Sea Ledger, March 2013

2013-03-01 to 2013-03-31 · archive

issued: 498
warning-days in force: 7,833
in force at month end: 231
sea × type cells: 201

baseline: same month, previous 5 years (2012-03, 2011-03, 2010-03, 2009-03, 2008-03)

By type

type	issued	warning-days	in force at end
Incidents	102	675.6	14
Exercises	100	909	18
Cable ops	79	978.5	33
Nav aids	71	2,049.7	68
Icebergs	42	71	1
Quakes	26	82.5	2
Derelicts	16	74.5	5
Missiles	14	145.4	4
Other	13	333.4	9
Surveys	9	1,201.8	37
Spills	6	176	2
Wrecks	5	738.7	23
Debris	5	13.5	1
Containers	5	15	0
Piracy	3	12.6	2
Structures	1	31.6	1
Ordnance	1	36.7	2
Volcanic	0	39.5	1
Restricted	0	186	6
War risk	0	62	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 Oceansurge	63	241.6	7	37	2.4× / 26.8
Incidents · North Pacific Ocean	20	78.4	1	56	1.7× / 12
Icebergs · Labrador Seasurge	19	21.7	0	—	4.3× / 4.4
Nav aids · North Sea	16	366.2	14	268	1.9× / 8.2
Exercises · North Pacific Ocean	16	78.6	1	35	1.4× / 11.4
Exercises · Bay of Bengal	15	129.9	2	35	1.9× / 7.8
Incidents · Indian Oceansurge	15	57.7	1	37	3.1× / 4.8
Incidents · South China Seasurge	12	64.2	0	—	2.4× / 5
Exercises · North Atlantic Ocean	12	61	1	60	1.9× / 6.2
Incidents · North Atlantic Ocean	11	95.1	2	76	1.8× / 6
Nav aids · Inner Seas off the West Coast of Scotlandsurge	11	72.9	2	113	3.4× / 3.2
Exercises · South Atlantic Ocean	10	77.6	0	—	1.3× / 7.6
Icebergs · Gulf of St. Lawrencesurge	10	10.9	0	—	4.2× / 2.4
Nav aids · English Channelsurge	8	116.8	3	360	2.7× / 3
Exercises · Mediterranean Sea - Eastern Basinsurge	8	37.8	1	74	4.4× / 1.8
Icebergs · South Atlantic Oceansurge	8	24	0	—	3.6× / 2.2
Nav aids · South Atlantic Oceanlong running	7	458.2	13	1,684	1.4× / 5
Quakes · North Pacific Ocean	7	23.6	0	—	0.1× / 45.6
Quakes · South Pacific Ocean	7	21.8	0	—	0.5× / 13
Derelicts · Indian Oceansurge	7	17	3	30	2.5× / 2.8
Incidents · Caribbean Seasurge	6	76.1	2	40	3.8× / 1.6
Exercises · Arabian Sea	6	55.1	1	32	1.0× / 5.8
Exercises · Black Seasurge	6	35.6	0	—	3.3× / 1.8
Incidents · Coral Sea	6	3.1	0	—	1.3× / 4.6
Incidents · South Pacific Ocean	5	83.6	2	49	0.9× / 5.4
Nav aids · Coral Sea	5	43.3	1	49	0.9× / 5.4
Incidents · Mediterranean Sea - Eastern Basinsurge	5	26.5	2	22	2.1× / 2.4
Icebergs · Indian Oceannew	5	14.4	1	10	new / 0
Nav aids · North Atlantic Ocean	4	187.2	7	183	1.8× / 2.2
Spills · Gulf of Mexico	4	100	0	—	0.9× / 4.2
Missiles · North Pacific Ocean	4	43.3	2	58	0.7× / 5.8
Exercises · Yellow Sea	4	35.3	1	32	0.7× / 6
Exercises · Coral Seasurge	4	21.4	0	—	3.3× / 1.2
Quakes · Solomon Seasurge	4	12	0	—	5.0× / 0.8
Cable ops · North Atlantic Ocean	3	80.6	3	148	0.6× / 5.4
Cable ops · Tasman Seasurge	3	62	2	82	5.0× / 0.6
Incidents · Adriatic Seasurge	3	28.2	0	—	15× / 0.2
Incidents · Mozambique Channelsurge	3	19.8	0	—	3.8× / 0.8
Derelicts · North Atlantic Ocean	3	12.6	0	—	1.7× / 1.8
Exercises · South Pacific Ocean	3	11.1	0	—	0.9× / 3.2
Exercises · Baltic Sea	3	10.5	2	9	1.0× / 3
Quakes · Philippine Sea	3	7.9	1	24	1.1× / 2.8
Incidents · Davis Straitsurge	3	7.6	0	—	15× / 0.2
Debris · Indian Oceansurge	3	7.6	0	—	7.5× / 0.4
Nav aids · South Pacific Oceansurge	3	6.6	0	—	5.0× / 0.6
Nav aids · Arafura Seasurge	3	6.3	1	25	2.5× / 1.2
Other · Indian Oceansurge	3	0.5	0	—	15× / 0.2
Other · North Sea	2	93.1	3	200	1.7× / 1.2
Exercises · South China Sea	2	65.5	2	33	1.3× / 1.6
Nav aids · Gulf of Mexicolong running	2	62.8	3	509	1.1× / 1.8
Other · North Atlantic Ocean	2	47.8	1	223	3.3× / 0.6
Nav aids · Irish Sea and St. George's Channel	2	46.9	2	193	0.8× / 2.6
Exercises · Philippine Sea	2	45.9	0	—	0.6× / 3.6
Nav aids · Mediterranean Sea - Western Basin	2	43.8	2	27	2.0× / 1
Other · Mediterranean Sea - Western Basin	2	34.7	1	44	10× / 0.2
Incidents · Bay of Bengal	2	20.1	1	37	3.3× / 0.6
Missiles · South Atlantic Ocean	2	19.8	0	—	5.0× / 0.4
Surveys · Aegean Seanew	2	19.4	1	19	new / 0
Missiles · North Atlantic Ocean	2	13.7	0	—	0.7× / 3
Missiles · Barentsz Sea	2	12.3	1	15	2.0× / 1
Incidents · Philippine Sea	2	12.3	0	—	1.0× / 2
Containers · Great Australian Bightnew	2	6	0	—	new / 0
Debris · North Atlantic Ocean	2	5.9	1	13	5.0× / 0.4
Cable ops · Norwegian Seanew	2	4.3	2	2	new / 0
Exercises · Bering Sea	2	4	0	—	5.0× / 0.4
Incidents · South Atlantic Ocean	2	1.7	0	—	0.3× / 6
Nav aids · Gulf of Alaska	2	1.4	0	—	0.7× / 2.8
Surveys · South Atlantic Ocean	1	253.3	8	90	0.2× / 4.2
Cable ops · Bay of Bengal	1	123.5	4	151	0.4× / 2.6
Exercises · Aegean Sea	1	92.7	3	88	2.5× / 0.4
Nav aids · Sea of Okhotsklong running	1	92.6	3	467	new / 0
Nav aids · North Pacific Oceanlong running	1	81.7	2	686	0.4× / 2.8
Cable ops · Arabian Sea	1	67.5	3	97	0.5× / 2
Exercises · Ionian Sea	1	58.8	1	88	new / 0
Cable ops · Arafura Sea	1	49	1	48	new / 0
Nav aids · Caribbean Sea	1	47.3	1	128	2.5× / 0.4
Cable ops · North Sea	1	43.2	2	63	0.8× / 1.2
Surveys · Arabian Sea	1	40.5	2	87	1.0× / 1
Incidents · Gulf of Mexico	1	40.4	1	31	1.7× / 0.6
Wrecks · English Channel	1	39.5	1	76	new / 0
Cable ops · South China Sea	1	39	1	99	0.4× / 2.4
Wrecks · Arabian Sea	1	36.5	2	97	new / 0
Surveys · Mediterranean Sea - Eastern Basin	1	34.6	1	121	0.6× / 1.6
Nav aids · Celtic Sea	1	33.4	1	177	0.5× / 2
Other · South Atlantic Ocean	1	32.2	1	45	0.6× / 1.8
Nav aids · Andaman or Burma Sea	1	31.7	2	59	new / 0
Cable ops · Black Sea	1	31	1	148	2.5× / 0.4
Surveys · Indian Ocean	1	30.9	1	30	5.0× / 0.2
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	27	0	—	1.3× / 0.8
Other · Andaman or Burma Sea	1	23.4	1	23	new / 0
Surveys · Gulf of Mexico	1	22.2	1	22	1.3× / 0.8
Wrecks · North Sea	1	20.2	1	20	new / 0
Spills · North Pacific Ocean	1	18	1	32	1.0× / 1
Cable ops · Mediterranean Sea - Western Basin	1	16.4	1	16	2.5× / 0.4
Exercises · Persian Gulf	1	14	0	—	5.0× / 0.2
Surveys · North Sea	1	9.8	0	—	1.0× / 1
Surveys · Arafura Sea	1	9	0	—	new / 0
Exercises · Indian Ocean	1	8	1	8	new / 0
Quakes · Coral Sea	1	7.9	0	—	0.7× / 1.4
Missiles · Bay of Bengal	1	7.5	0	—	0.7× / 1.4
Missiles · Arctic Ocean	1	7.3	0	—	5.0× / 0.2
Wrecks · Coral Sea	1	6.8	1	6	5.0× / 0.2
Piracy · Arabian Sea	1	6.6	1	37	0.1× / 15.8
Incidents · Bismarck Sea	1	6.6	0	—	2.5× / 0.4
Missiles · Arabian Sea	1	5.8	0	—	new / 0
Other · Persian Gulf	1	5.4	0	—	5.0× / 0.2
Missiles · Laccadive Sea	1	4.7	0	—	new / 0
Ordnance · Mediterranean Sea - Western Basin	1	4.4	1	4	new / 0
Exercises · Sulu Sea	1	4	0	—	5.0× / 0.2
Incidents · Java Sea	1	3.5	0	—	new / 0
Incidents · Bass Strait	1	3	0	—	2.5× / 0.4
Quakes · Bering Sea	1	3	0	—	1.0× / 1
Derelicts · Gulf of Aden	1	3	0	—	new / 0
Derelicts · Laccadive Sea	1	3	0	—	5.0× / 0.2
Containers · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Containers · North Atlantic Ocean	1	3	0	—	1.3× / 0.8
Derelicts · North Pacific Ocean	1	3	0	—	0.7× / 1.4
Derelicts · Persian Gulf	1	3	0	—	2.5× / 0.4
Quakes · Savu Sea	1	3	0	—	new / 0
Quakes · South Atlantic Ocean	1	3	0	—	1.3× / 0.8
Containers · South Pacific Ocean	1	3	0	—	5.0× / 0.2
Incidents · Great Australian Bight	1	2.7	0	—	5.0× / 0.2
Piracy · Gulf of Guinea	1	2.4	1	36	5.0× / 0.2
Piracy · Laccadive Sea	1	2.1	0	—	new / 0
Wrecks · Java Sea	1	2	0	—	new / 0
Derelicts · Arabian Sea	1	1.8	1	1	1.7× / 0.6
Exercises · Andaman or Burma Sea	1	1.5	1	1	1.0× / 1
Incidents · English Channel	1	1.3	0	—	new / 0
Exercises · Alboran Sea	1	1.2	0	—	new / 0
Incidents · Ionian Sea	1	1.2	1	1	1.7× / 0.6
Other · Philippine Sea	1	0.8	0	—	5.0× / 0.2
Cable ops · Coral Sea	1	0.6	1	0	new / 0
Structures · South Atlantic Ocean	1	0.6	0	—	new / 0
Quakes · Southern Ocean	1	0.3	1	0	5.0× / 0.2
Derelicts · Celtic Sea	1	0.1	0	—	5.0× / 0.2
Nav aids · Tasman Sea	1	0.1	0	—	1.3× / 0.8
Surveys · Arctic Oceanlong running	0	248	8	888	— / 0
Surveys · Beaufort Sealong running	0	186	6	963	— / 0
Wrecks · South Atlantic Oceanlong running	0	155	5	1,054	0.0× / 0.2
Nav aids · Arabian Sealong running	0	93	3	660	0.0× / 0.2
Wrecks · Persian Gulf	0	93	3	208	— / 0
Surveys · Andaman or Burma Sea	0	62	2	89	0.0× / 0.4
Restricted · Black Sea	0	62	2	227	— / 0
Nav aids · Kara Sealong running	0	62	2	571	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	676	— / 0
Other · North Pacific Ocean	0	62	2	349	0.0× / 1.2
Restricted · North Sealong running	0	62	2	587	0.0× / 0.4
Cable ops · Persian Gulf	0	62	2	67	0.0× / 1.2
Nav aids · South China Sealong running	0	62	2	594	0.0× / 0.2
Surveys · The Northwestern Passages	0	62	2	237	— / 0
Wrecks · The Northwestern Passageslong running	0	62	2	938	— / 0
Exercises · Laccadive Sea	0	59.5	1	35	0.0× / 3.2
Cable ops · Mediterranean Sea - Eastern Basin	0	36	1	40	0.0× / 1.6
Incidents · Tyrrhenian Sealong running	0	32.5	1	441	— / 0
Ordnance · North Sealong running	0	32.3	1	494	0.0× / 0.2
Missiles · Aegean Sea	0	31	1	88	— / 0
Cable ops · Andaman or Burma Sea	0	31	1	118	0.0× / 0.2
Wrecks · Andaman or Burma Sea	0	31	1	68	— / 0
Wrecks · Baltic Sea	0	31	1	72	— / 0
Surveys · Bering Sea	0	31	1	244	— / 0
Surveys · Chukchi Sea	0	31	1	118	— / 0
Nav aids · Eastern China Sealong running	0	31	1	411	— / 0
Nav aids · Indian Ocean	0	31	1	57	0.0× / 1.6
Wrecks · Indian Ocean	0	31	1	102	— / 0
Wrecks · Irish Sea and St. George's Channel	0	31	1	283	— / 0
Wrecks · Mediterranean Sea - Eastern Basin	0	31	1	55	— / 0
Cable ops · Mozambique Channel	0	31	1	41	0.0× / 1
Surveys · Mozambique Channel	0	31	1	115	— / 0
Restricted · North Atlantic Ocean	0	31	1	93	0.0× / 0.6
Wrecks · North Atlantic Oceanlong running	0	31	1	540	— / 0
Surveys · North Pacific Ocean	0	31	1	240	0.0× / 0.6
Structures · North Sealong running	0	31	1	594	— / 0
Nav aids · Persian Gulf	0	31	1	156	— / 0
Volcanic · Philippine Sea	0	31	1	336	— / 0
Wrecks · Red Sea	0	31	1	67	— / 0
Restricted · Sea of Okhotsklong running	0	31	1	535	— / 0
Spills · South Atlantic Oceanlong running	0	31	1	506	— / 0
Derelicts · South Pacific Ocean	0	31	1	277	0.0× / 0.8
Nav aids · Southern Ocean	0	31	1	44	— / 0
Surveys · Sulu Sea	0	31	1	72	— / 0
Wrecks · Yellow Sealong running	0	31	1	468	— / 0
Wrecks · South China Sea	0	30.9	0	—	— / 0
Cable ops · Gulf of Mexico	0	29.4	0	—	0.0× / 1.4
Other · South China Sea	0	28.5	0	—	0.0× / 0.2
Surveys · Sea of Marmara	0	24	0	—	0.0× / 0.2
Wrecks · North Pacific Ocean	0	22.4	0	—	0.0× / 0.2
Wrecks · Philippine Sea	0	22.4	0	—	— / 0
Surveys · North Atlantic Ocean	0	19.7	0	—	0.0× / 0.4
Cable ops · Irish Sea and St. George's Channel	0	18.4	0	—	— / 0
Surveys · Mediterranean Sea - Western Basin	0	17	0	—	— / 0
Cable ops · Philippine Sea	0	12	0	—	0.0× / 0.8
Nav aids · Bristol Channel	0	9.5	0	—	0.0× / 0.6
Incidents · Gulf of Thailand	0	8.5	0	—	— / 0
Volcanic · South Pacific Ocean	0	8.5	0	—	0.0× / 0.2
Surveys · Tasman Sea	0	6.9	0	—	— / 0
Other · Arabian Sea	0	5	0	—	— / 0
Surveys · Gulf of California	0	1.5	0	—	— / 0
Incidents · Gulf of Guinea	0	1.5	0	—	— / 0
Piracy · Indian Ocean	0	1.5	0	—	0.0× / 9
Cable ops · Eastern China Sea	0	0	0	—	0.0× / 1

Cite: seahazards.com Sea Ledger, 2013-03, 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.