Sea Ledger, August 2019

2019-08-01 to 2019-08-31 · archive

issued: 783
warning-days in force: 11,695
in force at month end: 382
sea × type cells: 248

baseline: same month, previous 5 years (2018-08, 2017-08, 2016-08, 2015-08, 2014-08)

By type

type	issued	warning-days	in force at end
Exercises	208	1,320.3	58
Incidents	117	1,173.2	30
Surveys	91	2,334.6	71
Icebergs	84	95.1	4
Nav aids	71	2,943.7	101
Other	48	578.2	20
Missiles	36	373.5	11
Quakes	30	92.1	2
Derelicts	27	211.8	5
Cable ops	22	335	11
Wrecks	12	1,801.3	59
Spills	11	189.4	2
Piracy	6	42	0
Restricted	5	126.5	5
Debris	5	17.1	0
Storms	4	4.1	1
Volcanic	2	16.5	1
Structures	2	34.4	1
Containers	2	6	0

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	41	247.5	9	303	7.1× / 5.8
Incidents · South China Sea	39	306.3	5	48	1.3× / 29.2
Surveys · South Atlantic Oceansurge	32	439.6	12	107	5.2× / 6.2
Icebergs · South Atlantic Oceansurge	32	36	1	31	2.3× / 13.8
Other · North Pacific Oceansurge	30	64.5	3	31	25× / 1.2
Exercises · Black Seasurge	29	157.2	13	43	2.1× / 14
Exercises · North Pacific Ocean	26	140	7	65	1.3× / 20.2
Icebergs · Labrador Sea	23	26.6	2	30	0.9× / 25.4
Incidents · North Pacific Ocean	21	189.6	7	47	0.8× / 24.8
Icebergs · Southern Oceansurge	20	19	1	31	2.0× / 9.8
Exercises · Philippine Seasurge	18	23.9	1	31	3.8× / 4.8
Surveys · North Atlantic Oceansurgelong running	11	500	18	653	2.3× / 4.8
Surveys · Persian Gulfnew	11	197.1	7	138	new / 0
Exercises · South Atlantic Ocean	11	109	1	49	1.4× / 8
Exercises · Bay of Bengal	11	67.1	3	33	1.8× / 6
Exercises · Andaman or Burma Seasurge	11	36.9	4	33	55× / 0.2
Exercises · South Pacific Oceansurge	11	27.9	1	35	3.2× / 3.4
Nav aids · North Sea	10	203.9	8	219	1.0× / 10.2
Nav aids · North Pacific Oceansurgelong running	10	202.5	6	413	2.6× / 3.8
Derelicts · Timor Seanew	10	22.6	0	—	new / 0
Incidents · North Atlantic Ocean	9	142.8	8	49	0.6× / 14.2
Exercises · Yellow Sea	9	36.6	2	32	1.1× / 8.6
Surveys · North Seasurge	8	149.6	4	59	3.6× / 2.2
Missiles · North Atlantic Ocean	8	23.8	0	—	1.3× / 6
Quakes · South Pacific Ocean	8	21	1	30	0.8× / 9.6
Icebergs · Davis Straitsurge	8	10.5	0	—	6.7× / 1.2
Nav aids · Indian Ocean	7	96.7	4	149	1.5× / 4.6
Missiles · North Pacific Oceanlong running	7	78.4	3	533	1.0× / 6.8
Exercises · Arabian Seasurge	7	47.6	2	36	2.3× / 3
Nav aids · North Atlantic Ocean	6	341.7	10	296	1.2× / 5
Missiles · Barentsz Seasurge	6	29.6	3	26	2.1× / 2.8
Quakes · Coral Seasurge	6	20.6	0	—	7.5× / 0.8
Quakes · North Pacific Ocean	6	20.5	1	33	1.1× / 5.4
Surveys · South China Sea	5	61.7	2	28	1.7× / 3
Exercises · Barentsz Seasurge	5	26.8	1	22	8.3× / 0.6
Incidents · Indian Ocean	5	26.7	2	18	0.9× / 5.8
Exercises · North Atlantic Ocean	5	17.2	1	22	0.6× / 8.4
Nav aids · South Atlantic Ocean	4	528.2	18	197	0.7× / 6
Missiles · Black Sea	4	134.9	3	33	0.8× / 5.2
Surveys · Mediterranean Sea - Eastern Basin	4	111.6	3	120	1.7× / 2.4
Spills · Gulf of Mexico	4	91	0	—	0.7× / 6.2
Spills · North Pacific Oceansurge	4	53	1	41	2.0× / 2
Incidents · South Atlantic Ocean	4	51	0	—	0.6× / 6.6
Incidents · Arabian Seasurge	4	46.6	2	24	3.3× / 1.2
Incidents · Philippine Sea	4	42.9	1	21	0.8× / 4.8
Cable ops · North Atlantic Ocean	4	41.3	2	37	0.5× / 7.4
Exercises · Laccadive Sea	4	39.4	2	33	1.8× / 2.2
Incidents · South Pacific Ocean	4	33.2	0	—	0.6× / 6.8
Piracy · Gulf of Guineasurge	4	28	0	—	5.0× / 0.8
Nav aids · Caribbean Sealong running	3	325.7	12	571	1.4× / 2.2
Nav aids · Inner Seas off the West Coast of Scotland	3	58.6	1	74	1.0× / 3
Nav aids · Hudson Baynew	3	51	2	27	new / 0
Cable ops · South China Sea	3	40.6	1	135	1.1× / 2.8
Incidents · Java Seasurge	3	39.4	0	—	3.0× / 1
Nav aids · Coral Sea	3	33.7	2	67	0.7× / 4.2
Derelicts · South Pacific Ocean	3	31.7	1	90	1.9× / 1.6
Other · North Atlantic Ocean	3	26.3	2	24	1.7× / 1.8
Cable ops · Tasman Seasurge	3	22.3	1	24	15× / 0.2
Exercises · Sulu Seanew	3	20.5	1	38	new / 0
Incidents · Coral Sea	3	16.9	0	—	0.6× / 5.4
Nav aids · Great Australian Bightsurge	3	15	1	19	2.5× / 1.2
Exercises · Coral Sea	3	11.6	0	—	1.7× / 1.8
Derelicts · North Atlantic Ocean	3	10.1	0	—	0.9× / 3.4
Quakes · Southern Oceansurge	3	9	0	—	5.0× / 0.6
Exercises · South China Sea	3	7.6	0	—	0.8× / 3.6
Storms · North Atlantic Oceannew	3	2.8	1	4	new / 0
Wrecks · South China Sea	2	492.3	17	236	1.7× / 1.2
Surveys · Sea of Okhotsk	2	208.9	6	225	1.4× / 1.4
Other · Arabian Sea	2	112.3	3	216	5.0× / 0.4
Wrecks · South Pacific Ocean	2	77	3	268	10× / 0.2
Nav aids · Mediterranean Sea - Western Basin	2	72.4	4	212	5.0× / 0.4
Incidents · Gulf of Mexico	2	58.6	1	34	0.7× / 3
Nav aids · Mediterranean Sea - Eastern Basinnew	2	53.4	2	59	new / 0
Wrecks · Sea of Okhotsk	2	49.1	3	51	10× / 0.2
Surveys · Bass Strait	2	42.9	0	—	5.0× / 0.4
Restricted · South Atlantic Ocean	2	37.2	1	242	2.0× / 1
Cable ops · North Pacific Ocean	2	33.5	2	91	10× / 0.2
Surveys · Bay of Bengal	2	31.1	1	45	0.8× / 2.6
Cable ops · Gulf of Mexico	2	29.7	1	28	0.8× / 2.6
Surveys · Arabian Sea	2	28.9	1	73	3.3× / 0.6
Incidents · Molukka Sea	2	28.5	1	39	3.3× / 0.6
Derelicts · Indian Ocean	2	27.2	1	24	0.7× / 2.8
Surveys · North Pacific Ocean	2	26.8	1	21	3.3× / 0.6
Incidents · Ionian Sea	2	20.7	2	12	2.0× / 1
Surveys · South Pacific Ocean	2	19.2	0	—	10× / 0.2
Nav aids · Bay of Bengal	2	18.7	1	18	2.0× / 1
Incidents · Ceram Sea	2	18.4	0	—	3.3× / 0.6
Nav aids · English Channel	2	17.1	1	19	0.8× / 2.4
Missiles · South Pacific Ocean	2	16.8	0	—	1.3× / 1.6
Volcanic · South Pacific Oceannew	2	16.5	1	16	new / 0
Incidents · Gulf of Thailand	2	15.8	0	—	3.3× / 0.6
Cable ops · Strait of Gibraltar	2	12.7	0	—	10× / 0.2
Exercises · Norwegian Sea	2	11.7	1	21	5.0× / 0.4
Cable ops · Gulf of Suez	2	9.8	0	—	10× / 0.2
Exercises · Indian Ocean	2	8.9	0	—	1.3× / 1.6
Surveys · Philippine Sea	2	8.9	0	—	5.0× / 0.4
Spills · North Atlantic Ocean	2	8.4	1	30	0.6× / 3.2
Missiles · South Atlantic Ocean	2	8.2	0	—	3.3× / 0.6
Quakes · Indian Ocean	2	6	0	—	0.8× / 2.4
Derelicts · North Pacific Ocean	2	6	0	—	0.9× / 2.2
Quakes · Philippine Sea	2	6	0	—	1.3× / 1.6
Debris · South Pacific Ocean	2	5.9	0	—	10× / 0.2
Cable ops · Aegean Seanew	2	3.7	1	25	new / 0
Structures · South Atlantic Ocean	2	3.4	0	—	3.3× / 0.6
Incidents · Tasman Sea	2	3.4	0	—	3.3× / 0.6
Incidents · Halmahera Seanew	2	3.3	1	6	new / 0
Nav aids · Norwegian Seanew	2	3	0	—	new / 0
Nav aids · The Northwestern Passages	2	0.5	0	—	3.3× / 0.6
Wrecks · Caribbean Sealong running	1	198.5	7	943	new / 0
Nav aids · Gulf of Mexico	1	190.6	6	306	0.3× / 3
Exercises · Aegean Sea	1	184.9	6	246	1.0× / 1
Wrecks · North Atlantic Oceanlong running	1	169.6	6	667	2.5× / 0.4
Surveys · Norwegian Sea	1	147.5	4	115	2.5× / 0.4
Other · Caribbean Sealong running	1	104.4	4	953	5.0× / 0.2
Surveys · Kara Sea	1	98.5	3	53	0.8× / 1.2
Derelicts · South China Sea	1	64.5	3	60	0.5× / 2.2
Restricted · Persian Gulf	1	62	2	136	5.0× / 0.2
Wrecks · Andaman or Burma Sea	1	56.3	2	43	5.0× / 0.2
Other · South China Sealong running	1	51.2	1	435	0.6× / 1.6
Wrecks · South Atlantic Ocean	1	51	1	148	2.5× / 0.4
Other · Mozambique Channel	1	47.1	1	40	2.5× / 0.4
Incidents · Caribbean Sea	1	31.9	0	—	0.3× / 4
Nav aids · Bass Strait	1	31.1	1	157	1.7× / 0.6
Other · North Sea	1	31	1	67	0.5× / 2
Surveys · Andaman or Burma Sea	1	25.6	1	63	2.5× / 0.4
Surveys · Arctic Ocean	1	25.5	1	25	1.7× / 0.6
Surveys · Beaufort Sea	1	25.1	1	25	5.0× / 0.2
Derelicts · Eastern China Sea	1	19.7	0	—	new / 0
Restricted · Black Sea	1	19.2	1	19	0.6× / 1.8
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	19.1	0	—	0.6× / 1.8
Incidents · Sulu Sea	1	18.2	0	—	5.0× / 0.2
Other · Celtic Sea	1	17.9	0	—	5.0× / 0.2
Incidents · Malacca Strait	1	16.6	0	—	2.5× / 0.4
Missiles · Japan Sea	1	15.6	0	—	2.5× / 0.4
Incidents · Mediterranean Sea - Western Basin	1	14.2	0	—	0.6× / 1.6
Spills · Bering Sea	1	14	0	—	2.5× / 0.4
Other · Laccadive Sea	1	13.1	1	43	new / 0
Other · Inner Seas off the West Coast of Scotland	1	12.8	1	116	new / 0
Wrecks · The Northwestern Passages	1	12.1	1	12	1.7× / 0.6
Wrecks · Inner Seas off the West Coast of Scotland	1	12	1	11	new / 0
Restricted · Kara Sea	1	8.1	1	8	new / 0
Piracy · Java Sea	1	7	0	—	new / 0
Piracy · Singapore Strait	1	7	0	—	new / 0
Exercises · Arctic Ocean	1	6.8	0	—	new / 0
Other · Bay of Bengal	1	6.7	0	—	new / 0
Missiles · Andaman or Burma Sea	1	6.5	0	—	new / 0
Exercises · Gulf of Thailand	1	6.5	0	—	5.0× / 0.2
Missiles · Baffin Bay	1	6.4	1	6	new / 0
Exercises · Celebes Sea	1	6.4	0	—	2.5× / 0.4
Exercises · Japan Sea	1	6.2	1	36	5.0× / 0.2
Cable ops · Solomon Sea	1	5.9	0	—	new / 0
Nav aids · Strait of Gibraltar	1	5.4	1	5	5.0× / 0.2
Missiles · Arctic Ocean	1	5.3	0	—	2.5× / 0.4
Derelicts · Philippine Sea	1	4.8	0	—	new / 0
Missiles · White Sea	1	4.2	0	—	2.5× / 0.4
Exercises · Mediterranean Sea - Western Basin	1	4.1	0	—	1.7× / 0.6
Cable ops · Coral Sea	1	4	0	—	new / 0
Missiles · Laccadive Sea	1	4	0	—	1.0× / 1
Containers · Bay of Bengal	1	3	0	—	new / 0
Debris · English Channel	1	3	0	—	5.0× / 0.2
Containers · Indian Ocean	1	3	0	—	new / 0
Icebergs · Indian Ocean	1	3	0	—	new / 0
Other · Indian Ocean	1	3	0	—	5.0× / 0.2
Derelicts · Japan Sea	1	3	0	—	1.7× / 0.6
Derelicts · Mediterranean Sea - Eastern Basin	1	3	0	—	0.6× / 1.8
Derelicts · Mediterranean Sea - Western Basin	1	3	0	—	1.7× / 0.6
Debris · North Atlantic Ocean	1	3	0	—	0.8× / 1.2
Quakes · North Atlantic Ocean	1	3	0	—	5.0× / 0.2
Debris · North Pacific Ocean	1	3	0	—	1.7× / 0.6
Quakes · Solomon Sea	1	3	0	—	0.6× / 1.6
Quakes · Tasman Sea	1	3	0	—	5.0× / 0.2
Surveys · Tasman Sea	1	3	1	3	2.5× / 0.4
Nav aids · Gulf of Alaska	1	2.8	0	—	0.7× / 1.4
Missiles · Arabian Sea	1	2.4	0	—	new / 0
Incidents · Bismarck Sea	1	2.2	0	—	1.7× / 0.6
Nav aids · Celtic Sea	1	1.6	1	1	0.6× / 1.6
Exercises · Gulf of Mexico	1	1.4	0	—	0.5× / 2
Storms · Caribbean Sea	1	1.3	0	—	new / 0
Other · Hudson Bay	1	1.1	0	—	2.5× / 0.4
Nav aids · Beaufort Sea	1	0.9	0	—	1.3× / 0.8
Other · Singapore Strait	1	0.8	1	0	new / 0
Other · Solomon Sea	1	0.6	0	—	new / 0
Derelicts · South Atlantic Ocean	1	0.6	0	—	1.7× / 0.6
Other · Java Sea	1	0.2	0	—	new / 0
Incidents · Eastern China Sea	1	0.1	0	—	2.5× / 0.4
Incidents · Persian Gulf	1	0	0	—	5.0× / 0.2
Nav aids · South Pacific Ocean	0	159.6	5	299	0.0× / 4.4
Nav aids · Mozambique Channel	0	124	4	177	— / 0
Wrecks · North Pacific Oceanlong running	0	93	3	806	— / 0
Nav aids · Philippine Sea	0	93	3	178	— / 0
Wrecks · Arabian Sea	0	84.8	2	215	0.0× / 1.2
Nav aids · Andaman or Burma Sea	0	67	2	127	0.0× / 0.4
Wrecks · Gulf of Mexicolong running	0	62	2	898	— / 0
Exercises · Ionian Sea	0	62	2	246	— / 0
Wrecks · North Sea	0	54.7	0	—	0.0× / 1.4
Wrecks · Indian Ocean	0	53.8	1	158	— / 0
Nav aids · Laccadive Sea	0	52.9	1	120	0.0× / 1
Nav aids · Aegean Sea	0	31	1	151	— / 0
Missiles · Aegean Sea	0	31	1	246	— / 0
Nav aids · Arabian Sea	0	31	1	151	0.0× / 2.2

Cite: seahazards.com Sea Ledger, 2019-08, 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.