Sea Ledger, April 2014

2014-04-01 to 2014-04-30 · archive

issued: 550
warning-days in force: 8,969
in force at month end: 306
sea × type cells: 214

baseline: same month, previous 5 years (2013-04, 2012-04, 2011-04, 2010-04, 2009-04)

By type

type	issued	warning-days	in force at end
Incidents	121	842.4	39
Exercises	98	914.4	25
Quakes	71	200	1
Nav aids	57	2,516.3	88
Cable ops	37	1,327.8	46
Icebergs	35	49.8	3
Missiles	31	240.9	2
Derelicts	27	99.3	5
Surveys	27	1,026.7	34
Other	12	482.7	20
Piracy	8	52.7	5
Wrecks	6	591.9	20
Containers	5	14.1	0
Debris	5	15	0
Spills	5	75	1
Ordnance	4	159.9	5
Volcanic	1	60	2
Restricted	0	120	4
Mines	0	30	1
War risk	0	60	2
Structures	0	90	3

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Incidents · North Pacific Oceansurge	36	187	10	36	2.2× / 16.4
Quakes · South Pacific Oceansurge	29	81.5	0	—	3.1× / 9.2
Icebergs · North Atlantic Oceannew	20	21.9	1	31	new / 0
Incidents · North Atlantic Ocean	17	208.5	10	68	1.8× / 9.4
Exercises · Black Seasurge	17	99.7	1	34	7.1× / 2.4
Quakes · Solomon Seasurge	17	48	0	—	8.5× / 2
Exercises · Bay of Bengalsurge	15	109.8	5	36	2.6× / 5.8
Exercises · North Pacific Ocean	15	85.6	4	36	1.3× / 12
Incidents · South Pacific Oceansurge	15	57.4	4	24	2.7× / 5.6
Exercises · Yellow Seasurge	14	116.4	3	35	2.6× / 5.4
Quakes · Coral Seasurge	12	33.8	0	—	20× / 0.6
Nav aids · North Sealong running	11	317.6	12	515	1.3× / 8.6
Surveys · South Atlantic Oceansurge	10	161.7	5	229	2.5× / 4
Incidents · South China Sea	9	48.2	2	29	1.1× / 7.8
Incidents · Mediterranean Sea - Eastern Basinsurge	9	29.2	2	31	4.5× / 2
Derelicts · Philippine Seasurge	9	10.8	1	11	45× / 0.2
Icebergs · Labrador Sea	9	9.7	1	25	1.1× / 8.6
Cable ops · South Atlantic Ocean	8	174.3	5	148	0.3× / 26.6
Nav aids · South Atlantic Oceanlong running	7	482.6	17	1,134	1.0× / 6.8
Nav aids · North Atlantic Oceansurgelong running	7	230.6	8	391	2.2× / 3.2
Nav aids · Coral Seasurge	7	27.7	1	22	3.9× / 1.8
Cable ops · South China Seasurge	6	159	7	249	4.3× / 1.4
Cable ops · North Atlantic Ocean	6	157.7	6	54	1.5× / 4
Incidents · Indian Ocean	6	64.2	2	34	0.8× / 7.6
Missiles · North Atlantic Oceansurge	6	26.7	0	—	3.0× / 2
Quakes · North Pacific Ocean	6	18	0	—	0.6× / 10.4
Cable ops · Arabian Sea	5	90.8	4	113	1.6× / 3.2
Exercises · Arabian Sea	5	59	2	34	1.0× / 5.2
Incidents · Caribbean Seasurge	5	32.2	3	27	2.5× / 2
Exercises · South Pacific Oceansurge	5	18	0	—	2.3× / 2.2
Exercises · Philippine Sea	4	53.6	1	34	1.1× / 3.8
Spills · Gulf of Mexico	4	53	1	43	1.1× / 3.6
Exercises · South Atlantic Ocean	4	42.6	1	27	0.5× / 8.2
Incidents · South Atlantic Ocean	4	36.3	1	29	0.7× / 6
Surveys · Aegean Seanew	4	35.8	2	23	new / 0
Missiles · North Pacific Ocean	4	26.8	0	—	0.5× / 8
Missiles · Barentsz Seasurge	4	18.3	0	—	2.5× / 1.6
Missiles · Indian Oceansurge	4	15.5	0	—	20× / 0.2
Exercises · Bering Seasurge	4	13	0	—	6.7× / 0.6
Derelicts · North Atlantic Ocean	4	12	0	—	1.3× / 3.2
Icebergs · Southern Ocean	4	10.2	1	30	1.7× / 2.4
Nav aids · Irish Sea and St. George's Channel	4	6.4	1	27	1.8× / 2.2
Incidents · Coral Sea	4	0.5	0	—	1.8× / 2.2
Nav aids · English Channellong running	3	85.8	2	755	1.0× / 3
Surveys · Black Seasurge	3	69	3	57	5.0× / 0.6
Missiles · South Atlantic Ocean	3	47.4	1	32	1.7× / 1.8
Surveys · Mediterranean Sea - Western Basinsurge	3	44.5	1	30	15× / 0.2
Exercises · Baltic Sea	3	13.3	1	33	1.5× / 2
Missiles · Bay of Bengalsurge	3	11.2	0	—	5.0× / 0.6
Derelicts · Indian Ocean	3	9.2	1	30	0.6× / 5
Nav aids · Arabian Sealong running	2	139.7	6	1,055	2.5× / 0.8
Nav aids · Gulf of Mexicolong running	2	125.4	4	904	1.3× / 1.6
Nav aids · Inner Seas off the West Coast of Scotland	2	92.4	3	300	0.6× / 3.4
Cable ops · Mediterranean Sea - Eastern Basin	2	83.9	3	85	1.3× / 1.6
Nav aids · Indian Ocean	2	82.2	3	314	10× / 0.2
Other · North Sealong running	2	69.4	3	595	1.4× / 1.4
Incidents · Gulf of Adennew	2	30.1	2	15	new / 0
Missiles · Japan Sea	2	20	0	—	1.7× / 1.2
Wrecks · Caribbean Sea	2	19.6	1	26	10× / 0.2
Exercises · Gulf of Mexico	2	19.5	0	—	3.3× / 0.6
Cable ops · Tasman Sea	2	18.9	0	—	2.0× / 1
Other · Mediterranean Sea - Eastern Basin	2	18.1	1	14	1.4× / 1.4
Derelicts · Caribbean Sea	2	16.4	1	21	5.0× / 0.4
Piracy · Gulf of Aden	2	14.6	2	14	1.1× / 1.8
Piracy · Gulf of Guinea	2	10.9	2	9	2.5× / 0.8
Exercises · Mediterranean Sea - Eastern Basin	2	8.1	0	—	0.4× / 4.8
Ordnance · Baltic Seanew	2	7.4	0	—	new / 0
Containers · English Channel	2	6.6	0	—	5.0× / 0.4
Missiles · Greenland Seanew	2	6.6	0	—	new / 0
Icebergs · South Pacific Ocean	2	6	0	—	1.7× / 1.2
Quakes · Southern Ocean	2	6	0	—	3.3× / 0.6
Piracy · South China Sea	2	5.5	0	—	0.6× / 3.2
Derelicts · Gulf of Mexiconew	2	4.2	0	—	new / 0
Exercises · North Seanew	2	4.2	0	—	new / 0
Quakes · South Atlantic Ocean	2	3.7	1	32	0.9× / 2.2
Derelicts · South China Sea	2	3.1	0	—	2.0× / 1
Other · Ionian Sea	2	0.6	0	—	10× / 0.2
Incidents · Tasman Sea	2	0.3	0	—	2.0× / 1
Incidents · Davis Strait	2	0.2	0	—	2.5× / 0.8
Other · South Atlantic Ocean	1	138.7	5	177	5.0× / 0.2
Wrecks · Arabian Sealong running	1	138	4	377	1.0× / 1
Cable ops · North Sea	1	120	4	109	0.5× / 2
Surveys · Arabian Sealong running	1	112.4	4	482	1.3× / 0.8
Exercises · Aegean Sea	1	98	2	118	5.0× / 0.2
Cable ops · Gulf of Guinea	1	85.8	2	111	0.5× / 2.2
Exercises · South China Sea	1	63.8	1	33	0.5× / 2.2
Other · North Pacific Oceanlong running	1	62.1	3	744	0.8× / 1.2
Nav aids · North Pacific Oceanlong running	1	60	2	510	0.3× / 3.4
Ordnance · North Sealong running	1	60	2	889	5.0× / 0.2
Volcanic · Philippine Sealong running	1	60	2	731	5.0× / 0.2
Cable ops · Barentsz Sea	1	51.1	2	39	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	45.4	1	77	2.5× / 0.4
Cable ops · South Pacific Ocean	1	44.9	2	81	5.0× / 0.2
Incidents · Laccadive Sea	1	41.7	1	41	2.5× / 0.4
Other · North Atlantic Ocean	1	38.5	1	170	2.5× / 0.4
Surveys · Mediterranean Sea - Eastern Basin	1	36.4	1	51	0.6× / 1.6
Surveys · Baltic Sea	1	34.6	1	30	5.0× / 0.2
Nav aids · Persian Gulf	1	33.4	2	294	5.0× / 0.2
Nav aids · Bay of Bengal	1	33.2	1	54	1.0× / 1
Other · South China Sea	1	32.5	2	252	1.0× / 1
Other · Caribbean Sea	1	32.4	2	131	1.3× / 0.8
Nav aids · Celtic Sealong running	1	31.5	2	552	0.6× / 1.8
Exercises · Laccadive Sea	1	31.1	1	34	0.3× / 3.2
Wrecks · Barentsz Sea	1	28.4	1	195	new / 0
Surveys · Andaman or Burma Sea	1	27.4	0	—	5.0× / 0.2
Cable ops · Makassar Strait	1	25.5	0	—	new / 0
Incidents · Arabian Sea	1	22.7	1	22	0.6× / 1.6
Nav aids · Andaman or Burma Sea	1	22.3	1	22	5.0× / 0.2
Spills · North Atlantic Ocean	1	22	0	—	2.5× / 0.4
Cable ops · Baltic Sea	1	20.4	1	20	new / 0
Missiles · Arabian Sea	1	19.7	0	—	1.3× / 0.8
Incidents · Gulf of Mexico	1	19.2	0	—	1.3× / 0.8
Nav aids · Mediterranean Sea - Eastern Basin	1	14.9	0	—	new / 0
Surveys · North Sea	1	14.3	0	—	1.7× / 0.6
Incidents · Philippine Sea	1	11.7	0	—	0.5× / 2
Incidents · Mozambique Channel	1	11.5	0	—	0.5× / 2
Wrecks · South Atlantic Ocean	1	11	0	—	5.0× / 0.2
Missiles · South Pacific Ocean	1	10.3	0	—	0.5× / 2.2
Exercises · Caribbean Sea	1	9.8	0	—	new / 0
Incidents · Persian Gulf	1	7.3	0	—	new / 0
Piracy · Malacca Strait	1	6.8	1	6	2.5× / 0.4
Piracy · Arabian Sea	1	6.1	0	—	0.2× / 5.6
Exercises · Adriatic Sea	1	6	0	—	2.5× / 0.4
Cable ops · Eastern China Sea	1	6	1	36	5.0× / 0.2
Nav aids · Tasman Sea	1	5.5	0	—	2.5× / 0.4
Missiles · Laccadive Sea	1	5	0	—	1.7× / 0.6
Cable ops · Celtic Sea	1	3.9	0	—	0.6× / 1.6
Quakes · Aegean Sea	1	3	0	—	5.0× / 0.2
Debris · Caribbean Sea	1	3	0	—	new / 0
Quakes · Celebes Sea	1	3	0	—	new / 0
Quakes · Indian Ocean	1	3	0	—	0.2× / 6.4
Derelicts · Ionian Sea	1	3	0	—	new / 0
Derelicts · Laccadive Sea	1	3	0	—	new / 0
Containers · North Atlantic Ocean	1	3	0	—	5.0× / 0.2
Debris · North Atlantic Ocean	1	3	0	—	0.8× / 1.2
Debris · North Sea	1	3	0	—	5.0× / 0.2
Debris · Persian Gulf	1	3	0	—	new / 0
Derelicts · South Atlantic Ocean	1	3	0	—	5.0× / 0.2
Containers · Tasman Sea	1	3	0	—	new / 0
Debris · Timor Sea	1	3	0	—	5.0× / 0.2
Derelicts · Japan Sea	1	2.8	1	2	2.5× / 0.4
Ordnance · Japan Sea	1	2.5	0	—	new / 0
Surveys · South China Sea	1	2.5	1	2	2.5× / 0.4
Derelicts · The Coastal Waters of Southeast Alaska and British Columbia	1	1.8	0	—	new / 0
Containers · Celtic Sea	1	1.5	0	—	new / 0
Exercises · Persian Gulf	1	1.4	1	1	5.0× / 0.2
Incidents · Andaman or Burma Sea	1	1.1	0	—	1.7× / 0.6
Surveys · North Atlantic Ocean	1	1.1	1	1	1.3× / 0.8
Incidents · Solomon Sea	1	1.1	0	—	5.0× / 0.2
Nav aids · Arafura Sea	1	0.7	0	—	new / 0
Wrecks · Inner Seas off the West Coast of Scotland	1	0.5	1	0	5.0× / 0.2
Other · Tasman Sea	1	0.4	0	—	new / 0
Incidents · Java Sea	1	0.2	0	—	5.0× / 0.2
Incidents · Great Australian Bight	1	0.1	0	—	1.0× / 1
Nav aids · Gulf of Alaska	1	0.1	0	—	0.4× / 2.6
Nav aids · Caribbean Sea	0	188.9	6	339	— / 0
Surveys · Arctic Oceanlong running	0	150	5	1,283	— / 0
Surveys · Beaufort Sealong running	0	120	4	1,358	— / 0
Wrecks · Persian Gulflong running	0	90	3	506	— / 0
Nav aids · South China Sealong running	0	90	3	989	0.0× / 0.2
Surveys · The Northwestern Passageslong running	0	90	3	632	— / 0
Cable ops · Bay of Bengal	0	60	2	57	0.0× / 2.8
Ordnance · Black Sea	0	60	2	306	— / 0
Nav aids · Gulf of California	0	60	2	350	— / 0
Cable ops · Gulf of Mexico	0	60	2	121	0.0× / 1.8
Exercises · Ionian Sea	0	60	2	118	0.0× / 0.2
Nav aids · Kara Sealong running	0	60	2	966	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	60	2	1,071	— / 0
Restricted · North Sealong running	0	60	2	982	0.0× / 0.2
Structures · North Sealong running	0	60	2	989	0.0× / 0.4
Wrecks · North Sealong running	0	60	2	415	0.0× / 0.2
Cable ops · Persian Gulf	0	60	2	180	0.0× / 1.6
Nav aids · Sea of Okhotsklong running	0	60	2	862	— / 0
Nav aids · Singapore Strait	0	60	2	275	— / 0
Nav aids · Southern Ocean	0	60	2	159	— / 0
Nav aids · Bass Straitlong running	0	30.3	1	394	0.0× / 0.2
Missiles · Aegean Sea	0	30	1	118	— / 0
Cable ops · Andaman or Burma Sea	0	30	1	100	0.0× / 0.2
Wrecks · Arctic Ocean	0	30	1	250	— / 0
Wrecks · Bay of Bengal	0	30	1	274	— / 0
Surveys · Bering Sea	0	30	1	278	— / 0
Mines · Black Sea	0	30	1	306	— / 0
Restricted · Black Sea	0	30	1	329	0.0× / 0.2
Other · Celtic Sea	0	30	1	30	0.0× / 0.6
Surveys · Chukchi Sealong running	0	30	1	513	— / 0
Surveys · Coral Sea	0	30	1	189	— / 0
Wrecks · Coral Sea	0	30	1	154	— / 0
Nav aids · Eastern China Sealong running	0	30	1	806	— / 0
Wrecks · Eastern China Sea	0	30	1	180	— / 0
Other · Gulf of Mexico	0	30	1	355	0.0× / 0.2
Cable ops · Indian Ocean	0	30	1	146	0.0× / 0.6
Other · Indian Ocean	0	30	1	80	0.0× / 0.8
Ordnance · Inner Seas off the West Coast of Scotland	0	30	1	327	0.0× / 0.4
Cable ops · Kara Sea	0	30	1	158	— / 0
Nav aids · Laccadive Sealong running	0	30	1	369	0.0× / 0.2
Wrecks · Mediterranean Sea - Western Basin	0	30	1	71	— / 0
Structures · North Atlantic Ocean	0	30	1	253	— / 0
Wrecks · North Atlantic Oceanlong running	0	30	1	935	— / 0
Restricted · Sea of Okhotsklong running	0	30	1	930	— / 0
Derelicts · South Pacific Oceanlong running	0	30	1	672	0.0× / 1.2

Cite: seahazards.com Sea Ledger, 2014-04, 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.