Sea Ledger, February 2013

2013-02-01 to 2013-02-28 · archive

issued: 512
warning-days in force: 7,529
in force at month end: 260
sea × type cells: 204

baseline: same month, previous 5 years (2012-02, 2011-02, 2010-02, 2009-02, 2008-02)

By type

type	issued	warning-days	in force at end
Incidents	87	634.1	25
Cable ops	84	1,058.3	28
Quakes	83	243.8	4
Nav aids	74	1,929.4	69
Exercises	57	612	24
Icebergs	30	43.5	2
Derelicts	26	116.2	3
Missiles	18	142.4	4
Surveys	11	1,091.4	40
Other	9	341.7	11
Spills	8	70	8
Piracy	7	40.4	4
Debris	6	18	0
Containers	5	15	0
Wrecks	4	807.6	25
Structures	2	30	1
Volcanic	1	40.1	2
Restricted	0	168	6
War risk	0	56	2
Ordnance	0	71.5	2

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Quakes · Coral Seasurge	62	180	2	29	31× / 2
Cable ops · South Atlantic Oceansurge	61	238.8	2	48	2.9× / 21.4
Icebergs · Labrador Seasurge	21	21.9	2	21	4.8× / 4.4
Incidents · South China Seasurge	19	83.2	5	60	3.2× / 6
Incidents · North Pacific Ocean	17	60.1	3	30	1.4× / 12.4
Nav aids · North Sealong running	16	349.2	12	384	1.9× / 8.4
Incidents · North Atlantic Ocean	13	154.1	5	45	1.8× / 7.2
Derelicts · North Atlantic Oceansurge	12	23.8	2	23	5.0× / 2.4
Exercises · North Pacific Ocean	10	51.4	2	32	1.0× / 10
Nav aids · Inner Seas off the West Coast of Scotlandsurge	9	50.4	2	82	6.4× / 1.4
Quakes · South Pacific Ocean	9	28	1	29	0.5× / 19.4
Exercises · Arabian Sea	8	64	2	32	1.7× / 4.8
Exercises · Mediterranean Sea - Eastern Basinsurge	8	54.3	2	43	6.7× / 1.2
Incidents · Indian Oceansurge	8	31.9	2	61	2.5× / 3.2
Incidents · South Pacific Ocean	7	30.5	2	18	1.2× / 6
Nav aids · Bass Straitsurge	7	1.4	0	—	3.5× / 2
Nav aids · South Atlantic Oceansurgelong running	6	482.5	18	1,653	2.0× / 3
Nav aids · Coral Seasurge	6	24.7	1	27	2.1× / 2.8
Exercises · Bay of Bengal	5	65.9	2	52	0.9× / 5.6
Missiles · North Pacific Ocean	5	49.6	1	58	0.8× / 6.2
Exercises · Yellow Sea	5	36.1	1	35	1.0× / 5
Spills · Gulf of Mexico	5	26	5	14	1.3× / 4
Icebergs · South Atlantic Oceansurge	5	15.3	0	—	2.8× / 1.8
Derelicts · Indian Ocean	5	15	0	—	1.7× / 3
Surveys · South Atlantic Ocean	4	218.9	9	59	1.8× / 2.2
Nav aids · North Atlantic Ocean	4	129.5	5	152	0.7× / 5.4
Cable ops · Mediterranean Sea - Eastern Basin	4	47.5	2	38	1.7× / 2.4
Nav aids · Indian Oceansurge	4	35	1	26	3.3× / 1.2
Missiles · North Atlantic Ocean	4	22.7	1	26	1.5× / 2.6
Piracy · Gulf of Guineasurge	4	20.8	1	24	6.7× / 0.6
Containers · Celtic Seasurge	4	12	0	—	10× / 0.4
Quakes · North Pacific Ocean	4	11.8	1	28	0.9× / 4.4
Nav aids · Great Australian Bightsurge	4	6.1	0	—	2.2× / 1.8
Other · North Seasurge	3	100.6	3	169	3.0× / 1
Nav aids · North Pacific Oceanlong running	3	96.1	4	655	1.5× / 2
Incidents · Tyrrhenian Seanewlong running	3	69.7	2	410	new / 0
Incidents · Caribbean Seasurge	3	48.2	1	55	2.1× / 1.4
Exercises · North Atlantic Ocean	3	43.9	2	29	1.7× / 1.8
Cable ops · Philippine Seasurge	3	25.7	1	48	7.5× / 0.4
Exercises · Philippine Sea	3	16.6	1	14	1.5× / 2
Missiles · Bay of Bengalsurge	3	13.9	1	9	3.8× / 0.8
Icebergs · Gulf of St. Lawrencenew	3	3.3	0	—	new / 0
Incidents · Coral Sea	3	0.5	0	—	1.1× / 2.8
Wrecks · South Atlantic Oceanlong running	2	127.6	5	1,023	5.0× / 0.4
Exercises · Aegean Sea	2	93.2	3	57	2.5× / 0.8
Cable ops · North Atlantic Ocean	2	78.7	2	117	0.5× / 4.4
Nav aids · Gulf of Mexicolong running	2	68.4	2	478	0.8× / 2.4
Nav aids · English Channel	2	57.8	2	329	0.6× / 3.4
Exercises · South China Sea	2	57.4	2	32	0.8× / 2.6
Nav aids · Celtic Sea	2	56.1	2	146	0.8× / 2.4
Derelicts · South Pacific Oceannew	2	34	1	246	new / 0
Exercises · Laccadive Sea	2	30.5	2	32	0.7× / 3
Incidents · Japan Sea	2	14.5	0	—	3.3× / 0.6
Missiles · Arabian Sea	2	9.9	0	—	5.0× / 0.4
Incidents · Bay of Bengal	2	9.7	1	13	1.7× / 1.2
Piracy · Arabian Sea	2	9.6	2	6	0.4× / 5.6
Derelicts · Arafura Seanew	2	8.9	0	—	new / 0
Exercises · Black Sea	2	7.2	1	16	3.3× / 0.6
Cable ops · Irish Sea and St. George's Channel	2	6.6	1	6	10× / 0.2
Exercises · South Pacific Ocean	2	6.4	0	—	0.5× / 4.2
Derelicts · Japan Seanew	2	6	0	—	new / 0
Quakes · Solomon Sea	2	6	0	—	1.4× / 1.4
Incidents · Philippine Sea	2	5.3	1	17	1.4× / 1.4
Nav aids · Gulf of Alaska	2	0.3	0	—	0.6× / 3.2
Cable ops · Bay of Bengal	1	99	4	120	0.5× / 2.2
Cable ops · Persian Gulflong running	1	89.2	2	406	1.3× / 0.8
Nav aids · Caribbean Sea	1	49	2	97	2.5× / 0.4
Nav aids · Bristol Channellong running	1	44.2	2	386	1.3× / 0.8
Surveys · Andaman or Burma Sea	1	42.8	2	58	new / 0
Cable ops · Tasman Sea	1	42.8	2	51	5.0× / 0.2
Wrecks · Mediterranean Sea - Eastern Basin	1	39.7	1	57	new / 0
Other · South China Sea	1	38.8	2	33	new / 0
Cable ops · Arabian Sea	1	37.3	2	66	0.4× / 2.6
Cable ops · Gulf of Mexico	1	36.6	1	46	0.8× / 1.2
Surveys · North Atlantic Ocean	1	34	2	40	2.5× / 0.4
Nav aids · Andaman or Burma Sea	1	33	1	28	5.0× / 0.2
Surveys · Sea of Marmara	1	30.5	1	168	new / 0
Cable ops · Mozambique Channel	1	28	1	30	1.3× / 0.8
Other · South Atlantic Ocean	1	28	1	56	0.8× / 1.2
Cable ops · Laccadive Sea	1	23.5	1	23	1.3× / 0.8
Surveys · Ionian Sea	1	21.8	0	—	new / 0
Incidents · Arabian Sea	1	21.4	0	—	0.8× / 1.2
Other · Arabian Sea	1	17.6	1	17	1.7× / 0.6
Cable ops · Arafura Sea	1	17.5	1	17	new / 0
Incidents · South Atlantic Ocean	1	16.1	0	—	0.2× / 5.6
Cable ops · Celtic Sea	1	15.8	0	—	5.0× / 0.2
Incidents · Gulf of Mexico	1	15.7	1	30	1.7× / 0.6
Exercises · South Atlantic Ocean	1	15.7	1	15	0.2× / 4.4
Other · Great Australian Bight	1	15.6	0	—	new / 0
Incidents · Mozambique Channel	1	15.2	0	—	1.0× / 1
Spills · Philippine Sea	1	14	0	—	new / 0
Other · Mediterranean Sea - Western Basin	1	13.3	1	13	5.0× / 0.2
Nav aids · Southern Ocean	1	13.3	1	13	new / 0
Cable ops · Indian Ocean	1	12.8	0	—	1.3× / 0.8
Volcanic · South Pacific Ocean	1	12.1	1	12	5.0× / 0.2
Incidents · Gulf of Thailand	1	11.6	1	11	5.0× / 0.2
Surveys · Tasman Sea	1	11	1	11	5.0× / 0.2
Piracy · Indian Ocean	1	10	1	9	0.8× / 1.2
Other · Laccadive Sea	1	8.4	0	—	new / 0
Incidents · Laccadive Sea	1	7.8	0	—	1.3× / 0.8
Surveys · Philippine Sea	1	6.5	0	—	5.0× / 0.2
Missiles · Arctic Ocean	1	5.9	0	—	5.0× / 0.2
Cable ops · Aegean Sea	1	5.8	0	—	2.5× / 0.4
Incidents · Solomon Sea	1	5.8	0	—	2.5× / 0.4
Nav aids · Arafura Sea	1	5.6	0	—	new / 0
Exercises · Andaman or Burma Sea	1	5.2	0	—	1.3× / 0.8
Exercises · Baltic Sea	1	5.2	0	—	0.6× / 1.8
Missiles · Laccadive Sea	1	5.2	0	—	2.5× / 0.4
Missiles · South Pacific Ocean	1	4.3	0	—	1.3× / 0.8
Cable ops · Bristol Channel	1	4.2	0	—	new / 0
Derelicts · Coral Sea	1	4.1	0	—	1.3× / 0.8
Debris · Arafura Sea	1	3	0	—	new / 0
Debris · Caribbean Sea	1	3	0	—	new / 0
Quakes · Ceram Sea	1	3	0	—	new / 0
Quakes · East Siberian Sea	1	3	0	—	new / 0
Derelicts · Gulf of Aden	1	3	0	—	new / 0
Debris · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Quakes · North Atlantic Ocean	1	3	0	—	1.3× / 0.8
Containers · North Pacific Ocean	1	3	0	—	0.8× / 1.2
Debris · North Pacific Ocean	1	3	0	—	new / 0
Quakes · Philippine Sea	1	3	0	—	0.2× / 5.2
Debris · South Pacific Ocean	1	3	0	—	2.5× / 0.4
Quakes · Southern Ocean	1	3	0	—	1.3× / 0.8
Icebergs · Southern Ocean	1	3	0	—	0.4× / 2.4
Debris · Tasman Sea	1	3	0	—	5.0× / 0.2
Derelicts · Timor Sea	1	3	0	—	5.0× / 0.2
Quakes · Timor Sea	1	3	0	—	new / 0
Missiles · Indian Ocean	1	2.9	0	—	0.8× / 1.2
Exercises · Bering Sea	1	2.4	0	—	2.5× / 0.4
Surveys · Gulf of California	1	2.1	1	2	new / 0
Incidents · Mediterranean Sea - Eastern Basin	1	2.1	0	—	0.7× / 1.4
Nav aids · Ionian Sea	1	2	0	—	new / 0
Nav aids · Tasman Sea	1	1.9	0	—	1.0× / 1
Structures · Mediterranean Sea - Eastern Basin	1	1.8	0	—	new / 0
Spills · North Pacific Ocean	1	1	1	1	0.8× / 1.2
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	1	1	1	1.3× / 0.8
Exercises · Coral Sea	1	0.6	1	30	0.6× / 1.6
Wrecks · South Pacific Ocean	1	0.5	0	—	new / 0
Structures · Indian Ocean	1	0.2	0	—	new / 0
Surveys · Arctic Oceanlong running	0	224	8	857	0.0× / 0.2
Surveys · Beaufort Sealong running	0	168	6	932	— / 0
Nav aids · Arabian Sealong running	0	114.9	3	629	0.0× / 0.2
Wrecks · Persian Gulf	0	84	3	177	— / 0
Cable ops · South China Sea	0	76	2	91	0.0× / 1.4
Ordnance · North Sealong running	0	71.5	2	1,581	0.0× / 0.2
Restricted · Black Sea	0	56	2	196	— / 0
Wrecks · English Channel	0	56	2	45	0.0× / 0.2
Nav aids · Irish Sea and St. George's Channel	0	56	2	162	0.0× / 2.6
Nav aids · Kara Sealong running	0	56	2	540	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	56	2	645	— / 0
Other · North Pacific Ocean	0	56	2	318	0.0× / 0.8
Restricted · North Sealong running	0	56	2	556	— / 0
Nav aids · Sea of Okhotsklong running	0	56	2	436	— / 0
Nav aids · South China Sealong running	0	56	2	563	— / 0
Wrecks · South China Sealong running	0	56	2	385	0.0× / 0.4
Surveys · The Northwestern Passages	0	56	2	206	— / 0
Wrecks · The Northwestern Passageslong running	0	56	2	907	— / 0
Wrecks · Indian Ocean	0	54.5	1	71	— / 0
Cable ops · Andaman or Burma Sea	0	53	1	87	0.0× / 0.4
Surveys · Mediterranean Sea - Western Basin	0	50	1	28	0.0× / 0.2
Wrecks · Arabian Sea	0	47.4	1	66	0.0× / 0.6
Wrecks · North Sea	0	46.4	0	—	— / 0
Other · North Atlantic Ocean	0	43.5	1	192	0.0× / 0.6
Wrecks · North Atlantic Oceanlong running	0	43.5	1	559	— / 0
Surveys · Mediterranean Sea - Eastern Basin	0	42.8	1	90	0.0× / 2.4
Missiles · Aegean Sea	0	28	1	57	— / 0
Wrecks · Andaman or Burma Sea	0	28	1	37	— / 0
Surveys · Arabian Sea	0	28	1	56	0.0× / 0.4
Wrecks · Baltic Sea	0	28	1	41	— / 0
Surveys · Bering Sea	0	28	1	213	— / 0
Cable ops · Black Sea	0	28	1	117	0.0× / 0.2
Surveys · Chukchi Sea	0	28	1	87	— / 0
Cable ops · Eastern China Sea	0	28	1	134	0.0× / 0.8
Nav aids · Eastern China Sealong running	0	28	1	380	0.0× / 0.4
Incidents · Gulf of Guinea	0	28	1	45	0.0× / 0.2
Exercises · Ionian Sea	0	28	1	57	— / 0
Wrecks · Irish Sea and St. George's Channel	0	28	1	252	0.0× / 0.2
Surveys · Mozambique Channel	0	28	1	84	0.0× / 0.2
Restricted · North Atlantic Ocean	0	28	1	62	— / 0
Surveys · North Pacific Ocean	0	28	1	209	— / 0
Wrecks · North Pacific Ocean	0	28	1	38	— / 0
Cable ops · North Sea	0	28	1	32	0.0× / 1
Structures · North Sealong running	0	28	1	563	0.0× / 0.6
Exercises · Persian Gulf	0	28	1	55	— / 0
Nav aids · Persian Gulf	0	28	1	125	— / 0
Volcanic · Philippine Sea	0	28	1	305	0.0× / 0.8
Wrecks · Philippine Sea	0	28	1	290	— / 0
Wrecks · Red Sea	0	28	1	36	— / 0
Restricted · Sea of Okhotsklong running	0	28	1	504	— / 0
Spills · South Atlantic Oceanlong running	0	28	1	475	— / 0
Nav aids · South Pacific Ocean	0	28	1	238	0.0× / 1.8
Surveys · Sulu Sea	0	28	1	41	— / 0
Wrecks · Yellow Sealong running	0	28	1	437	— / 0
Cable ops · Sulu Sea	0	20	0	—	— / 0
Other · Persian Gulf	0	18.6	0	—	0.0× / 0.2
Surveys · Balearic (Iberian Sea)	0	15	0	—	— / 0
Derelicts · Gulf of Oman	0	14.7	0	—	— / 0
Cable ops · Malacca Strait	0	14	0	—	0.0× / 0.2
Derelicts · Solomon Sea	0	2.2	0	—	— / 0
Incidents · Adriatic Sea	0	1.5	0	—	0.0× / 0.4

Cite: seahazards.com Sea Ledger, 2013-02, 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.