Sea Ledger, November 2019

2019-11-01 to 2019-11-30 · archive

issued: 712
warning-days in force: 10,707
in force at month end: 362
sea × type cells: 244

baseline: same month, previous 5 years (2018-11, 2017-11, 2016-11, 2015-11, 2014-11)

By type

type	issued	warning-days	in force at end
Exercises	195	1,506.6	54
Incidents	93	889	22
Icebergs	81	100.1	3
Surveys	66	2,179.9	79
Nav aids	51	2,210.7	74
Derelicts	38	275.8	7
Quakes	37	105.9	3
Missiles	33	273.8	11
Other	30	543.2	16
Cable ops	21	369	15
Debris	16	70.2	4
Spills	14	208.1	4
Wrecks	11	1,646.8	60
Ordnance	7	70	2
Containers	7	21	0
Piracy	6	37	1
Structures	4	71.4	3
Restricted	1	97.1	3
Storms	1	1.3	0
Volcanic	0	30	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 Basinsurgelong running	33	227.1	5	394	3.2× / 10.2
Exercises · North Pacific Ocean	30	124.8	4	38	1.5× / 19.8
Icebergs · South Atlantic Ocean	29	28.5	0	—	1.5× / 19.4
Exercises · Aegean Seasurge	26	246.2	10	337	3.7× / 7
Incidents · South China Sea	24	184.9	7	54	0.9× / 25.8
Exercises · Black Seasurge	23	295.9	12	92	4.4× / 5.2
Icebergs · Labrador Sea	18	21.6	2	31	0.9× / 20.2
Exercises · Bay of Bengal	16	112.2	6	33	1.4× / 11.4
Surveys · South Atlantic Ocean	15	248.9	13	121	1.5× / 10.2
Icebergs · Southern Ocean	15	15	0	—	1.6× / 9.4
Surveys · Persian Gulfsurge	14	348.5	13	186	23× / 0.6
Exercises · Arabian Sea	12	120.2	2	40	1.8× / 6.8
Exercises · Yellow Sea	12	56	2	36	1.4× / 8.8
Quakes · South Pacific Ocean	12	33.5	1	32	0.8× / 14.4
Nav aids · North Sea	11	86.9	4	33	0.8× / 13.8
Exercises · South Pacific Oceansurge	11	45	5	32	2.6× / 4.2
Icebergs · Davis Straitsurge	11	13.2	0	—	3.7× / 3
Derelicts · Indian Oceansurge	10	58.5	2	115	3.6× / 2.8
Debris · North Atlantic Oceansurge	10	50.3	3	43	10× / 1
Exercises · South Atlantic Ocean	10	34	4	29	0.7× / 15.2
Incidents · South Pacific Ocean	10	33.6	3	50	1.5× / 6.6
Nav aids · North Atlantic Oceansurge	9	209.1	7	355	2.3× / 4
Incidents · North Pacific Ocean	9	94.5	6	55	0.3× / 26.4
Surveys · North Atlantic Oceanlong running	8	534.9	18	744	1.5× / 5.4
Other · North Pacific Ocean	8	67.7	2	115	1.5× / 5.2
Quakes · Molukka Seasurge	8	21	0	—	3.6× / 2.2
Incidents · North Atlantic Ocean	7	152	3	78	0.4× / 18.4
Incidents · Coral Seasurge	7	16.7	0	—	2.5× / 2.8
Wrecks · South China Seasurge	6	575.6	23	327	6.0× / 1
Incidents · Laccadive Seasurge	6	104.9	2	53	4.3× / 1.4
Icebergs · Laptev Seasurge	6	17.6	1	19	30× / 0.2
Incidents · South Atlantic Ocean	6	16.2	1	25	1.0× / 6.2
Exercises · Philippine Sea	6	7.7	0	—	1.6× / 3.8
Surveys · Arabian Sea	5	162.6	5	51	1.0× / 4.8
Exercises · North Atlantic Ocean	5	72.7	1	92	1.0× / 5
Surveys · Bay of Bengalsurge	5	58.1	4	24	2.1× / 2.4
Missiles · Barentsz Sea	5	33.7	0	—	0.9× / 5.8
Missiles · North Atlantic Ocean	5	30.7	1	33	0.9× / 5.6
Cable ops · South Pacific Oceansurge	5	27.1	2	74	8.3× / 0.6
Missiles · Indian Ocean	5	18.4	1	25	1.7× / 3
Derelicts · Bay of Bengalsurge	5	15	0	—	2.8× / 1.8
Other · South Atlantic Oceansurge	5	13.2	1	24	8.3× / 0.6
Quakes · North Pacific Ocean	5	12.7	1	17	0.9× / 5.8
Incidents · Indian Ocean	5	7.9	0	—	1.6× / 3.2
Nav aids · South Atlantic Ocean	4	356.3	9	198	0.5× / 8.8
Surveys · Black Seasurge	4	134	4	87	6.7× / 0.6
Surveys · Mediterranean Sea - Eastern Basin	4	77.3	3	102	1.7× / 2.4
Spills · Gulf of Mexico	4	70	1	42	0.9× / 4.6
Spills · North Pacific Oceansurge	4	52	1	38	2.5× / 1.6
Missiles · Black Sea	4	45.2	3	36	0.9× / 4.6
Nav aids · Inner Seas off the West Coast of Scotland	4	36.4	1	58	1.3× / 3.2
Missiles · South Pacific Ocean	4	30.9	2	32	1.7× / 2.4
Piracy · Gulf of Guinea	4	28	0	—	0.9× / 4.4
Ordnance · North Pacific Oceansurge	4	10	0	—	20× / 0.2
Other · Mediterranean Sea - Eastern Basinsurge	4	9.1	0	—	20× / 0.2
Nav aids · Caribbean Seasurgelong running	3	170.9	7	662	2.5× / 1.2
Incidents · Arabian Sea	3	146.5	0	—	1.7× / 1.8
Missiles · North Pacific Ocean	3	44.8	1	79	0.5× / 6.4
Wrecks · Indian Oceannew	3	36.9	1	215	new / 0
Debris · Timor Sea	3	11.2	0	—	1.3× / 2.4
Incidents · Bismarck Seasurge	3	9.6	0	—	7.5× / 0.4
Containers · Bay of Bengalnew	3	9	0	—	new / 0
Derelicts · South Atlantic Oceansurge	3	6.6	0	—	2.5× / 1.2
Other · Caribbean Sealong running	2	140.5	5	1,044	3.3× / 0.6
Cable ops · North Pacific Ocean	2	89.5	3	50	2.0× / 1
Nav aids · English Channel	2	76.5	2	33	0.5× / 4.2
Cable ops · North Atlantic Ocean	2	65.3	3	99	0.5× / 4.2
Nav aids · Arabian Sea	2	55.3	3	242	1.4× / 1.4
Derelicts · South Pacific Ocean	2	49.4	1	30	0.9× / 2.2
Spills · North Atlantic Ocean	2	46	1	35	0.8× / 2.4
Missiles · Aegean Sea	2	42.7	1	337	2.5× / 0.8
Derelicts · North Pacific Ocean	2	36.1	1	61	1.0× / 2
Other · English Channel	2	32.9	0	—	5.0× / 0.4
Spills · The Coastal Waters of Southeast Alaska and British Columbianew	2	31	0	—	new / 0
Cable ops · Coral Seanew	2	30.6	1	35	new / 0
Cable ops · South China Sea	2	28.6	1	31	1.3× / 1.6
Incidents · Gulf of Thailand	2	14.1	0	—	0.8× / 2.4
Surveys · Andaman or Burma Sea	2	13.5	2	32	3.3× / 0.6
Cable ops · Tasman Seanew	2	13.5	1	13	new / 0
Exercises · Adriatic Sea	2	8	0	—	5.0× / 0.4
Quakes · Adriatic Seanew	2	6	0	—	new / 0
Quakes · Coral Sea	2	6	0	—	1.7× / 1.2
Derelicts · Japan Sea	2	6	0	—	5.0× / 0.4
Quakes · South Atlantic Ocean	2	6	0	—	0.8× / 2.4
Structures · South Atlantic Oceannew	2	5.8	0	—	new / 0
Ordnance · Laccadive Seanew	2	4.5	0	—	new / 0
Derelicts · Coral Sea	2	4.4	0	—	2.0× / 1
Derelicts · Mediterranean Sea - Western Basin	2	4.4	1	8	3.3× / 0.6
Derelicts · Laccadive Sea	2	4	1	4	3.3× / 0.6
Other · Hudson Baynew	2	3.9	0	—	new / 0
Nav aids · Davis Strait	2	0.1	0	—	2.0× / 1
Nav aids · South Pacific Oceanlong running	1	265.8	9	390	0.6× / 1.8
Wrecks · Caribbean Sealong running	1	217.6	8	1,034	1.3× / 0.8
Wrecks · North Atlantic Oceanlong running	1	185.4	7	758	1.3× / 0.8
Nav aids · North Pacific Ocean	1	182.7	6	277	0.3× / 4
Nav aids · Indian Ocean	1	62.2	2	240	0.7× / 1.4
Ordnance · North Sea	1	55.5	2	47	1.3× / 0.8
Other · South China Sealong running	1	52.8	2	526	1.0× / 1
Derelicts · Arabian Sea	1	42	0	—	2.5× / 0.4
Surveys · Barentsz Sea	1	39.8	0	—	0.8× / 1.2
Structures · South China Sealong running	1	35.6	2	565	new / 0
Nav aids · Gulf of Mexico	1	33.4	1	129	0.5× / 2.2
Nav aids · Aegean Sea	1	31.5	2	242	new / 0
Derelicts · South China Sea	1	31.4	1	144	1.0× / 1
Nav aids · Great Australian Bight	1	31	1	101	1.3× / 0.8
Nav aids · Bass Strait	1	30.7	1	248	0.4× / 2.4
Nav aids · Bristol Channel	1	30	1	54	5.0× / 0.2
Other · Inner Seas off the West Coast of Scotland	1	30	1	59	new / 0
Surveys · Java Sea	1	30	1	35	5.0× / 0.2
Structures · Sea of Okhotsk	1	30	1	44	new / 0
Surveys · Sea of Marmara	1	28.8	1	66	5.0× / 0.2
Cable ops · Caribbean Sea	1	27.4	1	27	1.7× / 0.6
Surveys · Coral Sea	1	25.8	1	25	new / 0
Exercises · Laccadive Sea	1	25.6	0	—	0.3× / 3.4
Exercises · Andaman or Burma Sea	1	24	0	—	2.5× / 0.4
Surveys · Caribbean Sea	1	22.6	1	22	1.3× / 0.8
Incidents · Singapore Strait	1	19.1	0	—	1.3× / 0.8
Incidents · Caribbean Sea	1	18.9	0	—	0.1× / 6.6
Incidents · Java Sea	1	18.9	0	—	0.6× / 1.6
Nav aids · Persian Gulf	1	17.4	1	17	new / 0
Surveys · Indian Ocean	1	16.9	1	40	0.5× / 2.2
Nav aids · Hudson Bay	1	15	0	—	2.5× / 0.4
Exercises · South China Sea	1	14.8	0	—	0.3× / 3.2
Cable ops · Philippine Sea	1	14.5	0	—	0.7× / 1.4
Incidents · Philippine Sea	1	14.1	0	—	0.2× / 4.2
Cable ops · Eastern China Sea	1	10.8	0	—	0.8× / 1.2
Cable ops · Aegean Sea	1	9.6	1	9	new / 0
Exercises · Persian Gulf	1	9.6	0	—	5.0× / 0.2
Cable ops · Malacca Strait	1	9.2	0	—	new / 0
Spills · Gulf of Alaska	1	9	1	9	2.5× / 0.4
Missiles · Greenland Sea	1	8.7	1	8	1.7× / 0.6
Missiles · Norwegian Sea	1	8.7	1	8	0.7× / 1.4
Exercises · Coral Sea	1	8.5	0	—	0.8× / 1.2
Incidents · Black Sea	1	7.3	0	—	new / 0
Incidents · Gulf of Guinea	1	7	0	—	5.0× / 0.2
Piracy · Red Sea	1	7	0	—	new / 0
Other · North Atlantic Ocean	1	6.7	0	—	0.8× / 1.2
Quakes · Philippine Sea	1	5.3	0	—	1.0× / 1
Nav aids · Celtic Sea	1	5.1	0	—	0.5× / 2.2
Missiles · Arctic Ocean	1	5	0	—	1.3× / 0.8
Exercises · Indian Ocean	1	4.9	0	—	0.3× / 3
Exercises · Barentsz Sea	1	4.5	0	—	1.7× / 0.6
Surveys · Aegean Sea	1	4.1	0	—	2.5× / 0.4
Missiles · Laccadive Sea	1	3.9	0	—	1.3× / 0.8
Exercises · Red Sea	1	3.6	1	3	new / 0
Other · Coral Sea	1	3.3	0	—	2.5× / 0.4
Surveys · Timor Sea	1	3.1	1	3	new / 0
Quakes · Arabian Sea	1	3	0	—	5.0× / 0.2
Debris · Bay of Bengal	1	3	0	—	new / 0
Derelicts · Caribbean Sea	1	3	0	—	0.6× / 1.8
Derelicts · Celtic Sea	1	3	0	—	5.0× / 0.2
Containers · English Channel	1	3	0	—	2.5× / 0.4
Derelicts · English Channel	1	3	0	—	1.7× / 0.6
Surveys · Great Australian Bight	1	3	0	—	5.0× / 0.2
Containers · Indian Ocean	1	3	0	—	new / 0
Debris · Indian Ocean	1	3	0	—	new / 0
Icebergs · Kara Sea	1	3	0	—	new / 0
Derelicts · Mediterranean Sea - Eastern Basin	1	3	0	—	1.7× / 0.6
Quakes · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Containers · North Atlantic Ocean	1	3	0	—	2.5× / 0.4
Derelicts · North Atlantic Ocean	1	3	0	—	0.2× / 4.2
Quakes · North Atlantic Ocean	1	3	0	—	1.3× / 0.8
Quakes · Sea of Okhotsk	1	3	0	—	1.7× / 0.6
Containers · South Atlantic Ocean	1	3	0	—	new / 0
Quakes · Southern Ocean	1	3	1	2	5.0× / 0.2
Derelicts · Timor Sea	1	3	0	—	new / 0
Incidents · Molukka Sea	1	2.9	0	—	1.7× / 0.6
Debris · Eastern China Sea	1	2.7	1	2	new / 0
Incidents · Mediterranean Sea - Western Basin	1	2.7	0	—	1.7× / 0.6
Other · Bering Sea	1	2.1	0	—	new / 0
Restricted · Philippine Sea	1	2.1	0	—	new / 0
Nav aids · Bay of Bengal	1	2	0	—	1.0× / 1
Piracy · Singapore Strait	1	2	1	1	5.0× / 0.2
Other · Aegean Sea	1	1.8	0	—	new / 0
Exercises · Gulf of Mexico	1	1.3	0	—	0.5× / 2.2
Storms · Philippine Sea	1	1.3	0	—	new / 0
Icebergs · Hudson Strait	1	1.2	0	—	0.2× / 5
Nav aids · The Northwestern Passages	1	1.2	0	—	new / 0
Missiles · Bay of Bengal	1	1.1	0	—	1.3× / 0.8
Incidents · Solomon Sea	1	1	0	—	1.7× / 0.6
Nav aids · Ionian Sea	1	0.6	0	—	2.5× / 0.4
Incidents · Great Australian Bight	1	0.4	0	—	1.7× / 0.6
Other · South Pacific Ocean	1	0.2	0	—	5.0× / 0.2
Spills · Arabian Sea	1	0.1	0	—	new / 0
Incidents · Timor Sea	1	0.1	0	—	1.3× / 0.8
Cable ops · Mediterranean Sea - Western Basin	1	0	1	0	2.5× / 0.4
Nav aids · Mozambique Channel	0	120	4	268	0.0× / 0.6
Wrecks · North Pacific Oceanlong running	0	120	4	897	0.0× / 0.6
Surveys · South China Sea	0	108.7	3	88	0.0× / 0.4
Wrecks · Arabian Sea	0	90.7	3	306	0.0× / 0.2
Nav aids · Philippine Sea	0	90	3	269	— / 0
Surveys · Sea of Okhotsk	0	64	1	46	0.0× / 0.6
Other · Arabian Sea	0	60	2	307	0.0× / 0.4
Nav aids · Coral Sea	0	60	2	158	0.0× / 4.2
Wrecks · Gulf of Mexicolong running	0	60	2	989	0.0× / 0.4
Exercises · Ionian Sea	0	60	2	337	0.0× / 0.2
Wrecks · Laccadive Sea	0	60	2	88	— / 0
Nav aids · Mediterranean Sea - Eastern Basin	0	60	2	150	0.0× / 0.8
Surveys · Arctic Ocean	0	34.6	1	116	0.0× / 0.6
Restricted · South Atlantic Ocean	0	30.9	1	333	0.0× / 0.4

Cite: seahazards.com Sea Ledger, 2019-11, 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.