Sea Ledger, March 2016

2016-03-01 to 2016-03-31 · archive

issued: 562
warning-days in force: 10,407
in force at month end: 334
sea × type cells: 233

baseline: same month, previous 5 years (2015-03, 2014-03, 2013-03, 2012-03, 2011-03)

By type

type	issued	warning-days	in force at end
Incidents	148	1,145.3	35
Exercises	104	1,249.4	36
Nav aids	55	2,733.6	85
Cable ops	51	1,058.4	36
Icebergs	42	59.1	3
Surveys	33	1,541.1	53
Quakes	28	85.9	1
Other	26	406.6	14
Missiles	22	190.4	4
Derelicts	19	135.4	7
Spills	15	229	8
Debris	8	24	0
Ordnance	3	82.3	4
Restricted	2	284.1	11
Piracy	2	16.9	0
Containers	2	6	0
Structures	1	93.6	3
Wrecks	1	879.8	28
War risk	0	62	2
Volcanic	0	124	4

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · North Atlantic Oceansurge	32	33.1	2	32	5.7× / 5.6
Incidents · South China Seasurge	30	232.9	6	45	2.4× / 12.4
Incidents · North Pacific Ocean	25	141.8	5	42	1.1× / 22.8
Incidents · Mediterranean Sea - Eastern Basinsurge	23	120.7	5	33	3.7× / 6.2
Exercises · North Pacific Ocean	22	162.6	5	63	1.4× / 16.2
Incidents · North Atlantic Ocean	20	152	3	40	1.6× / 12.8
Exercises · Yellow Sea	15	110.4	3	36	1.7× / 8.6
Nav aids · North Sea	11	187.5	6	226	1.1× / 10
Incidents · Caribbean Seasurge	11	135.7	5	69	3.9× / 2.8
Surveys · South Atlantic Ocean	10	179.8	5	210	1.6× / 6.2
Exercises · Bay of Bengal	10	54	2	31	1.0× / 10
Cable ops · Bay of Bengalsurge	8	194.7	7	91	4.4× / 1.8
Exercises · Arabian Sea	8	119.3	2	35	1.0× / 7.8
Spills · Gulf of Mexicosurge	8	97	4	44	2.2× / 3.6
Quakes · North Pacific Ocean	8	24	0	—	0.2× / 46.4
Incidents · South Pacific Ocean	7	46.7	4	44	1.2× / 5.8
Exercises · South Atlantic Ocean	7	35.3	1	31	0.8× / 8.4
Missiles · North Pacific Ocean	7	28	1	27	1.4× / 5
Cable ops · Mediterranean Sea - Eastern Basinsurge	6	78.2	3	103	10× / 0.6
Exercises · North Atlantic Ocean	6	38.3	1	63	1.3× / 4.6
Exercises · Baltic Sea	6	18.5	1	30	1.7× / 3.6
Icebergs · South Atlantic Ocean	6	15.9	1	31	1.9× / 3.2
Other · English Channelsurge	6	9.6	0	—	30× / 0.2
Incidents · South Atlantic Ocean	5	109.9	4	47	0.8× / 6.2
Nav aids · Coral Sealong running	5	96.5	3	713	0.8× / 6
Nav aids · Inner Seas off the West Coast of Scotland	5	71.8	2	267	1.3× / 4
Exercises · Caribbean Seasurge	5	25.2	0	—	5.0× / 1
Missiles · North Atlantic Ocean	5	17.4	0	—	0.9× / 5.8
Surveys · Arabian Seasurge	4	82.5	5	59	3.3× / 1.2
Other · North Atlantic Oceansurgelong running	4	60	1	871	3.3× / 1.2
Nav aids · English Channel	4	55.6	2	74	1.2× / 3.4
Incidents · Indian Ocean	4	53.9	1	48	0.5× / 8.6
Exercises · Black Sea	4	21	2	32	0.7× / 5.8
Derelicts · North Atlantic Ocean	4	16.6	2	31	0.9× / 4.4
Quakes · South Pacific Ocean	4	12	0	—	0.4× / 10.6
Other · North Pacific Oceansurge	4	4.4	1	29	4.0× / 1
Nav aids · South Atlantic Ocean	3	409.2	12	202	0.4× / 8.2
Exercises · Aegean Sea	3	345.4	11	94	1.4× / 2.2
Nav aids · Gulf of Mexicosurgelong running	3	162.3	5	775	2.1× / 1.4
Cable ops · Andaman or Burma Seasurge	3	73	4	40	7.5× / 0.4
Exercises · Philippine Sea	3	70.7	2	35	0.8× / 3.6
Cable ops · Arabian Seasurge	3	60.1	3	169	3.8× / 0.8
Nav aids · Gulf of Suezsurge	3	58	1	36	15× / 0.2
Surveys · Mediterranean Sea - Eastern Basin	3	46.4	2	50	1.9× / 1.6
Cable ops · Eastern China Seasurge	3	46.3	1	62	15× / 0.2
Derelicts · South Pacific Oceansurgelong running	3	37.3	1	1,373	2.5× / 1.2
Cable ops · Singapore Straitnew	3	32.4	0	—	new / 0
Cable ops · South Atlantic Ocean	3	29.4	1	43	0.1× / 28.8
Derelicts · Bay of Bengalsurge	3	26.7	1	29	15× / 0.2
Cable ops · Sulu Seanew	3	26.2	2	13	new / 0
Cable ops · North Sea	3	26.1	1	23	1.7× / 1.8
Nav aids · Mediterranean Sea - Western Basin	3	16.9	2	16	1.7× / 1.8
Incidents · Coral Sea	3	10.2	0	—	0.7× / 4.4
Quakes · Indian Oceansurge	3	9.9	0	—	2.5× / 1.2
Quakes · South Atlantic Oceansurge	3	9	0	—	3.0× / 1
Incidents · Solomon Sea	3	8.5	0	—	1.9× / 1.6
Exercises · South Pacific Ocean	3	7.2	0	—	0.7× / 4.4
Nav aids · North Atlantic Oceanlong running	2	196.8	6	1,044	0.5× / 3.8
Cable ops · Gulf of Mexico	2	133	3	265	2.5× / 0.8
Nav aids · Indian Oceanlong running	2	112.6	3	771	1.1× / 1.8
Exercises · South China Sea	2	69.8	2	35	0.8× / 2.6
Missiles · Black Seanew	2	65.9	1	36	new / 0
Cable ops · Caribbean Seanew	2	64.3	2	75	new / 0
Surveys · Laccadive Sea	2	55.7	0	—	5.0× / 0.4
Surveys · Persian Gulf	2	50.1	3	76	3.3× / 0.6
Ordnance · Sea of Azovnew	2	41.3	3	52	new / 0
Spills · North Atlantic Ocean	2	39	1	45	1.3× / 1.6
Exercises · Laccadive Sea	2	38.1	1	34	1.4× / 1.4
Incidents · Laccadive Sea	2	34.2	0	—	2.5× / 0.8
Surveys · Gulf of Sueznew	2	29	1	30	new / 0
Spills · The Coastal Waters of Southeast Alaska and British Columbia	2	26	1	22	2.5× / 0.8
Surveys · Bay of Bengal	2	22.2	1	22	5.0× / 0.4
Spills · North Pacific Ocean	2	22	1	16	1.7× / 1.2
Nav aids · Gulf of Alaska	2	21.8	0	—	0.8× / 2.6
Incidents · Gulf of Mexico	2	19.8	0	—	1.0× / 2
Piracy · Gulf of Guinea	2	16.9	0	—	3.3× / 0.6
Incidents · Japan Sea	2	14.9	1	36	10× / 0.2
Exercises · Mediterranean Sea - Eastern Basin	2	13.7	0	—	0.4× / 5.6
Missiles · Barentsz Sea	2	13.2	1	13	1.0× / 2
Missiles · Bay of Bengal	2	12.6	0	—	1.4× / 1.4
Other · Mediterranean Sea - Eastern Basin	2	11	0	—	2.5× / 0.8
Quakes · Bismarck Sea	2	6	0	—	2.0× / 1
Containers · Celtic Sea	2	6	0	—	10× / 0.2
Icebergs · Indian Ocean	2	6	0	—	1.7× / 1.2
Debris · North Pacific Ocean	2	6	0	—	3.3× / 0.6
Exercises · Persian Gulf	2	3.3	0	—	5.0× / 0.4
Derelicts · English Channelnew	2	3.2	0	—	new / 0
Other · Arafura Seanew	2	3	0	—	new / 0
Nav aids · Bristol Channel	2	2.1	0	—	5.0× / 0.4
Incidents · Great Australian Bight	2	0.6	0	—	10× / 0.2
Incidents · Tasman Sea	2	0.3	0	—	1.4× / 1.4
Incidents · Philippine Sea	2	0.1	0	—	1.1× / 1.8
Restricted · North Sealong running	1	188.6	7	1,470	1.7× / 0.6
Nav aids · Bay of Bengal	1	138	5	178	2.5× / 0.4
Nav aids · North Pacific Oceanlong running	1	93.7	3	427	0.4× / 2.6
Nav aids · Singapore Strait	1	72.1	3	322	new / 0
Surveys · Indian Ocean	1	66.9	3	86	2.5× / 0.4
Cable ops · Indian Ocean	1	65.8	1	49	1.3× / 0.8
Nav aids · Bass Straitlong running	1	62.3	2	1,095	0.7× / 1.4
Nav aids · Great Australian Bightlong running	1	62	2	393	1.3× / 0.8
Spills · Caribbean Sea	1	45	1	48	new / 0
Surveys · Caribbean Sea	1	43.4	2	153	new / 0
Other · South China Sealong running	1	37.8	2	491	1.7× / 0.6
Incidents · Mediterranean Sea - Western Basin	1	36.9	1	53	1.3× / 0.8
Derelicts · South Atlantic Ocean	1	34	1	91	0.6× / 1.6
Restricted · Black Sealong running	1	33.5	2	1,030	new / 0
Nav aids · Tasman Sea	1	32	1	45	1.3× / 0.8
Other · Inner Seas off the West Coast of Scotland	1	26.3	1	26	5.0× / 0.2
Cable ops · North Atlantic Ocean	1	25.7	1	25	0.3× / 4
Wrecks · Indian Ocean	1	20.8	1	20	new / 0
Incidents · Mozambique Channel	1	19.3	0	—	0.5× / 2.2
Cable ops · Mozambique Channel	1	19.1	0	—	1.3× / 0.8
Surveys · North Sea	1	18.7	1	18	0.8× / 1.2
Surveys · Celtic Sea	1	17.2	0	—	5.0× / 0.2
Surveys · Irish Sea and St. George's Channel	1	17.2	1	17	2.5× / 0.4
Exercises · Gulf of Mexico	1	14.6	0	—	1.3× / 0.8
Surveys · Aegean Sea	1	10.6	1	10	2.5× / 0.4
Cable ops · Timor Sea	1	10.2	1	98	new / 0
Cable ops · Bass Strait	1	10	0	—	new / 0
Other · North Sea	1	10	0	—	0.7× / 1.4
Ordnance · South China Sea	1	10	0	—	new / 0
Other · Celtic Sea	1	9.7	1	9	5.0× / 0.2
Cable ops · Red Sea	1	9.6	1	9	5.0× / 0.2
Nav aids · Alboran Sea	1	9.4	1	9	new / 0
Cable ops · South China Sea	1	8.9	0	—	0.5× / 2
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	8.5	0	—	1.3× / 0.8
Other · South Pacific Ocean	1	7.5	0	—	5.0× / 0.2
Other · Arabian Sea	1	7.2	0	—	new / 0
Surveys · Coral Sea	1	7.1	0	—	new / 0
Missiles · South Pacific Ocean	1	6.2	0	—	0.6× / 1.6
Incidents · Arabian Sea	1	6	0	—	0.5× / 2
Missiles · Laccadive Sea	1	5.9	0	—	1.7× / 0.6
Cable ops · Gulf of Aden	1	5.4	0	—	5.0× / 0.2
Missiles · Indian Ocean	1	5.1	0	—	0.6× / 1.6
Missiles · South Atlantic Ocean	1	5.1	0	—	0.7× / 1.4
Cable ops · English Channel	1	5	0	—	new / 0
Quakes · Celebes Sea	1	4.4	0	—	new / 0
Exercises · Barentsz Sea	1	4.3	0	—	5.0× / 0.2
Cable ops · Inner Seas off the West Coast of Scotland	1	4	0	—	new / 0
Derelicts · Arabian Sea	1	3	0	—	1.0× / 1
Quakes · Banda Sea	1	3	0	—	new / 0
Debris · Caribbean Sea	1	3	0	—	new / 0
Quakes · Coral Sea	1	3	0	—	0.8× / 1.2
Quakes · Eastern China Sea	1	3	0	—	5.0× / 0.2
Quakes · Gulf of California	1	3	0	—	5.0× / 0.2
Debris · Gulf of Mexico	1	3	0	—	1.7× / 0.6
Debris · Indian Ocean	1	3	0	—	1.3× / 0.8
Derelicts · Laccadive Sea	1	3	0	—	2.5× / 0.4
Debris · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Debris · North Atlantic Ocean	1	3	0	—	1.3× / 0.8
Quakes · North Atlantic Ocean	1	3	0	—	new / 0
Debris · South Pacific Ocean	1	3	0	—	1.3× / 0.8
Icebergs · Southern Ocean	1	3	0	—	0.8× / 1.2
Quakes · Timor Sea	1	3	0	—	new / 0
Quakes · Molukka Sea	1	2.6	1	2	1.7× / 0.6
Exercises · Alboran Sea	1	2.4	0	—	1.7× / 0.6
Cable ops · Gulf of Thailand	1	2.4	0	—	new / 0
Exercises · Coral Sea	1	2.3	0	—	0.6× / 1.8
Other · Ionian Sea	1	2.1	1	2	new / 0
Derelicts · Persian Gulf	1	1.4	1	1	1.3× / 0.8
Derelicts · Ionian Sea	1	1.1	1	1	5.0× / 0.2
Icebergs · Labrador Sea	1	1.1	0	—	0.1× / 15.2
Nav aids · Andaman or Burma Sea	1	1	0	—	2.5× / 0.4
Other · Bering Sea	1	1	0	—	new / 0
Cable ops · Tasman Sea	1	0.9	1	0	1.7× / 0.6
Surveys · Barentsz Sea	1	0.8	0	—	5.0× / 0.2
Structures · South Atlantic Ocean	1	0.6	0	—	5.0× / 0.2
Derelicts · Caribbean Sea	1	0.5	0	—	0.7× / 1.4
Incidents · Celebes Sea	1	0.5	0	—	new / 0
Derelicts · South China Sea	1	0.5	0	—	2.5× / 0.4
Incidents · Baffin Bay	1	0.4	0	—	new / 0
Nav aids · Irish Sea and St. George's Channel	1	0.1	0	—	0.4× / 2.4
Nav aids · Caribbean Sealong running	0	277	8	780	0.0× / 1.6
Surveys · Beaufort Sealong running	0	248	8	2,059	— / 0
Surveys · Arctic Oceanlong running	0	186	6	1,984	— / 0
Wrecks · Arabian Sealong running	0	176.8	5	913	0.0× / 0.4
Surveys · North Atlantic Oceanlong running	0	155	5	667	0.0× / 1
Surveys · Davis Strait	0	124	4	186	— / 0
Nav aids · Celtic Sealong running	0	93.5	3	1,253	0.0× / 1.2
Nav aids · Arabian Sea	0	93	3	339	0.0× / 0.8
Exercises · Ionian Sea	0	93	3	89	0.0× / 0.2
Nav aids · Kara Sealong running	0	93	3	1,667	— / 0
Wrecks · Solomon Sealong running	0	93	3	387	0.0× / 1
Wrecks · South China Sealong running	0	93	3	689	0.0× / 0.4
Nav aids · Malacca Strait	0	84.5	2	322	— / 0
Other · Caribbean Sealong running	0	62	2	436	0.0× / 0.4
Wrecks · English Channel	0	62	2	212	0.0× / 0.2
Wrecks · Irish Sea and St. George's Channel	0	62	2	286	— / 0
Nav aids · Laccadive Sea	0	62	2	107	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	1,772	— / 0
Volcanic · Philippine Sealong running	0	62	2	1,432	— / 0
Nav aids · Sea of Okhotsklong running	0	62	2	1,563	0.0× / 0.2
Surveys · The Northwestern Passageslong running	0	62	2	1,333	— / 0
Surveys · Mozambique Channel	0	56.5	1	42	— / 0
Wrecks · Celtic Sea	0	31.2	1	213	— / 0
Missiles · Aegean Sea	0	31	1	90	— / 0
Wrecks · Andaman or Burma Sea	0	31	1	182	— / 0
Cable ops · Arafura Sea	0	31	1	95	0.0× / 0.2
Surveys · Bering Sea	0	31	1	269	— / 0
Other · Black Sea	0	31	1	88	— / 0

Cite: seahazards.com Sea Ledger, 2016-03, 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.