seasurge	3	81.6	3	70	2.1× / 1.4
Nav aids · Gulf of Sueznew	3	75.3	3	27	new / 0
Nav aids · North Atlantic Ocean	3	52.1	2	131	0.9× / 3.4
Nav aids · North Sea	3	39.3	1	79	0.5× / 6.2
Other · Persian Gulfsurge	3	39.3	4	85	3.8× / 0.8
Exercises · Tyrrhenian Sea	3	36.5	1	33	1.7× / 1.8
Spills · North Atlantic Ocean	3	31	3	14	1.7× / 1.8
Nav aids · Celtic Sea	3	20.8	3	19	1.7× / 1.8
Incidents · Coral Sea	3	19.6	0	—	1.3× / 2.4
Exercises · Mediterranean Sea - Western Basin	3	17.7	1	33	1.3× / 2.4
Cable ops · Gulf of Guineasurge	3	14.8	1	14	15× / 0.2
Exercises · North Pacific Ocean	3	14.8	0	—	0.6× / 5
Quakes · Indian Ocean	3	6.1	2	19	1.4× / 2.2
Derelicts · South Atlantic Oceansurge	3	2.3	0	—	7.5× / 0.4
Nav aids · Inner Seas off the West Coast of Scotland	3	1.4	0	—	1.1× / 2.6
Incidents · Celtic Seasurge	3	0.5	0	—	3.0× / 1
Cable ops · North Atlantic Ocean	2	99.7	4	221	0.2× / 10.2
Surveys · English Channel	2	76.2	2	43	0.5× / 4.2
Other · Japan Sea	2	67.1	2	34	2.5× / 0.8
Wrecks · Persian Gulf	2	57.9	1	33	5.0× / 0.4
Nav aids · Arabian Sea	2	56.1	1	118	3.3× / 0.6
Nav aids · Tyrrhenian Sea	2	37.2	1	49	1.1× / 1.8
Cable ops · Tyrrhenian Seanew	2	20.3	1	36	new / 0
Other · North Pacific Ocean	2	12.2	0	—	2.0× / 1
Icebergs · Barentsz Seanew	2	11.7	0	—	new / 0
Incidents · Solomon Sea	2	10.8	1	14	5.0× / 0.4
Exercises · Japan Sea	2	10.2	0	—	2.0× / 1
Exercises · Andaman or Burma Seanew	2	10	1	6	new / 0
Exercises · South Atlantic Ocean	2	10	1	8	2.0× / 1
Exercises · Ionian Sea	2	8	1	18	2.5× / 0.8
Nav aids · Gulf of Mexico	2	5.1	0	—	2.5× / 0.8
Quakes · Coral Sea	2	4.2	1	25	1.0× / 2
Derelicts · English Channelnew	2	0.7	0	—	new / 0
Nav aids · Persian Gulflong running	1	98.8	3	512	0.5× / 2
Nav aids · Mediterranean Sea - Western Basin	1	86.5	3	188	1.3× / 0.8
Nav aids · South Atlantic Ocean	1	63.7	2	299	0.2× / 4.4
Nav aids · Red Sea	1	45.1	2	141	new / 0
Nav aids · English Channel	1	45	1	114	0.3× / 3
Derelicts · North Atlantic Ocean	1	36.3	1	209	1.3× / 0.8
Surveys · North Sea	1	36.2	1	124	0.3× / 3.8
Nav aids · Irish Sea and St. George's Channellong running	1	31.6	1	1,092	1.0× / 1
Other · North Atlantic Ocean	1	31	1	58	0.3× / 3.2
Wrecks · English Channellong running	1	30.6	1	559	new / 0
Other · Black Sea	1	30.3	2	49	new / 0
Surveys · Black Sea	1	30	1	56	new / 0
Other · Sea of Marmara	1	30	1	45	new / 0
Incidents · Tasman Sea	1	28.1	1	52	1.3× / 0.8
Incidents · Arabian Sea	1	25.9	1	25	5.0× / 0.2
Cable ops · Gulf of Suez	1	22.6	1	62	new / 0
Other · North Sea	1	21.4	0	—	0.6× / 1.8
Incidents · Mozambique Channel	1	16.4	1	16	new / 0
Surveys · Mediterranean Sea - Eastern Basin	1	14.5	1	71	1.3× / 0.8
Restricted · Japan Sea	1	12.3	0	—	new / 0
Derelicts · Persian Gulf	1	12	0	—	new / 0
Surveys · Persian Gulf	1	11.5	1	11	2.5× / 0.4
Cable ops · Indian Ocean	1	7.7	1	50	2.5× / 0.4
Nav aids · Laccadive Sea	1	7.4	1	7	1.7× / 0.6
Derelicts · Arafura Sea	1	6.9	0	—	5.0× / 0.2
Incidents · Eastern China Sea	1	6.7	0	—	2.5× / 0.4
Surveys · North Atlantic Ocean	1	6.6	1	6	0.4× / 2.8
Surveys · Bay of Bengal	1	6.4	0	—	new / 0
Debris · English Channel	1	6.4	0	—	5.0× / 0.2
Containers · Persian Gulf	1	6.4	0	—	new / 0
Other · Indian Ocean	1	6.2	0	—	2.5× / 0.4
Debris · North Pacific Ocean	1	6.1	0	—	new / 0
Quakes · Solomon Sea	1	5	0	—	0.5× / 2.2
Nav aids · Timor Sea	1	4.9	0	—	new / 0
Cable ops · Bass Strait	1	4.8	1	4	5.0× / 0.2
Ordnance · Malacca Strait	1	4.6	0	—	new / 0
Exercises · Malacca Strait	1	4.5	1	4	5.0× / 0.2
Ordnance · Philippine Sea	1	4.5	0	—	5.0× / 0.2
Cable ops · English Channel	1	4.3	0	—	0.3× / 3.2
Exercises · Red Sea	1	4.3	0	—	5.0× / 0.2
Restricted · Alboran Sea	1	3.7	0	—	new / 0
Wrecks · Southern Ocean	1	3.4	1	3	new / 0
Surveys · Caribbean Sea	1	3.2	0	—	new / 0
Exercises · South Pacific Ocean	1	3.2	0	—	0.7× / 1.4
Quakes · Aegean Sea	1	3	0	—	new / 0
Quakes · Arafura Sea	1	3	0	—	new / 0
Quakes · Bering Sea	1	3	0	—	5.0× / 0.2
Quakes · Bismarck Sea	1	3	0	—	1.3× / 0.8
Quakes · Gulf of California	1	3	0	—	new / 0
Quakes · Molukka Sea	1	3	0	—	5.0× / 0.2
Quakes · North Atlantic Ocean	1	3	0	—	2.5× / 0.4
Quakes · South Atlantic Ocean	1	3	0	—	1.0× / 1
Quakes · South China Sea	1	3	0	—	5.0× / 0.2
Derelicts · South Pacific Ocean	1	2.9	0	—	2.5× / 0.4
Other · Celtic Sea	1	1.2	1	1	2.5× / 0.4
Nav aids · Bass Strait	1	1	0	—	1.3× / 0.8
Icebergs · North Atlantic Ocean	1	1	0	—	1.3× / 0.8
Exercises · South China Sea	1	1	0	—	5.0× / 0.2
Incidents · Arafura Sea	1	0.5	0	—	5.0× / 0.2
Other · Great Australian Bight	1	0.5	0	—	new / 0
Incidents · English Channel	1	0.2	0	—	new / 0
Incidents · Great Australian Bight	1	0.2	0	—	1.7× / 0.6
Derelicts · Tasman Sea	1	0.2	0	—	new / 0
Cable ops · Bay of Bengal	0	90	3	71	0.0× / 0.2
Surveys · Greenland Sea	0	90	3	63	— / 0
Wrecks · North Sealong running	0	90	3	678	— / 0
Nav aids · Solomon Sealong running	0	90	3	430	0.0× / 0.2
Nav aids · South Pacific Ocean	0	90	3	209	0.0× / 1.6
Restricted · Mediterranean Sea - Eastern Basin	0	73.6	0	—	— / 0
Cable ops · Arabian Sea	0	73	2	105	0.0× / 1
Exercises · Aegean Sea	0	61.7	2	120	0.0× / 2
Wrecks · Baltic Sealong running	0	60	2	852	— / 0
Nav aids · Coral Sealong running	0	60	2	1,105	0.0× / 3.2
Wrecks · North Atlantic Ocean	0	60	2	146	— / 0
War risk · Persian Gulflong running	0	60	2	453	— / 0
Wrecks · South China Sealong running	0	60	2	580	— / 0
Nav aids · Bay of Bengal	0	57.3	0	—	— / 0
Nav aids · Mozambique Channel	0	56.9	0	—	0.0× / 0.4
Surveys · Mediterranean Sea - Western Basinlong running	0	47	1	372	0.0× / 0.6
Surveys · Arabian Sea	0	30	1	61	— / 0
Wrecks · Arabian Sea	0	30	1	140	— / 0
Other · Bass Straitlong running	0	30	1	390	0.0× / 0.4
Nav aids · Bay of Biscay	0	30	1	36	— / 0
Nav aids · Eastern China Sealong running	0	30	1	919	— / 0
Other · Greenland Sealong running	0	30	1	980	— / 0
Ordnance · Indian Oceanlong running	0	30	1	454	— / 0
Nav aids · Ionian Sea	0	30	1	109	0.0× / 0.2
Wrecks · Japan Sea	0	30	1	91	— / 0
Wrecks · Kattegatlong running	0	30	1	800	0.0× / 0.2
Other · Laccadive Sea	0	30	1	156	— / 0
Ordnance · Ligurian Sealong running	0	30	1	437	— / 0
Nav aids · Malacca Strait	0	30	1	86	0.0× / 0.2
Other · Malacca Strait	0	30	1	216	— / 0
Wrecks · Malacca Strait	0	30	1	58	0.0× / 0.2
Nav aids · Savu Sealong running	0	30	1	421	— / 0
Other · Sea of Okhotsk	0	30	1	48	— / 0
Wrecks · Skagerraklong running	0	30	1	903	— / 0
Nav aids · Southern Ocean	0	30	1	102	— / 0
Other · Tyrrhenian Sea	0	30	1	110	0.0× / 0.2
Other · Yellow Sea	0	29.5	0	—	0.0× / 0.4
Nav aids · Great Australian Bight	0	28.1	0	—	0.0× / 0.2
Other · Gulf of Aqaba	0	25	0	—	— / 0
Towing · North Atlantic Ocean	0	19	0	—	— / 0
Surveys · Gulf of Guinea	0	15	0	—	— / 0
Surveys · Adriatic Sea	0	14.5	0	—	0.0× / 0.4
Surveys · Gulf of Oman	0	11.5	0	—	— / 0
Incidents · Red Sea	0	11.5	0	—	— / 0
Cable ops · South China Sea	0	11	0	—	0.0× / 1.4
Cable ops · Celtic Sea	0	9.8	0	—	0.0× / 5.2
Wrecks · Tyrrhenian Sea	0	8.6	0	—	— / 0
Surveys · Indian Ocean	0	5	0	—	0.0× / 0.2
Incidents · Gulf of Guinea	0	4.5	0	—	— / 0
Exercises · Gulf of Mexico	0	3.4	0	—	— / 0
Derelicts · Gulf of Mexico	0	3	0	—	0.0× / 0.6
Quakes · Banda Sea	0	2.8	0	—	0.0× / 0.6
Quakes · Adriatic Sea	0	0.7	0	—	0.0× / 0.2
Cable ops · Ionian Sea	0	0.4	0	—	— / 0
Mines · Celtic Sea	0	0	0	—	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2003-04, 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.