Sea Ledger, February 2020

2020-02-01 to 2020-02-29 · archive

issued: 744
warning-days in force: 10,611
in force at month end: 372
sea × type cells: 235

baseline: same month, previous 5 years (2019-02, 2018-02, 2017-02, 2016-02, 2015-02)

By type

type	issued	warning-days	in force at end
Exercises	233	1,824.3	60
Surveys	97	2,174.8	86
Incidents	91	717.6	25
Icebergs	87	95.9	4
Nav aids	57	2,122.9	79
Derelicts	32	157.7	5
Missiles	31	450.6	12
Debris	26	82.8	2
Quakes	20	66.5	2
Other	19	362.9	15
Cable ops	14	332.8	11
Spills	14	232	5
Wrecks	7	1,607.1	54
Ordnance	4	71.7	2
Mines	3	17.3	1
Piracy	3	21	0
Containers	3	9	0
Structures	2	64.8	2
Volcanic	1	83.5	3
Restricted	0	87	3
Storms	0	29	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Exercises · Mediterranean Sea - Eastern Basinsurge	65	355.8	6	58	7.2× / 9
Exercises · Aegean Seasurge	31	432.5	12	61	6.0× / 5.2
Icebergs · Southern Ocean	31	32.3	1	28	1.7× / 17.8
Icebergs · Labrador Sea	29	34	2	30	1.1× / 26.6
Incidents · South China Sea	26	126.2	7	43	1.0× / 25
Surveys · South Atlantic Ocean	25	296.3	15	120	1.6× / 16
Icebergs · South Atlantic Oceansurge	25	23.6	1	28	2.5× / 9.8
Exercises · Black Seasurge	22	295.6	13	93	2.2× / 9.8
Exercises · South Pacific Oceansurge	22	54.8	5	28	5.8× / 3.8
Exercises · North Pacific Ocean	20	127.6	6	64	0.9× / 22.2
Exercises · Mediterranean Sea - Western Basinsurge	15	114.2	4	58	75× / 0.2
Surveys · North Atlantic Oceansurgelong running	14	353.7	16	835	3.7× / 3.8
Nav aids · North Sea	13	81.4	4	40	0.9× / 14.6
Incidents · North Pacific Ocean	12	130.6	7	36	0.6× / 20.8
Exercises · Arabian Sea	12	99.1	2	32	1.8× / 6.6
Surveys · Indian Oceansurge	11	161.6	4	86	11× / 1
Incidents · South Atlantic Ocean	11	39.4	1	30	1.6× / 6.8
Debris · Celtic Seasurge	10	16.6	0	—	50× / 0.2
Exercises · Yellow Sea	9	48.2	1	29	1.2× / 7.6
Surveys · Persian Gulfsurge	8	243.3	7	277	10× / 0.8
Exercises · North Atlantic Ocean	8	50.8	1	31	1.1× / 7
Derelicts · North Atlantic Ocean	8	31	0	—	0.8× / 9.8
Surveys · Great Australian Bightsurge	8	29.5	2	44	40× / 0.2
Surveys · Arabian Sea	7	201.5	8	124	1.6× / 4.4
Missiles · North Atlantic Ocean	7	29.3	1	24	1.3× / 5.4
Nav aids · South Pacific Oceansurgelong running	6	224.9	8	481	3.3× / 1.8
Spills · Gulf of Mexico	6	99	1	37	1.3× / 4.6
Incidents · South Pacific Ocean	6	56.4	1	29	1.1× / 5.4
Exercises · Bay of Bengal	6	39	1	22	0.7× / 9
Quakes · South Pacific Ocean	6	19.3	1	29	0.9× / 6.8
Derelicts · South Atlantic Oceansurge	6	13.8	1	17	3.3× / 1.8
Missiles · Black Sea	5	176.6	3	30	1.3× / 3.8
Nav aids · South Atlantic Ocean	5	157.6	6	141	0.6× / 8.4
Nav aids · Indian Oceansurge	5	114.2	4	331	3.6× / 1.4
Incidents · Arabian Sea	5	41.2	2	42	1.1× / 4.6
Derelicts · Indian Oceansurge	5	15	0	—	2.3× / 2.2
Debris · English Channelsurge	5	12.2	0	—	13× / 0.4
Nav aids · Caribbean Sealong running	4	392.3	14	753	1.8× / 2.2
Incidents · North Atlantic Ocean	4	122.1	2	169	0.3× / 14.4
Surveys · Bass Straitsurge	4	44.9	2	58	10× / 0.4
Missiles · Barentsz Sea	4	42	1	33	1.7× / 2.4
Missiles · Japan Seasurge	4	39.7	1	30	4.0× / 1
Wrecks · South Atlantic Oceansurge	4	35.2	2	72	20× / 0.2
Exercises · South Atlantic Ocean	4	23.1	1	33	0.6× / 6.8
Incidents · Coral Sea	4	16.6	0	—	0.7× / 6.2
Exercises · Andaman or Burma Seasurge	4	15.4	0	—	20× / 0.2
Exercises · Philippine Sea	4	15.1	0	—	0.9× / 4.4
Nav aids · Coral Sea	3	72.7	3	249	1.7× / 1.8
Missiles · North Pacific Ocean	3	67.6	2	170	0.8× / 3.8
Spills · North Pacific Oceansurge	3	64	2	42	2.5× / 1.2
Nav aids · Inner Seas off the West Coast of Scotland	3	59.8	3	79	1.1× / 2.8
Spills · North Atlantic Ocean	3	45	1	34	1.1× / 2.6
Other · English Channelsurge	3	42.5	2	22	3.0× / 1
Exercises · Caribbean Seasurge	3	12.8	1	29	3.8× / 0.8
Nav aids · Arafura Seasurge	3	11.8	0	—	7.5× / 0.4
Ordnance · North Pacific Oceannew	3	10.7	0	—	new / 0
Debris · South Pacific Oceannew	3	9	0	—	new / 0
Other · Gulf of Alaskanew	3	5.1	0	—	new / 0
Derelicts · South Pacific Ocean	3	5.1	0	—	1.1× / 2.8
Incidents · Solomon Seasurge	3	2.4	0	—	3.0× / 1
Surveys · Mediterranean Sea - Eastern Basin	2	120.6	4	106	1.0× / 2
Nav aids · Arabian Sea	2	66.8	3	333	3.3× / 0.6
Cable ops · North Atlantic Ocean	2	60.8	2	40	1.1× / 1.8
Cable ops · South Pacific Ocean	2	49.8	1	40	1.7× / 1.2
Surveys · South Pacific Oceannew	2	46.5	3	150	new / 0
Incidents · Indian Ocean	2	41.6	0	—	0.4× / 4.6
Surveys · Andaman or Burma Sea	2	37.5	2	19	2.5× / 0.8
Missiles · South Pacific Ocean	2	33.7	1	35	1.7× / 1.2
Cable ops · Arabian Sea	2	29.5	1	35	0.8× / 2.6
Exercises · Laccadive Sea	2	29.3	1	29	0.9× / 2.2
Incidents · Bay of Bengal	2	28.2	2	34	5.0× / 0.4
Debris · North Atlantic Ocean	2	27.2	1	50	2.5× / 0.8
Spills · The Coastal Waters of Southeast Alaska and British Columbia	2	24	1	23	1.1× / 1.8
Incidents · Java Sea	2	18.8	1	37	2.5× / 0.8
Cable ops · Philippine Sea	2	18.4	1	68	2.0× / 1
Nav aids · Tasman Sea	2	16	0	—	0.7× / 2.8
Nav aids · English Channel	2	14.8	0	—	1.1× / 1.8
Piracy · Gulf of Guinea	2	14	0	—	0.5× / 4
Cable ops · Bristol Channelnew	2	11.5	0	—	new / 0
Surveys · Timor Seanew	2	9	1	9	new / 0
Structures · South Atlantic Ocean	2	6.8	0	—	10× / 0.2
Quakes · Ceram Sea	2	6	0	—	10× / 0.2
Debris · Mediterranean Sea - Eastern Basinnew	2	6	0	—	new / 0
Quakes · North Pacific Ocean	2	6	0	—	0.4× / 5
Quakes · South Atlantic Ocean	2	6	0	—	2.5× / 0.8
Other · North Atlantic Ocean	2	5.9	2	4	1.7× / 1.2
Derelicts · Laccadive Sea	2	5.4	1	30	2.5× / 0.8
Quakes · Philippine Sea	2	5.2	1	23	1.0× / 2
Mines · Red Seanew	2	4.5	1	14	new / 0
Derelicts · Mediterranean Sea - Western Basin	2	3.4	1	3	3.3× / 0.6
Other · Coral Sea	2	3	0	—	3.3× / 0.6
Other · The Coastal Waters of Southeast Alaska and British Columbianew	2	2.5	0	—	new / 0
Nav aids · Celtic Sea	2	2.2	1	27	1.0× / 2
Surveys · Ionian Sea	2	1.9	0	—	10× / 0.2
Incidents · Arafura Seanew	2	0.6	0	—	new / 0
Incidents · Banda Sea	2	0.5	0	—	10× / 0.2
Surveys · Tyrrhenian Seanew	2	0.4	1	0	new / 0
Nav aids · North Atlantic Ocean	1	169	6	203	0.2× / 4.2
Surveys · South China Sea	1	99.5	3	179	2.5× / 0.4
Nav aids · Gulf of Mexico	1	88.2	3	37	0.4× / 2.8
Surveys · Bay of Bengal	1	81.6	2	60	0.3× / 3
Nav aids · Bering Sea	1	58.2	2	39	new / 0
Surveys · Tasman Sea	1	56.3	2	87	2.5× / 0.4
Volcanic · Philippine Sea	1	54.5	2	75	2.5× / 0.4
Wrecks · South Pacific Ocean	1	45.1	2	30	1.0× / 1
Surveys · Mediterranean Sea - Western Basin	1	42.5	2	143	new / 0
Nav aids · Mozambique Channel	1	34.5	2	278	new / 0
Wrecks · North Sea	1	34	1	157	0.6× / 1.6
Derelicts · Arabian Sea	1	33.4	1	36	1.3× / 0.8
Surveys · Laccadive Sea	1	22.3	1	22	2.5× / 0.4
Incidents · Ionian Sea	1	20.2	0	—	new / 0
Incidents · Gulf of Aden	1	20	0	—	new / 0
Surveys · Aegean Sea	1	18.4	1	18	0.8× / 1.2
Other · Barentsz Sea	1	18.3	1	18	new / 0
Surveys · Balearic (Iberian Sea)	1	16.5	0	—	new / 0
Cable ops · South China Sea	1	14.3	1	14	0.5× / 2
Incidents · Bismarck Sea	1	14.2	0	—	0.4× / 2.6
Mines · South Atlantic Ocean	1	12.8	0	—	new / 0
Incidents · Laccadive Sea	1	11.9	1	39	0.4× / 2.4
Other · Java Sea	1	10.5	1	10	new / 0
Exercises · Gulf of Oman	1	8.8	0	—	new / 0
Missiles · Arctic Ocean	1	8.3	0	—	2.5× / 0.4
Incidents · Gulf of Mexico	1	7.7	1	7	0.3× / 3.6
Piracy · Singapore Strait	1	7	0	—	new / 0
Other · Bay of Bengal	1	6.9	0	—	5.0× / 0.2
Cable ops · Gulf of Guinea	1	5.1	0	—	1.7× / 0.6
Missiles · Norwegian Sea	1	5	0	—	1.0× / 1
Quakes · Bismarck Sea	1	4.9	0	—	5.0× / 0.2
Missiles · Laccadive Sea	1	4.9	0	—	1.0× / 1
Cable ops · Tasman Sea	1	4.8	1	4	1.7× / 0.6
Cable ops · Bismarck Sea	1	4.7	1	4	new / 0
Missiles · Arabian Sea	1	4.5	1	4	5.0× / 0.2
Incidents · Gulf of Thailand	1	4	0	—	1.0× / 1
Incidents · Black Sea	1	3.8	0	—	new / 0
Quakes · Solomon Sea	1	3.6	0	—	2.5× / 0.4
Exercises · Gulf of Guinea	1	3.3	0	—	new / 0
Quakes · Arctic Ocean	1	3	0	—	5.0× / 0.2
Quakes · Banda Sea	1	3	0	—	5.0× / 0.2
Icebergs · Barentsz Sea	1	3	0	—	2.5× / 0.4
Derelicts · Bass Strait	1	3	0	—	5.0× / 0.2
Derelicts · Caribbean Sea	1	3	0	—	0.5× / 2
Containers · Celtic Sea	1	3	0	—	new / 0
Containers · English Channel	1	3	0	—	new / 0
Other · Japan Sea	1	3	0	—	5.0× / 0.2
Quakes · Java Sea	1	3	0	—	new / 0
Icebergs · Kara Sea	1	3	0	—	5.0× / 0.2
Ordnance · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Incidents · Mediterranean Sea - Eastern Basin	1	3	0	—	0.1× / 12.4
Derelicts · Mozambique Channel	1	3	0	—	new / 0
Containers · North Atlantic Ocean	1	3	0	—	5.0× / 0.2
Derelicts · North Sea	1	3	0	—	5.0× / 0.2
Debris · Norwegian Sea	1	3	0	—	new / 0
Debris · Sea of Okhotsk	1	3	0	—	new / 0
Quakes · Sea of Okhotsk	1	3	0	—	new / 0
Debris · Tasman Sea	1	3	0	—	2.5× / 0.4
Derelicts · Tasman Sea	1	3	0	—	0.8× / 1.2
Exercises · Tyrrhenian Sea	1	2.9	1	2	new / 0
Debris · Indian Ocean	1	2.8	1	31	1.7× / 0.6
Nav aids · Bay of Bengal	1	2.7	0	—	0.8× / 1.2
Missiles · Philippine Sea	1	2.6	0	—	1.7× / 0.6
Other · Mediterranean Sea - Eastern Basin	1	2.4	0	—	1.7× / 0.6
Nav aids · Norwegian Sea	1	2.1	1	2	2.5× / 0.4
Surveys · North Sea	1	2	1	1	0.6× / 1.8
Exercises · Coral Sea	1	1.8	0	—	5.0× / 0.2
Exercises · Sulu Sea	1	1.5	1	1	new / 0
Other · Bering Sea	1	1.3	0	—	new / 0
Exercises · Red Sea	1	1.3	1	1	new / 0
Incidents · Bass Strait	1	1.1	0	—	new / 0
Nav aids · Gulf of Alaska	1	1.1	0	—	0.8× / 1.2
Missiles · Bay of Bengal	1	0.5	1	0	2.5× / 0.4
Incidents · Malacca Strait	1	0.5	0	—	new / 0
Other · South China Sea	1	0.5	0	—	1.7× / 0.6
Wrecks · Kara Sea	1	0.3	0	—	5.0× / 0.2
Wrecks · South China Sealong running	0	513.6	17	418	0.0× / 1.2
Wrecks · Caribbean Sealong running	0	232	8	1,125	0.0× / 2
Wrecks · North Atlantic Oceanlong running	0	194.6	6	849	— / 0
Other · Caribbean Sealong running	0	174	6	1,135	0.0× / 1
Nav aids · North Pacific Oceanlong running	0	116	4	368	0.0× / 2.6
Wrecks · North Pacific Oceanlong running	0	116	4	988	— / 0
Wrecks · Persian Gulf	0	100.4	3	241	— / 0
Exercises · Ionian Sea	0	87	3	61	0.0× / 1
Nav aids · Philippine Sea	0	87	3	360	— / 0
Other · Arabian Sealong running	0	58	2	398	0.0× / 0.4
Nav aids · Bass Strait	0	58	2	339	0.0× / 1.4
Surveys · Caribbean Sea	0	58	2	113	0.0× / 0.2
Nav aids · Great Australian Bight	0	58	2	192	0.0× / 0.6
Wrecks · Gulf of Mexicolong running	0	58	2	1,080	— / 0
Ordnance · North Sea	0	58	2	138	0.0× / 1.8
Restricted · Persian Gulf	0	58	2	318	0.0× / 0.2
Cable ops · South Atlantic Ocean	0	47.5	1	82	0.0× / 1.6
Wrecks · Arabian Sea	0	45.9	1	158	0.0× / 1.8
Cable ops · Aegean Sea	0	29	1	100	0.0× / 0.2
Nav aids · Aegean Sea	0	29	1	333	— / 0
Missiles · Aegean Sea	0	29	1	60	— / 0
Nav aids · Andaman or Burma Sea	0	29	1	275	0.0× / 0.2
Surveys · Arctic Ocean	0	29	1	142	— / 0
Surveys · Beaufort Sea	0	29	1	87	— / 0
Surveys · Bering Sea	0	29	1	174	— / 0
Other · Black Sea	0	29	1	123	— / 0
Wrecks · Great Australian Bight	0	29	1	264	— / 0

Cite: seahazards.com Sea Ledger, 2020-02, 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.