Sea Ledger, March 2019

2019-03-01 to 2019-03-31 · archive

issued: 669
warning-days in force: 10,924
in force at month end: 317
sea × type cells: 233

baseline: same month, previous 5 years (2018-03, 2017-03, 2016-03, 2015-03, 2014-03)

By type

type	issued	warning-days	in force at end
Exercises	124	1,502.5	33
Incidents	103	905.5	22
Icebergs	86	97.9	4
Nav aids	75	2,438.3	80
Surveys	63	2,122.2	67
Other	42	404	12
Derelicts	39	178.1	5
Quakes	36	97.9	5
Missiles	33	381.7	11
Cable ops	21	330.5	12
Wrecks	12	1,963.5	53
Debris	12	40.2	3
Spills	10	190	5
Piracy	6	46.9	1
Containers	5	15	0
Restricted	1	81.7	2
Ordnance	1	58	0
Structures	0	69.6	2

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · Labrador Seasurge	31	36.1	2	32	2.7× / 11.6
Other · North Atlantic Oceansurge	30	37.2	2	33	14× / 2.2
Incidents · South China Sea	28	260	6	48	1.1× / 26.4
Icebergs · Southern Oceansurge	28	26.8	2	30	2.0× / 14
Exercises · Mediterranean Sea - Eastern Basinsurge	25	207.8	5	150	4.0× / 6.2
Surveys · South Atlantic Ocean	23	300.3	11	362	1.5× / 15.6
Icebergs · South Atlantic Oceansurge	23	23	0	—	3.3× / 7
Exercises · North Pacific Ocean	19	138.6	6	61	0.9× / 21.2
Nav aids · South Atlantic Ocean	14	652.2	21	211	1.6× / 9
Quakes · South Pacific Ocean	13	31.7	3	30	1.4× / 9
Nav aids · North Sea	12	269.8	9	80	1.0× / 12
Exercises · Black Sea	11	185.8	3	35	1.3× / 8.2
Exercises · Bay of Bengal	11	66.7	3	31	1.2× / 9.4
Derelicts · Coral Seasurge	11	43.7	1	80	28× / 0.4
Exercises · South Atlantic Ocean	10	85.1	0	—	1.4× / 7
Surveys · Arabian Sea	9	131.9	4	101	1.7× / 5.2
Nav aids · Coral Sea	9	70.9	1	115	1.5× / 6
Exercises · Philippine Sea	9	67.8	0	—	1.7× / 5.4
Exercises · Aegean Seasurge	8	201.5	7	93	2.1× / 3.8
Exercises · Arabian Sea	8	125.3	1	39	0.9× / 8.8
Surveys · Mediterranean Sea - Eastern Basinsurge	8	72.3	2	66	2.5× / 3.2
Missiles · North Atlantic Ocean	8	51.8	2	32	0.8× / 10.4
Incidents · Coral Seasurge	8	1.2	0	—	2.1× / 3.8
Missiles · Black Seasurge	7	112.6	4	33	5.0× / 1.4
Incidents · North Pacific Ocean	7	60.4	1	50	0.3× / 26.8
Incidents · Indian Ocean	7	33.2	1	32	0.9× / 7.4
Incidents · Eastern China Seasurge	6	97.4	1	38	7.5× / 0.8
Incidents · Arabian Sea	6	90	4	43	1.7× / 3.6
Cable ops · North Atlantic Ocean	6	62.2	2	36	1.9× / 3.2
Incidents · Philippine Sea	6	45	0	—	1.8× / 3.4
Nav aids · Gulf of Mexico	5	73.3	5	153	1.9× / 2.6
Spills · North Atlantic Ocean	5	60	3	22	1.3× / 4
Incidents · North Atlantic Ocean	5	57.8	2	32	0.3× / 16.4
Incidents · South Atlantic Ocean	5	57.4	0	—	0.8× / 6
Missiles · North Pacific Oceanlong running	5	54.9	1	380	0.7× / 6.8
Incidents · South Pacific Ocean	5	41.4	2	23	0.7× / 7.2
Piracy · Gulf of Guinea	5	40.9	1	32	1.5× / 3.4
Incidents · Gulf of Thailandsurge	5	36.2	2	47	13× / 0.4
Quakes · North Pacific Ocean	5	15	0	—	1.0× / 5
Other · Coral Seasurge	5	6.1	0	—	8.3× / 0.6
Exercises · North Atlantic Ocean	4	71.3	2	81	0.9× / 4.4
Missiles · South Pacific Oceansurge	4	22.6	0	—	2.5× / 1.6
Quakes · Solomon Sea	4	10.5	1	29	1.0× / 4
Derelicts · South China Seasurge	4	7.3	0	—	6.7× / 0.6
Wrecks · South China Seasurge	3	361.5	9	213	3.0× / 1
Surveys · North Atlantic Oceanlong running	3	197.5	5	500	1.1× / 2.6
Nav aids · Philippine Seanew	3	76.2	3	25	new / 0
Cable ops · South Pacific Oceansurge	3	58.5	2	59	15× / 0.2
Spills · Gulf of Mexico	3	49	1	45	0.6× / 5
Nav aids · Inner Seas off the West Coast of Scotland	3	45.8	1	102	0.8× / 3.8
Incidents · Mediterranean Sea - Eastern Basin	3	36.9	2	48	0.2× / 17
Incidents · Caribbean Sea	3	33.9	0	—	0.6× / 5.2
Nav aids · English Channel	3	32.9	1	51	1.3× / 2.4
Exercises · Gulf of Mexicosurge	3	28.9	0	—	3.0× / 1
Derelicts · North Atlantic Ocean	3	25.1	1	140	0.7× / 4.4
Cable ops · Mediterranean Sea - Eastern Basin	3	25	0	—	1.7× / 1.8
Missiles · Japan Seasurge	3	24.2	1	18	2.5× / 1.2
Nav aids · Gulf of Alaska	3	20.6	1	17	1.7× / 1.8
Exercises · Yellow Sea	3	15.8	0	—	0.3× / 9.4
Exercises · Barentsz Seasurge	3	15.1	1	6	5.0× / 0.6
Quakes · North Atlantic Oceansurge	3	9	0	—	5.0× / 0.6
Derelicts · Caribbean Sea	3	8.7	1	26	1.9× / 1.6
Derelicts · Indian Oceansurge	3	8.3	0	—	2.5× / 1.2
Debris · Indian Oceansurge	3	7.5	1	25	3.8× / 0.8
Incidents · Timor Seasurge	3	2.3	0	—	15× / 0.2
Nav aids · Caribbean Sealong running	2	312.3	11	418	1.1× / 1.8
Nav aids · North Atlantic Ocean	2	254.6	8	143	0.7× / 2.8
Surveys · Persian Gulf	2	224.3	6	186	1.7× / 1.2
Surveys · Andaman or Burma Sea	2	132.1	3	59	2.5× / 0.8
Nav aids · South Pacific Ocean	2	90.6	2	146	1.0× / 2
Surveys · Bay of Bengal	2	85.8	2	58	1.1× / 1.8
Nav aids · Indian Ocean	2	52.9	1	67	1.3× / 1.6
Nav aids · Bass Strait	2	48.4	1	134	2.5× / 0.8
Missiles · Indian Ocean	2	38.6	0	—	1.0× / 2
Exercises · Laccadive Sea	2	36.3	1	33	0.8× / 2.4
Derelicts · South Pacific Ocean	2	35.2	2	90	0.9× / 2.2
Nav aids · Mozambique Channel	2	29	2	24	10× / 0.2
Cable ops · Persian Gulf	2	26.6	2	26	10× / 0.2
Incidents · Laccadive Sea	2	23.5	0	—	2.5× / 0.8
Surveys · Mediterranean Sea - Western Basin	2	22.6	2	18	10× / 0.2
Cable ops · South China Sea	2	13.5	1	26	1.4× / 1.4
Exercises · Andaman or Burma Sea	2	9.3	0	—	10× / 0.2
Nav aids · Bay of Bengal	2	6.6	1	23	1.7× / 1.2
Icebergs · Barentsz Seanew	2	6	0	—	new / 0
Derelicts · Laccadive Sea	2	6	0	—	2.5× / 0.8
Derelicts · Mozambique Channel	2	6	0	—	2.5× / 0.8
Containers · North Atlantic Ocean	2	6	0	—	2.0× / 1
Icebergs · North Atlantic Ocean	2	6	0	—	0.1× / 20.6
Quakes · Philippine Sea	2	6	0	—	2.0× / 1
Debris · South Atlantic Oceannew	2	6	0	—	new / 0
Surveys · Alboran Seanew	2	4.8	1	3	new / 0
Quakes · Indian Ocean	2	4.7	1	21	0.9× / 2.2
Incidents · Tasman Sea	2	3.1	0	—	1.4× / 1.4
Cable ops · Mediterranean Sea - Western Basin	2	2.2	0	—	5.0× / 0.4
Wrecks · Arabian Sea	1	118.6	3	106	5.0× / 0.2
Wrecks · Gulf of Mexicolong running	1	105.7	4	745	5.0× / 0.2
Nav aids · North Pacific Ocean	1	88	3	260	0.4× / 2.4
Nav aids · Mediterranean Sea - Western Basin	1	84.1	2	59	0.4× / 2.6
Wrecks · North Sea	1	70.1	3	69	1.3× / 0.8
Surveys · Black Sea	1	61.5	2	90	0.8× / 1.2
Ordnance · North Sea	1	58	0	—	1.3× / 0.8
Surveys · Bay of Biscay	1	44.4	2	41	5.0× / 0.2
Exercises · Japan Sea	1	40.9	1	53	1.3× / 0.8
Restricted · South Atlantic Ocean	1	36.2	1	89	1.7× / 0.6
Nav aids · Andaman or Burma Sea	1	35.1	1	121	1.0× / 1
Wrecks · Laccadive Sea	1	35	1	31	5.0× / 0.2
Exercises · Alboran Sea	1	32.5	1	60	1.7× / 0.6
Nav aids · Laccadive Sea	1	32.1	1	115	1.7× / 0.6
Wrecks · English Channel	1	31	1	54	1.7× / 0.6
Other · Irish Sea and St. George's Channel	1	30.2	1	30	5.0× / 0.2
Spills · Bering Sea	1	30	1	45	2.5× / 0.4
Surveys · Gulf of Aden	1	27.3	1	27	new / 0
Wrecks · Indian Ocean	1	27.1	1	346	5.0× / 0.2
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	26.2	1	26	1.0× / 1
Spills · Gulf of Alaska	1	26	0	—	new / 0
Cable ops · Arabian Sea	1	24	1	31	0.8× / 1.2
Surveys · South China Sea	1	22.2	1	45	1.3× / 0.8
Surveys · Bass Strait	1	18.6	1	55	new / 0
Derelicts · Java Sea	1	17.5	0	—	new / 0
Surveys · Caribbean Sealong running	1	16.2	1	808	0.8× / 1.2
Other · Greenland Sea	1	14.5	0	—	new / 0
Other · South Atlantic Ocean	1	13.9	0	—	new / 0
Other · Laccadive Sea	1	13.8	0	—	5.0× / 0.2
Surveys · Sea of Marmara	1	13.6	1	13	new / 0
Wrecks · South Atlantic Ocean	1	12.6	1	12	1.3× / 0.8
Missiles · Arctic Ocean	1	12.1	0	—	1.7× / 0.6
Debris · Mozambique Channel	1	11.5	1	11	new / 0
Surveys · Indian Ocean	1	9.9	0	—	1.0× / 1
Exercises · Caribbean Sea	1	9.6	0	—	0.5× / 2
Incidents · Gulf of Mexico	1	9.2	1	9	0.4× / 2.8
Incidents · Java Sea	1	9	0	—	1.0× / 1
Nav aids · Persian Gulf	1	7.3	1	7	new / 0
Wrecks · Java Sea	1	6.4	1	6	new / 0
Exercises · Red Sea	1	6.4	0	—	5.0× / 0.2
Piracy · Celebes Sea	1	6	0	—	5.0× / 0.2
Exercises · Sulu Sea	1	5.5	0	—	new / 0
Other · Indian Ocean	1	5.2	1	40	2.5× / 0.4
Missiles · Bay of Bengal	1	4.6	1	4	1.0× / 1
Cable ops · English Channel	1	3.9	1	3	5.0× / 0.2
Missiles · Laccadive Sea	1	3.9	0	—	0.8× / 1.2
Nav aids · Celtic Sea	1	3.4	1	3	0.7× / 1.4
Quakes · Bali Sea	1	3	0	—	5.0× / 0.2
Debris · Baltic Sea	1	3	0	—	new / 0
Derelicts · Bay of Bengal	1	3	0	—	0.7× / 1.4
Containers · Bay of Biscay	1	3	0	—	new / 0
Quakes · Bismarck Sea	1	3	0	—	1.0× / 1
Quakes · Celebes Sea	1	3	0	—	5.0× / 0.2
Quakes · Coral Sea	1	3	0	—	1.3× / 0.8
Debris · English Channel	1	3	0	—	2.5× / 0.4
Debris · Gulf of Mexico	1	3	0	—	1.3× / 0.8
Quakes · Gulf of Tomini	1	3	0	—	1.7× / 0.6
Containers · Ionian Sea	1	3	0	—	new / 0
Containers · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Derelicts · Mediterranean Sea - Western Basin	1	3	0	—	5.0× / 0.2
Quakes · Molukka Sea	1	3	0	—	1.3× / 0.8
Derelicts · North Pacific Ocean	1	3	0	—	0.4× / 2.8
Derelicts · North Sea	1	3	0	—	1.7× / 0.6
Derelicts · Persian Gulf	1	3	0	—	2.5× / 0.4
Quakes · South China Sea	1	3	0	—	new / 0
Derelicts · Tasman Sea	1	3	0	—	1.7× / 0.6
Debris · Timor Sea	1	3	0	—	new / 0
Exercises · Mediterranean Sea - Western Basin	1	2.6	0	—	2.5× / 0.4
Surveys · Celtic Sea	1	2.5	0	—	2.5× / 0.4
Debris · North Sea	1	2.2	1	2	new / 0
Derelicts · South Atlantic Ocean	1	1.8	0	—	0.6× / 1.6
Other · Gulf of Alaska	1	1.7	0	—	new / 0
Missiles · Gulf of Guinea	1	1.4	1	1	new / 0
Wrecks · Tasman Sea	1	1.4	0	—	new / 0
Surveys · Aegean Sea	1	1.2	0	—	1.3× / 0.8
Debris · South Pacific Ocean	1	1	0	—	1.3× / 0.8
Derelicts · Celtic Sea	1	0.5	0	—	new / 0
Other · Bismarck Sea	1	0.4	0	—	new / 0
Nav aids · Irish Sea and St. George's Channel	1	0.4	0	—	0.6× / 1.8
Nav aids · Bristol Channel	1	0.3	0	—	0.8× / 1.2
Cable ops · Strait of Gibraltar	1	0.1	0	—	new / 0
Wrecks · Caribbean Sealong running	0	494	13	804	0.0× / 0.8
Wrecks · North Atlantic Oceanlong running	0	197.6	5	790	0.0× / 0.2
Surveys · Arctic Oceanlong running	0	186	6	1,713	— / 0
Surveys · The Northwestern Passageslong running	0	186	6	604	— / 0
Other · Caribbean Sealong running	0	124	4	800	0.0× / 0.4
Wrecks · North Pacific Oceanlong running	0	89.3	1	653	— / 0
Exercises · South China Sea	0	85.3	0	—	0.0× / 2.8
Surveys · Bering Sealong running	0	69.7	2	628	— / 0
Surveys · Beaufort Sealong running	0	69.6	2	2,374	— / 0
Exercises · Ionian Sea	0	64.4	2	93	0.0× / 0.2
Wrecks · Bay of Bengal	0	62	2	65	— / 0
Surveys · Sea of Okhotsk	0	62	2	95	— / 0
Other · South China Sealong running	0	62	2	370	0.0× / 1.4
Wrecks · The Northwestern Passages	0	62	2	206	— / 0
Wrecks · Mediterranean Sea - Western Basin	0	38.6	1	117	— / 0
Cable ops · Adriatic Sea	0	31	1	32	— / 0
Missiles · Aegean Sea	0	31	1	93	0.0× / 0.2
Other · Arabian Sea	0	31	1	63	0.0× / 0.6
Restricted · Caribbean Sealong running	0	31	1	663	— / 0
Wrecks · Gulf of California	0	31	1	166	— / 0
Surveys · Gulf of Guinea	0	31	1	76	— / 0
Surveys · Gulf of Mexico	0	31	1	32	0.0× / 0.8
Other · Gulf of Thailandlong running	0	31	1	382	0.0× / 0.2
Wrecks · Kara Sea	0	31	1	51	— / 0
Surveys · Malacca Strait	0	31	1	32	— / 0

Cite: seahazards.com Sea Ledger, 2019-03, 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.