Sea Ledger, May 2013

2013-05-01 to 2013-05-31 · archive

issued: 534
warning-days in force: 8,265
in force at month end: 277
sea × type cells: 201

baseline: same month, previous 5 years (2012-05, 2011-05, 2010-05, 2009-05, 2008-05)

By type

type	issued	warning-days	in force at end
Incidents	127	745	30
Exercises	80	774.3	18
Cable ops	73	1,270.5	44
Nav aids	60	1,951.3	71
Quakes	35	108.8	0
Icebergs	33	43.3	2
Missiles	30	188.3	10
Derelicts	25	130.4	2
Surveys	22	1,319.1	43
Other	20	369.4	12
Piracy	8	76.4	1
Wrecks	7	769.5	25
Towing	7	23.3	1
Spills	4	78	4
Restricted	1	225.7	8
Containers	1	3	0
Debris	1	3	0
War risk	0	62	2
Ordnance	0	62	2
Structures	0	31	1
Volcanic	0	31	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Cable ops · South Atlantic Ocean	43	297.3	13	67	1.6× / 27.8
Icebergs · Labrador Seasurge	30	32.5	2	32	5.0× / 6
Incidents · North Pacific Oceansurge	24	89.2	4	56	2.2× / 11
Incidents · Indian Oceansurge	23	76.8	2	31	5.5× / 4.2
Incidents · North Atlantic Ocean	21	162.9	7	48	1.7× / 12.4
Incidents · South China Seasurge	15	55.2	3	41	4.4× / 3.4
Exercises · South Atlantic Ocean	14	87.6	0	—	1.7× / 8.2
Exercises · North Pacific Ocean	12	83.4	2	36	1.2× / 10.2
Derelicts · Indian Oceansurge	12	37.1	0	—	8.6× / 1.4
Quakes · North Pacific Ocean	11	34.5	0	—	1.7× / 6.6
Nav aids · North Sea	10	315.7	12	329	1.6× / 6.2
Missiles · North Pacific Ocean	10	72.2	3	39	1.7× / 6
Quakes · South Pacific Ocean	10	30	0	—	1.1× / 9.2
Nav aids · Gulf of Mexicolong running	8	92.5	6	570	1.7× / 4.8
Nav aids · South Atlantic Oceanlong running	7	489	15	1,745	1.1× / 6.2
Exercises · Arabian Sea	7	63.1	1	35	1.3× / 5.4
Missiles · North Atlantic Ocean	7	28.2	2	33	1.5× / 4.6
Towing · Barentsz Seanew	7	23.3	1	23	new / 0
Incidents · South Pacific Ocean	7	22.9	1	26	0.9× / 7.6
Nav aids · North Atlantic Ocean	6	249.1	9	244	1.4× / 4.2
Exercises · Yellow Sea	6	46.2	1	37	1.2× / 5
Exercises · Mediterranean Sea - Eastern Basinsurge	6	24.3	1	31	2.7× / 2.2
Exercises · Bering Seasurge	6	19	2	23	7.5× / 0.8
Surveys · South Atlantic Oceansurge	5	252.1	8	128	2.8× / 1.8
Cable ops · South China Sea	5	129.1	6	121	1.5× / 3.4
Other · North Seasurge	5	111.2	4	261	6.3× / 0.8
Surveys · Mediterranean Sea - Eastern Basinsurge	5	46.7	1	182	3.1× / 1.6
Nav aids · Irish Sea and St. George's Channelsurge	5	43.9	2	72	2.8× / 1.8
Other · North Atlantic Oceansurge	5	40.4	2	284	4.2× / 1.2
Nav aids · North Pacific Ocean	5	39.6	1	176	1.9× / 2.6
Incidents · Philippine Seasurge	5	2.5	0	—	2.3× / 2.2
Incidents · South Atlantic Ocean	4	64.4	3	48	0.7× / 5.6
Incidents · Gulf of Mexico	4	61.6	2	27	1.7× / 2.4
Incidents · Caribbean Sea	4	51.6	2	60	1.7× / 2.4
Derelicts · North Atlantic Ocean	4	31.1	1	22	1.3× / 3
Exercises · Baltic Seasurge	4	17.1	0	—	3.3× / 1.2
Incidents · Mediterranean Sea - Eastern Basinsurge	4	16.9	1	32	3.3× / 1.2
Cable ops · Bay of Bengal	3	83	2	212	1.1× / 2.6
Exercises · South China Sea	3	65.2	2	35	1.1× / 2.6
Exercises · Bay of Bengal	3	64.2	1	65	0.5× / 6.4
Cable ops · Gulf of Mexico	3	49.5	3	55	1.1× / 2.8
Exercises · Philippine Sea	3	48.3	0	—	0.5× / 6
Surveys · Indian Oceansurge	3	48.1	1	91	3.0× / 1
Derelicts · South Pacific Ocean	3	37.8	1	338	1.4× / 2.2
Piracy · Gulf of Guineasurge	3	29.9	0	—	3.8× / 0.8
Piracy · Gulf of Adensurge	3	15	0	—	2.5× / 1.2
Exercises · Coral Seasurge	3	13.5	0	—	15× / 0.2
Derelicts · North Pacific Oceansurge	3	12	0	—	3.8× / 0.8
Cable ops · Banda Seasurge	3	11.5	0	—	15× / 0.2
Exercises · Black Seasurge	3	10.4	0	—	3.8× / 0.8
Quakes · Sea of Okhotsknew	3	9	0	—	new / 0
Nav aids · Coral Sea	3	0.9	0	—	0.8× / 4
Cable ops · North Sea	2	153.2	5	73	1.7× / 1.2
Cable ops · North Atlantic Ocean	2	149	3	88	0.4× / 5.6
Nav aids · English Channellong running	2	68	2	421	0.8× / 2.4
Cable ops · Arabian Sea	2	66	1	158	0.9× / 2.2
Surveys · Mediterranean Sea - Western Basin	2	46.7	2	25	10× / 0.2
Cable ops · Mozambique Channel	2	42.6	2	102	5.0× / 0.4
Exercises · North Atlantic Ocean	2	39	1	65	0.3× / 7.6
Missiles · Aegean Sea	2	35.5	1	149	10× / 0.2
Nav aids · Inner Seas off the West Coast of Scotland	2	32.8	1	49	0.8× / 2.6
Wrecks · Laccadive Seanew	2	29.6	1	29	new / 0
Surveys · Gulf of Suez	2	29.2	2	14	10× / 0.2
Nav aids · South Pacific Ocean	2	23.3	2	21	1.3× / 1.6
Missiles · South Atlantic Ocean	2	17	0	—	10× / 0.2
Spills · North Atlantic Ocean	2	15	1	26	1.0× / 2
Missiles · South Pacific Ocean	2	7.7	1	33	5.0× / 0.4
Cable ops · English Channel	2	6.9	0	—	2.0× / 1
Quakes · Indian Ocean	2	6	0	—	0.6× / 3.4
Quakes · South Atlantic Ocean	2	6	0	—	2.5× / 0.8
Incidents · Davis Strait	2	4.8	1	22	3.3× / 0.6
Exercises · South Pacific Ocean	2	3	1	5	0.4× / 4.8
Missiles · Indian Ocean	2	2.1	1	1	10× / 0.2
Nav aids · Tasman Sea	2	1.8	0	—	5.0× / 0.4
Other · Indian Ocean	2	1.7	0	—	5.0× / 0.4
Incidents · Tasman Sea	2	1.1	0	—	1.0× / 2
Incidents · Coral Sea	2	0.2	0	—	0.4× / 5.2
Incidents · Timor Sea	2	0.2	0	—	10× / 0.2
Cable ops · Norwegian Sea	1	128	5	63	0.6× / 1.6
Exercises · Aegean Sea	1	85.5	3	149	new / 0
Wrecks · Persian Gulf	1	78.5	3	269	new / 0
Cable ops · Mediterranean Sea - Eastern Basin	1	69.8	1	32	0.5× / 2.2
Other · North Pacific Oceanlong running	1	65	2	410	5.0× / 0.2
Exercises · Laccadive Sea	1	63.3	2	92	0.3× / 3.8
Surveys · North Pacific Ocean	1	58.8	2	301	1.7× / 0.6
Cable ops · Black Sea	1	57.4	2	44	2.5× / 0.4
Incidents · Mozambique Channel	1	39.8	1	35	1.3× / 0.8
Incidents · Tyrrhenian Sealong running	1	37.4	1	502	5.0× / 0.2
Nav aids · Caribbean Sea	1	36.9	2	189	5.0× / 0.2
Wrecks · Baltic Sea	1	35.5	2	133	new / 0
Nav aids · Bay of Bengal	1	35.5	2	44	2.5× / 0.4
Other · South Atlantic Ocean	1	34	1	106	0.7× / 1.4
Nav aids · Indian Ocean	1	31	1	118	1.3× / 0.8
Wrecks · South China Sea	1	29.2	1	29	new / 0
Incidents · Bay of Bengal	1	28.4	1	28	1.3× / 0.8
Wrecks · Bay of Bengal	1	26.8	1	26	new / 0
Other · Gulf of Mexico	1	21.5	1	21	5.0× / 0.2
Other · South China Sea	1	20.2	0	—	2.5× / 0.4
Surveys · South China Sea	1	17.4	0	—	new / 0
Nav aids · Gulf of California	1	16.3	1	16	new / 0
Missiles · Barentsz Sea	1	14.9	0	—	1.3× / 0.8
Spills · Gulf of Mexico	1	12	1	12	0.2× / 5.8
Spills · North Pacific Ocean	1	12	1	12	0.5× / 2.2
Piracy · Indian Ocean	1	11.5	0	—	0.2× / 5.4
Surveys · Balearic (Iberian Sea)	1	11.4	1	11	new / 0
Cable ops · Flores Sea	1	11	0	—	new / 0
Incidents · Adriatic Sea	1	9.6	0	—	5.0× / 0.2
Restricted · English Channel	1	8.7	1	8	5.0× / 0.2
Other · Tasman Sea	1	8.7	1	8	1.7× / 0.6
Nav aids · Mediterranean Sea - Western Basin	1	8.3	0	—	5.0× / 0.2
Surveys · Black Sea	1	7.4	1	7	1.0× / 1
Missiles · Laccadive Sea	1	6.7	0	—	2.5× / 0.4
Other · Adriatic Sea	1	6.6	0	—	new / 0
Exercises · Andaman or Burma Sea	1	5.2	0	—	0.8× / 1.2
Cable ops · Inner Seas off the West Coast of Scotland	1	5	0	—	new / 0
Icebergs · South Atlantic Ocean	1	4.8	0	—	0.5× / 2.2
Exercises · Barentsz Sea	1	4.1	0	—	5.0× / 0.2
Quakes · Arabian Sea	1	3	0	—	new / 0
Quakes · Banda Sea	1	3	0	—	5.0× / 0.2
Quakes · Bismarck Sea	1	3	0	—	2.5× / 0.4
Quakes · Caribbean Sea	1	3	0	—	2.5× / 0.4
Containers · Celtic Sea	1	3	0	—	2.5× / 0.4
Quakes · Coral Sea	1	3	0	—	0.5× / 2.2
Icebergs · Indian Ocean	1	3	0	—	new / 0
Icebergs · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Debris · North Sea	1	3	0	—	new / 0
Derelicts · Persian Gulf	1	3	0	—	new / 0
Quakes · Persian Gulf	1	3	0	—	new / 0
Quakes · Philippine Sea	1	3	0	—	0.4× / 2.6
Derelicts · South Atlantic Ocean	1	3	0	—	0.6× / 1.8
Derelicts · Timor Sea	1	3	0	—	new / 0
Cable ops · Arafura Sea	1	2.7	1	2	5.0× / 0.2
Piracy · Gulf of Oman	1	2.6	1	2	1.7× / 0.6
Missiles · Arabian Sea	1	2.5	0	—	new / 0
Nav aids · Arafura Sea	1	1.6	0	—	new / 0
Other · Coral Sea	1	1.6	0	—	5.0× / 0.2
Surveys · Philippine Sea	1	1.3	1	1	2.5× / 0.4
Incidents · Solomon Sea	1	1.3	0	—	5.0× / 0.2
Missiles · Norwegian Sea	1	1.1	1	1	2.5× / 0.4
Other · South Pacific Ocean	1	1.1	0	—	1.7× / 0.6
Wrecks · Mozambique Channel	1	1	0	—	new / 0
Incidents · Bismarck Sea	1	0.9	0	—	new / 0
Exercises · Sulu Sea	1	0.8	0	—	new / 0
Missiles · Black Sea	1	0.4	1	0	2.5× / 0.4
Incidents · Malacca Strait	1	0.2	1	0	new / 0
Incidents · Great Australian Bight	1	0.1	0	—	1.3× / 0.8
Exercises · Mediterranean Sea - Western Basin	1	0.1	0	—	1.7× / 0.6
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	0.1	0	—	0.6× / 1.8
Nav aids · Great Australian Bight	1	0	0	—	2.5× / 0.4
Surveys · Arctic Oceanlong running	0	248	8	949	— / 0
Surveys · Beaufort Sealong running	0	186	6	1,024	— / 0
Wrecks · South Atlantic Oceanlong running	0	143.6	4	1,115	0.0× / 0.6
Nav aids · Arabian Sealong running	0	93	3	721	0.0× / 0.8
Wrecks · Arabian Sea	0	93	3	158	0.0× / 0.2
Nav aids · Sea of Okhotsklong running	0	93	3	528	— / 0
Surveys · Arabian Sea	0	62	2	148	0.0× / 0.2
Restricted · Black Sea	0	62	2	288	— / 0
Nav aids · Kara Sealong running	0	62	2	632	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	737	0.0× / 1
Restricted · North Sealong running	0	62	2	648	0.0× / 0.2
Nav aids · South China Sealong running	0	62	2	655	0.0× / 0.2
Surveys · The Northwestern Passages	0	62	2	298	— / 0
Wrecks · The Northwestern Passageslong running	0	62	2	999	— / 0
Surveys · Andaman or Burma Sea	0	61	1	150	— / 0
Surveys · South Pacific Ocean	0	57	1	41	— / 0
Wrecks · English Channel	0	53.3	1	89	0.0× / 0.4
Nav aids · Andaman or Burma Sea	0	31	1	120	0.0× / 0.2
Wrecks · Andaman or Burma Sea	0	31	1	129	— / 0
Nav aids · Bass Strait	0	31	1	60	0.0× / 0.4
Surveys · Bay of Bengal	0	31	1	38	0.0× / 0.2
Surveys · Bering Sea	0	31	1	305	— / 0
Nav aids · Celtic Sea	0	31	1	218	0.0× / 1.4
Surveys · Chukchi Sea	0	31	1	179	— / 0
Wrecks · Coral Sea	0	31	1	67	— / 0
Nav aids · Eastern China Sealong running	0	31	1	472	— / 0
Surveys · Gulf of Mexico	0	31	1	58	0.0× / 0.2
Wrecks · Indian Ocean	0	31	1	163	— / 0
Ordnance · Inner Seas off the West Coast of Scotland	0	31	1	35	— / 0
Exercises · Ionian Sea	0	31	1	149	— / 0
Wrecks · Irish Sea and St. George's Channel	0	31	1	344	— / 0
Nav aids · Laccadive Sea	0	31	1	35	0.0× / 0.2
Other · Mediterranean Sea - Western Basin	0	31	1	105	— / 0
Restricted · Mediterranean Sea - Western Basin	0	31	1	43	— / 0
Restricted · North Atlantic Ocean	0	31	1	154	0.0× / 0.4
Wrecks · North Atlantic Oceanlong running	0	31	1	601	0.0× / 0.4
Ordnance · North Sealong running	0	31	1	555	0.0× / 1.6
Structures · North Sealong running	0	31	1	655	— / 0
Wrecks · North Sea	0	31	1	81	0.0× / 0.4
Volcanic · Philippine Sealong running	0	31	1	397	0.0× / 0.2
Restricted · Sea of Okhotsklong running	0	31	1	596	0.0× / 0.2
Spills · South Atlantic Oceanlong running	0	31	1	567	— / 0
Wrecks · Yellow Sealong running	0	31	1	529	— / 0
Other · Timor Sea	0	23	0	—	— / 0
Piracy · South China Sea	0	17.4	0	—	0.0× / 0.8
Incidents · Arabian Sea	0	17	0	—	0.0× / 0.6
Spills · Caribbean Sea	0	8	0	—	— / 0
Cable ops · Persian Gulf	0	5	0	—	0.0× / 1.2
Cable ops · Ceram Sea	0	3.5	0	—	0.0× / 0.2
Derelicts · Arabian Sea	0	3.4	0	—	0.0× / 0.2
Other · Caribbean Sea	0	3.4	0	—	— / 0

Cite: seahazards.com Sea Ledger, 2013-05, 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.