Sea Ledger, July 2019

2019-07-01 to 2019-07-31 · archive

issued: 724
warning-days in force: 11,594
in force at month end: 375
sea × type cells: 244

baseline: same month, previous 5 years (2018-07, 2017-07, 2016-07, 2015-07, 2014-07)

By type

type	issued	warning-days	in force at end
Exercises	150	1,437.4	40
Incidents	136	1,280	45
Icebergs	84	96.4	4
Surveys	77	2,250.9	72
Nav aids	58	2,918.6	92
Other	44	504	17
Quakes	44	129.5	3
Missiles	41	348.7	9
Derelicts	21	145.5	7
Cable ops	20	267.9	9
Spills	14	198	9
Wrecks	12	1,762.6	62
Debris	11	30.8	2
Piracy	4	28	0
Storms	3	5	0
Restricted	2	107.4	3
Containers	2	6	0
Ordnance	1	36.5	0
Structures	0	40.7	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · South Atlantic Oceansurge	37	37.1	1	31	2.9× / 12.8
Exercises · Mediterranean Sea - Eastern Basinsurge	36	238.9	7	272	6.0× / 6
Other · North Pacific Oceansurge	32	56.5	1	31	23× / 1.4
Exercises · Black Sea	30	357.5	5	53	1.7× / 18
Incidents · South China Sea	29	274.6	10	46	1.2× / 24
Icebergs · Labrador Sea	27	33.5	0	—	1.0× / 27.8
Surveys · South Atlantic Oceansurge	26	609.3	13	224	3.9× / 6.6
Incidents · North Pacific Ocean	20	211.7	6	40	0.7× / 27.2
Incidents · North Atlantic Ocean	19	219.8	8	43	1.2× / 15.8
Exercises · North Pacific Ocean	18	190.4	8	65	0.9× / 19.6
Incidents · South Atlantic Oceansurge	16	28.7	3	41	2.2× / 7.2
Icebergs · Southern Ocean	15	14.4	1	20	1.7× / 9
Surveys · North Atlantic Oceansurgelong running	13	439.4	18	622	2.8× / 4.6
Missiles · South Pacific Oceansurge	12	30.8	0	—	6.0× / 2
Quakes · South Pacific Ocean	11	33	0	—	1.1× / 10.2
Exercises · Philippine Seasurge	10	10.4	1	29	2.9× / 3.4
Incidents · Caribbean Sea	9	141.2	3	40	1.6× / 5.8
Spills · Gulf of Mexico	9	126	5	43	1.7× / 5.2
Nav aids · South Atlantic Ocean	8	688.4	17	203	1.8× / 4.4
Quakes · North Pacific Ocean	8	20.9	2	27	1.4× / 5.6
Nav aids · North Sea	7	187.4	6	188	0.7× / 9.8
Nav aids · North Pacific Oceansurgelong running	7	134.8	4	382	2.3× / 3
Exercises · South Pacific Oceansurge	7	33.2	1	18	2.5× / 2.8
Exercises · Yellow Sea	7	29.8	1	30	0.6× / 12.6
Nav aids · Gulf of Mexico	6	184.9	6	275	1.9× / 3.2
Incidents · South Pacific Ocean	6	60.5	1	36	0.8× / 8
Exercises · South Atlantic Ocean	6	41.2	2	27	0.9× / 7
Exercises · Bay of Bengal	6	33.3	1	23	1.1× / 5.2
Missiles · North Atlantic Ocean	6	20.8	1	34	1.0× / 6.2
Quakes · Molukka Seasurge	6	18	0	—	30× / 0.2
Nav aids · South Pacific Ocean	5	240.1	7	268	1.5× / 3.4
Missiles · North Pacific Oceanlong running	5	60.2	1	502	1.0× / 5.2
Nav aids · Coral Seasurge	5	49.1	1	36	2.3× / 2.2
Surveys · Aegean Seasurge	5	23	0	—	5.0× / 1
Cable ops · Celtic Seasurge	5	19.5	0	—	8.3× / 0.6
Cable ops · Coral Seanew	5	15.3	0	—	new / 0
Incidents · Coral Sea	5	13.2	1	36	1.0× / 5
Nav aids · North Atlantic Ocean	4	362.6	12	265	0.6× / 6.4
Surveys · Sea of Okhotsksurge	4	160.8	7	194	2.5× / 1.6
Missiles · Black Sea	4	130.6	4	34	1.8× / 2.2
Surveys · Norwegian Sea	4	122.8	5	93	1.3× / 3
Surveys · Kara Sea	4	80.7	4	33	1.8× / 2.2
Surveys · Black Seasurge	4	43.6	1	55	2.5× / 1.6
Incidents · Gulf of Mexico	4	38.6	2	34	0.7× / 6.2
Missiles · Japan Seasurge	4	28.2	1	30	5.0× / 0.8
Incidents · Indian Ocean	4	16	0	—	0.7× / 6.2
Quakes · Philippine Seasurge	4	12.7	0	—	2.5× / 1.6
Quakes · Indian Ocean	4	12	0	—	1.7× / 2.4
Exercises · South China Sea	4	10.5	0	—	0.8× / 4.8
Other · The Northwestern Passagessurge	4	4.1	0	—	4.0× / 1
Wrecks · South China Seasurge	3	437.6	16	205	2.5× / 1.2
Exercises · Arabian Sea	3	73.5	1	33	1.4× / 2.2
Nav aids · Inner Seas off the West Coast of Scotland	3	72.2	4	45	0.8× / 3.8
Surveys · North Sea	3	58.2	3	69	0.9× / 3.2
Derelicts · South China Sea	3	56.3	2	29	1.7× / 1.8
Spills · The Coastal Waters of Southeast Alaska and British Columbiasurge	3	31	3	33	3.0× / 1
Incidents · Molukka Seanew	3	22.1	2	23	new / 0
Missiles · Barentsz Seasurge	3	14.8	0	—	2.1× / 1.4
Cable ops · Labrador Seanew	3	14.2	0	—	new / 0
Exercises · North Atlantic Ocean	3	13.7	0	—	0.6× / 4.8
Exercises · Barentsz Seasurge	3	12.2	0	—	7.5× / 0.4
Missiles · Indian Oceansurge	3	11.8	0	—	3.0× / 1
Exercises · Gulf of Mexico	3	9.7	0	—	1.3× / 2.4
Derelicts · Indian Ocean	3	9	0	—	1.1× / 2.8
Quakes · Solomon Sea	3	9	0	—	1.7× / 1.8
Derelicts · North Atlantic Ocean	3	7.9	2	5	1.1× / 2.8
Quakes · Coral Sea	3	7.1	1	33	1.1× / 2.8
Storms · Gulf of Mexiconew	3	5	0	—	new / 0
Icebergs · Davis Straitsurge	3	2.5	2	2	7.5× / 0.4
Exercises · Aegean Sea	2	188.4	6	215	2.0× / 1
Wrecks · North Sea	2	171.6	6	177	2.0× / 1
Surveys · Persian Gulf	2	135.1	5	107	10× / 0.2
Surveys · Mediterranean Sea - Eastern Basin	2	132.6	3	92	1.3× / 1.6
Surveys · Sea of Marmara	2	68	1	111	10× / 0.2
Cable ops · North Atlantic Ocean	2	31	1	34	0.2× / 9
Incidents · Laccadive Sea	2	29	2	16	1.7× / 1.2
Incidents · Davis Strait	2	15.4	0	—	0.6× / 3.2
Piracy · Gulf of Guinea	2	14	0	—	1.4× / 1.4
Exercises · Andaman or Burma Sea	2	10.5	1	14	5.0× / 0.4
Incidents · Java Sea	2	7.4	1	15	2.5× / 0.8
Exercises · Caribbean Sea	2	7.2	0	—	1.7× / 1.2
Exercises · Red Seanew	2	7	0	—	new / 0
Debris · Caribbean Sea	2	6	0	—	10× / 0.2
Debris · Indian Ocean	2	6	0	—	2.0× / 1
Debris · South Atlantic Oceannew	2	6	0	—	new / 0
Quakes · South China Seanew	2	6	0	—	new / 0
Debris · South Pacific Ocean	2	6	0	—	2.5× / 0.8
Incidents · Bismarck Sea	2	4.2	0	—	1.4× / 1.4
Debris · Andaman or Burma Seanew	2	3.8	2	2	new / 0
Exercises · Bering Sea	2	2.3	0	—	1.3× / 1.6
Derelicts · Timor Sea	2	1.7	1	1	2.0× / 1
Nav aids · Mozambique Channel	1	94.2	4	146	new / 0
Wrecks · Arabian Sea	1	84.3	3	184	2.5× / 0.4
Nav aids · Andaman or Burma Sea	1	64	3	96	1.3× / 0.8
Wrecks · North Pacific Oceanlong running	1	63.6	3	775	new / 0
Restricted · Persian Gulf	1	62	2	105	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	52	2	181	1.7× / 0.6
Nav aids · Indian Ocean	1	51.8	2	118	0.3× / 3.2
Other · North Sea	1	50.1	1	36	0.4× / 2.6
Other · Irish Sea and St. George's Channel	1	34	1	152	2.5× / 0.4
Exercises · Laccadive Sea	1	32.2	1	32	0.6× / 1.8
Nav aids · Arabian Sea	1	32.1	1	120	1.0× / 1
Surveys · Bay of Bengal	1	29.3	1	36	1.0× / 1
Nav aids · Mediterranean Sea - Eastern Basin	1	28.6	1	28	new / 0
Incidents · Mediterranean Sea - Eastern Basin	1	28.5	0	—	0.1× / 15.8
Wrecks · Persian Gulf	1	28.3	1	28	5.0× / 0.2
Surveys · Gulf of Thailand	1	23.8	0	—	new / 0
Spills · North Pacific Ocean	1	23	1	40	0.4× / 2.8
Wrecks · Sea of Okhotsk	1	20.6	1	20	new / 0
Surveys · Mozambique Channel	1	20.2	1	20	new / 0
Surveys · North Pacific Ocean	1	20.2	0	—	1.7× / 0.6
Surveys · Barentsz Sea	1	19.6	1	19	0.5× / 2
Wrecks · Coral Sea	1	19.5	1	19	new / 0
Incidents · Gulf of Guinea	1	17.2	0	—	5.0× / 0.2
Incidents · Malacca Strait	1	15.8	1	15	new / 0
Incidents · Tyrrhenian Sea	1	15.8	1	34	2.5× / 0.4
Incidents · Baffin Bay	1	15.7	1	15	1.7× / 0.6
Incidents · Bali Sea	1	14.7	1	14	5.0× / 0.2
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	14.7	1	14	1.3× / 0.8
Restricted · Black Sea	1	14.4	0	—	1.0× / 1
Spills · Gulf of Alaska	1	14	0	—	1.3× / 0.8
Nav aids · Kara Sea	1	13.5	1	13	2.5× / 0.4
Wrecks · Andaman or Burma Sea	1	12.5	1	12	new / 0
Other · Laccadive Sea	1	12.4	1	12	new / 0
Incidents · English Channel	1	10.2	1	10	new / 0
Other · Mozambique Channel	1	9.5	1	9	new / 0
Missiles · Greenland Sea	1	9.1	0	—	new / 0
Surveys · Labrador Sea	1	8.6	1	8	5.0× / 0.2
Exercises · Sea of Marmara	1	7.6	1	7	new / 0
Other · Sea of Okhotsk	1	7.6	1	7	5.0× / 0.2
Exercises · Sulu Sea	1	7.5	1	7	new / 0
Piracy · Red Sea	1	7	0	—	1.7× / 0.6
Piracy · South China Sea	1	7	0	—	1.3× / 0.8
Ordnance · Tasman Sea	1	6	0	—	new / 0
Nav aids · Gulf of Alaska	1	5.7	0	—	0.4× / 2.4
Exercises · Japan Sea	1	5.5	1	5	5.0× / 0.2
Cable ops · South Atlantic Ocean	1	5.3	1	5	0.7× / 1.4
Cable ops · Solomon Sea	1	5	0	—	new / 0
Nav aids · Celtic Sea	1	4.9	0	—	0.8× / 1.2
Missiles · Laccadive Sea	1	4.9	0	—	1.0× / 1
Surveys · South Pacific Ocean	1	4.7	1	4	5.0× / 0.2
Incidents · Ligurian Sea	1	4.6	1	4	new / 0
Missiles · Bay of Bengal	1	4	0	—	5.0× / 0.2
Surveys · Bass Strait	1	3.4	1	3	5.0× / 0.2
Cable ops · Bismarck Sea	1	3.4	1	3	new / 0
Containers · Bay of Bengal	1	3	0	—	1.7× / 0.6
Derelicts · Caribbean Sea	1	3	0	—	1.3× / 0.8
Quakes · Eastern China Sea	1	3	0	—	new / 0
Derelicts · Java Sea	1	3	0	—	new / 0
Icebergs · Kara Sea	1	3	0	—	5.0× / 0.2
Containers · Mediterranean Sea - Eastern Basin	1	3	0	—	new / 0
Derelicts · Mediterranean Sea - Western Basin	1	3	0	—	2.5× / 0.4
Derelicts · Molukka Sea	1	3	1	2	new / 0
Derelicts · Mozambique Channel	1	3	0	—	2.5× / 0.4
Incidents · Mozambique Channel	1	3	0	—	0.7× / 1.4
Debris · North Atlantic Ocean	1	3	0	—	1.7× / 0.6
Derelicts · North Pacific Ocean	1	3	0	—	1.0× / 1
Icebergs · Norwegian Sea	1	3	0	—	new / 0
Derelicts · Philippine Sea	1	3	0	—	2.5× / 0.4
Quakes · Sea of Okhotsk	1	3	0	—	2.5× / 0.4
Derelicts · South Atlantic Ocean	1	3	0	—	0.6× / 1.6
Other · South Atlantic Ocean	1	3	0	—	1.3× / 0.8
Quakes · Southern Ocean	1	3	0	—	1.3× / 0.8
Derelicts · Tasman Sea	1	3	0	—	new / 0
Nav aids · Tasman Sea	1	3	0	—	2.5× / 0.4
Cable ops · Mozambique Channel	1	2.5	1	2	new / 0
Missiles · South China Sea	1	2.5	1	2	new / 0
Nav aids · Alboran Sea	1	2.4	1	2	5.0× / 0.2
Incidents · Mediterranean Sea - Western Basin	1	2.4	0	—	0.6× / 1.6
Nav aids · English Channel	1	1.6	0	—	0.4× / 2.4
Wrecks · English Channel	1	0.9	1	0	2.5× / 0.4
Derelicts · Solomon Sea	1	0.7	0	—	new / 0
Other · Beaufort Sea	1	0.6	1	0	new / 0
Cable ops · English Channel	1	0.5	0	—	new / 0
Incidents · Timor Sea	1	0.4	0	—	0.8× / 1.2
Incidents · Ceram Sea	1	0.2	0	—	2.5× / 0.4
Incidents · Bass Strait	1	0.1	0	—	2.5× / 0.4
Other · Indian Ocean	1	0.1	0	—	5.0× / 0.2
Nav aids · Caribbean Sealong running	0	310	10	540	0.0× / 3.8
Wrecks · Caribbean Sealong running	0	186	6	912	0.0× / 0.2
Wrecks · North Atlantic Oceanlong running	0	155	5	636	0.0× / 0.2
Wrecks · South Pacific Ocean	0	95.2	3	237	0.0× / 0.4
Other · Arabian Sea	0	93	3	185	0.0× / 0.8
Other · Caribbean Sealong running	0	93	3	922	0.0× / 0.8
Nav aids · Philippine Sea	0	93	3	147	— / 0
Wrecks · Gulf of Mexicolong running	0	62	2	867	0.0× / 0.4
Wrecks · Indian Ocean	0	62	2	127	0.0× / 0.2
Exercises · Ionian Sea	0	62	2	215	— / 0
Nav aids · Laccadive Sea	0	62	2	89	0.0× / 0.4
Wrecks · South Atlantic Ocean	0	62	2	117	0.0× / 1.2
Cable ops · South China Sea	0	42	1	104	0.0× / 3.6
Cable ops · Persian Gulf	0	36.2	1	81	0.0× / 0.2
Other · South China Sealong running	0	35.5	1	404	0.0× / 1.8
Derelicts · South Pacific Ocean	0	32.7	1	59	0.0× / 2.4
Nav aids · Aegean Sea	0	31	1	120	0.0× / 0.2
Missiles · Aegean Sea	0	31	1	215	0.0× / 0.2
Surveys · Andaman or Burma Sea	0	31	1	79	0.0× / 0.2
Surveys · Arabian Sea	0	31	1	42	0.0× / 0.6
Nav aids · Bass Strait	0	31	1	126	0.0× / 0.4
Wrecks · Bay of Bengal	0	31	1	168	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2019-07, 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.