Sea Ledger, June 2018

2018-06-01 to 2018-06-30 · archive

issued: 665
warning-days in force: 14,150
in force at month end: 456
sea × type cells: 256

baseline: same month, previous 5 years (2017-06, 2016-06, 2015-06, 2014-06, 2013-06)

By type

type	issued	warning-days	in force at end
Incidents	171	1,833.4	57
Icebergs	114	148.4	5
Exercises	97	1,188.5	36
Nav aids	59	4,047.9	138
Surveys	56	1,944.4	63
Derelicts	30	193.2	5
Missiles	26	224.4	6
Quakes	25	72.1	2
Other	17	559.7	19
Cable ops	16	425.8	13
Spills	12	174	4
Ordnance	12	214.6	6
Debris	11	35.2	0
Wrecks	10	2,572.2	87
Containers	6	18.6	0
Piracy	3	22.1	0
Restricted	0	126.3	4
Volcanic	0	169.4	5
Structures	0	60	2
Storms	0	120	4

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Incidents · Mediterranean Sea - Eastern Basinsurge	48	554	26	49	2.5× / 19
Icebergs · Southern Oceansurge	41	40.7	0	—	103× / 0.4
Icebergs · South Atlantic Oceansurge	30	34.7	0	—	4.5× / 6.6
Incidents · South China Sea	24	189.5	5	48	1.4× / 16.8
Incidents · North Pacific Ocean	22	290.6	3	309	0.7× / 31.2
Incidents · North Atlantic Ocean	17	264.5	6	45	0.9× / 18
Icebergs · Labrador Sea	17	19.5	2	20	0.8× / 21.4
Incidents · South Atlantic Oceansurge	16	76.8	1	46	2.8× / 5.8
Icebergs · North Atlantic Ocean	14	19.5	0	—	1.6× / 9
Surveys · South Atlantic Ocean	12	230.6	8	88	1.2× / 9.8
Ordnance · North Seasurge	12	154.6	4	68	4.0× / 3
Exercises · Black Seasurge	12	141.5	6	123	2.2× / 5.4
Exercises · North Pacific Ocean	11	142.7	5	65	0.5× / 21.8
Spills · Gulf of Mexico	10	114	4	37	1.7× / 5.8
Exercises · North Atlantic Oceansurge	10	74.2	2	25	2.9× / 3.4
Exercises · South Atlantic Ocean	10	40.2	0	—	1.1× / 9.2
Quakes · South Pacific Ocean	10	30	0	—	1.0× / 10.4
Surveys · North Atlantic Oceanlong running	9	223.7	5	863	1.1× / 7.8
Icebergs · Kara Seanew	9	25.3	2	29	new / 0
Nav aids · North Sea	8	194.7	6	360	0.8× / 9.4
Derelicts · North Atlantic Ocean	8	65.4	2	34	1.7× / 4.8
Nav aids · South Atlantic Ocean	7	575.9	17	149	1.0× / 7
Surveys · Mediterranean Sea - Eastern Basinsurge	7	66.9	3	79	3.9× / 1.8
Incidents · Philippine Sea	7	66.1	1	45	1.4× / 5
Missiles · Barentsz Sea	7	45.1	1	25	1.3× / 5.4
Exercises · Aegean Seasurge	6	307.9	10	185	2.5× / 2.4
Nav aids · Coral Sealong running	6	189.9	6	812	1.6× / 3.8
Surveys · North Sea	6	124.7	3	66	1.3× / 4.6
Exercises · South China Seasurge	6	106	3	34	2.1× / 2.8
Exercises · Bay of Bengal	6	33	2	30	1.1× / 5.6
Nav aids · South Pacific Oceanlong running	5	149.2	7	380	1.7× / 3
Surveys · Sea of Okhotsksurge	5	83.3	4	29	5.0× / 1
Incidents · Caribbean Sea	4	112.2	1	43	0.7× / 6
Exercises · Philippine Sea	4	52.5	1	34	0.9× / 4.4
Exercises · Arabian Sea	4	51.8	1	37	1.1× / 3.6
Cable ops · North Seasurge	4	50.5	2	36	2.5× / 1.6
Other · English Channelsurge	4	50.4	2	56	5.0× / 0.8
Other · The Northwestern Passagessurge	4	46.5	2	23	20× / 0.2
Incidents · South Pacific Ocean	4	42.2	2	22	0.4× / 9.6
Incidents · Gulf of Mexico	4	41.6	4	48	1.1× / 3.6
Incidents · Arabian Sea	4	33.9	3	22	1.8× / 2.2
Exercises · Yellow Sea	4	24.7	0	—	0.3× / 11.8
Missiles · North Atlantic Ocean	4	18.8	1	30	0.4× / 9
Exercises · Mediterranean Sea - Eastern Basin	4	16.2	0	—	0.8× / 5.2
Derelicts · North Pacific Ocean	4	13.6	0	—	1.4× / 2.8
Debris · South Pacific Oceansurge	4	12	0	—	20× / 0.2
Exercises · South Pacific Ocean	4	10.6	0	—	1.8× / 2.2
Wrecks · South China Seasurgelong running	3	481.9	18	1,510	3.8× / 0.8
Nav aids · North Atlantic Oceanlong running	3	469.1	16	491	0.7× / 4.6
Nav aids · Inner Seas off the West Coast of Scotland	3	114.5	4	285	1.9× / 1.6
Incidents · Indian Ocean	3	54.9	0	—	0.3× / 10.6
Missiles · Aegean Seasurge	3	48.8	2	185	15× / 0.2
Cable ops · North Atlantic Ocean	3	44.4	0	—	0.6× / 5
Nav aids · Great Australian Bightsurge	3	43.6	2	142	2.5× / 1.2
Missiles · Japan Seasurge	3	38.5	0	—	15× / 0.2
Exercises · Norwegian Seasurge	3	18.5	1	36	7.5× / 0.4
Quakes · Indian Ocean	3	9	0	—	1.5× / 2
Derelicts · South Atlantic Oceansurge	3	9	0	—	2.1× / 1.4
Containers · Tasman Seasurge	3	9	0	—	15× / 0.2
Surveys · Aegean Seasurge	3	8.9	0	—	7.5× / 0.4
Icebergs · Barentsz Seasurge	3	8.7	1	23	7.5× / 0.4
Nav aids · Gulf of Alaskasurge	3	3.9	1	4	3.8× / 0.8
Incidents · Coral Sea	3	1.4	0	—	0.6× / 5.4
Nav aids · Caribbean Sealong running	2	537.9	19	403	0.9× / 2.2
Nav aids · Arabian Sealong running	2	87.9	3	429	2.0× / 1
Nav aids · Tasman Sealong running	2	76.1	3	487	3.3× / 0.6
Nav aids · Indian Ocean	2	67	2	315	1.0× / 2
Nav aids · Davis Strait	2	38	1	45	1.0× / 2
Wrecks · South Atlantic Oceannew	2	36.3	2	93	new / 0
Derelicts · South China Sealong running	2	36	1	526	2.5× / 0.8
Nav aids · Andaman or Burma Sea	2	34.7	1	29	5.0× / 0.4
Surveys · Timor Seanew	2	30	1	107	new / 0
Exercises · Laccadive Sea	2	29.5	1	33	2.5× / 0.8
Cable ops · Sea of Okhotsk	2	19.5	1	19	2.5× / 0.8
Cable ops · Persian Gulf	2	19.3	1	19	10× / 0.2
Incidents · Bay of Bengal	2	16.7	0	—	1.3× / 1.6
Surveys · Black Sea	2	16.7	1	22	1.3× / 1.6
Exercises · Barentsz Sea	2	15.6	0	—	1.3× / 1.6
Piracy · Gulf of Guinea	2	15.1	0	—	10× / 0.2
Other · North Pacific Ocean	2	12.2	0	—	2.5× / 0.8
Cable ops · Celtic Sea	2	10.5	0	—	1.4× / 1.4
Missiles · Philippine Sea	2	7.6	0	—	10× / 0.2
Derelicts · Bay of Bengal	2	6.8	0	—	10× / 0.2
Exercises · Gulf of Thailandnew	2	6.2	0	—	new / 0
Debris · Caribbean Sea	2	6	0	—	3.3× / 0.6
Derelicts · Coral Sea	2	6	0	—	5.0× / 0.4
Derelicts · Indian Ocean	2	6	0	—	0.5× / 4
Derelicts · Mediterranean Sea - Western Basin	2	6	0	—	10× / 0.2
Quakes · North Atlantic Ocean	2	6	0	—	2.0× / 1
Containers · South Atlantic Ocean	2	6	0	—	10× / 0.2
Quakes · South Atlantic Ocean	2	6	0	—	1.1× / 1.8
Quakes · Coral Sea	2	5.3	1	9	1.0× / 2
Exercises · Indian Ocean	2	4.9	0	—	2.5× / 0.8
Incidents · Solomon Seanew	2	4.8	0	—	new / 0
Quakes · North Pacific Ocean	2	3.8	1	12	0.4× / 5.2
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	2	0.4	0	—	2.5× / 0.8
Nav aids · North Pacific Ocean	1	360.4	12	245	0.4× / 2.8
Nav aids · Gulf of Mexicolong running	1	211.5	8	512	0.3× / 3.8
Wrecks · North Sealong running	1	206.5	7	458	1.7× / 0.6
Surveys · Bering Sea	1	98.6	4	354	new / 0
Nav aids · Mediterranean Sea - Eastern Basinlong running	1	83.5	3	810	new / 0
Surveys · Persian Gulf	1	74.2	2	191	5.0× / 0.2
Other · South China Sealong running	1	68.4	3	1,312	1.3× / 0.8
Surveys · Norwegian Sea	1	63.6	1	65	0.7× / 1.4
Surveys · South China Sea	1	61.7	3	187	0.6× / 1.8
Wrecks · Mediterranean Sea - Eastern Basin	1	52.3	2	248	new / 0
Surveys · Arabian Sea	1	49.1	1	78	1.7× / 0.6
Nav aids · Sea of Okhotsk	1	42.6	2	106	1.7× / 0.6
Wrecks · Irish Sea and St. George's Channellong running	1	39.4	2	537	5.0× / 0.2
Nav aids · English Channel	1	36.9	1	39	0.6× / 1.6
Derelicts · South Pacific Ocean	1	31.1	2	91	0.6× / 1.6
Cable ops · Black Sea	1	30	1	32	1.7× / 0.6
Spills · North Atlantic Ocean	1	23	0	—	0.3× / 3.2
Other · Mediterranean Sea - Eastern Basin	1	19.6	0	—	0.7× / 1.4
Wrecks · Gulf of Thailand	1	18.4	1	18	new / 0
Wrecks · Persian Gulf	1	17.4	1	17	new / 0
Other · Bismarck Sea	1	16.4	0	—	new / 0
Other · Hudson Bay	1	14.3	1	14	new / 0
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	14	0	—	2.5× / 0.4
Incidents · Eastern China Sea	1	12.6	1	45	5.0× / 0.2
Surveys · Bass Strait	1	11.5	1	11	new / 0
Other · Celtic Sea	1	11.4	1	11	2.5× / 0.4
Incidents · Gulf of Thailand	1	10.1	0	—	0.6× / 1.8
Incidents · North Sea	1	10	1	10	5.0× / 0.2
Missiles · South Atlantic Ocean	1	8.8	0	—	1.3× / 0.8
Missiles · South Pacific Ocean	1	8.8	0	—	0.8× / 1.2
Surveys · Bay of Biscay	1	8.3	1	8	new / 0
Incidents · Arafura Sea	1	7.9	0	—	2.5× / 0.4
Incidents · Mediterranean Sea - Western Basin	1	7.9	0	—	0.3× / 3
Nav aids · Ionian Sea	1	7.5	0	—	5.0× / 0.2
Exercises · Sulu Sea	1	7.4	0	—	new / 0
Cable ops · South Pacific Ocean	1	7.3	0	—	new / 0
Missiles · Sea of Okhotsk	1	7.1	0	—	1.7× / 0.6
Incidents · Davis Strait	1	7	1	7	0.7× / 1.4
Piracy · Red Sea	1	7	0	—	1.0× / 1
Surveys · North Pacific Ocean	1	5.2	1	5	0.6× / 1.8
Incidents · Ionian Sea	1	5.1	1	5	1.0× / 1
Surveys · Inner Seas off the West Coast of Scotland	1	4.8	0	—	1.7× / 0.6
Missiles · Laccadive Sea	1	4.5	0	—	0.8× / 1.2
Missiles · Southern Ocean	1	4.5	0	—	5.0× / 0.2
Exercises · Caribbean Sea	1	3.9	0	—	1.0× / 1
Surveys · Celtic Sea	1	3.5	0	—	0.8× / 1.2
Exercises · Adriatic Sea	1	3.4	0	—	2.5× / 0.4
Debris · Celtic Sea	1	3.2	0	—	2.5× / 0.4
Other · Arabian Sea	1	3	0	—	1.3× / 0.8
Derelicts · Caribbean Sea	1	3	0	—	0.8× / 1.2
Debris · Gulf of Mexico	1	3	0	—	2.5× / 0.4
Debris · Indian Ocean	1	3	0	—	1.0× / 1
Quakes · Ionian Sea	1	3	0	—	new / 0
Derelicts · Japan Sea	1	3	0	—	5.0× / 0.2
Incidents · Java Sea	1	3	0	—	0.6× / 1.8
Derelicts · Laccadive Sea	1	3	0	—	1.7× / 0.6
Containers · North Atlantic Ocean	1	3	0	—	5.0× / 0.2
Debris · North Atlantic Ocean	1	3	0	—	0.8× / 1.2
Quakes · Philippine Sea	1	3	0	—	0.4× / 2.6
Quakes · Seto Naikai or Inland Sea	1	3	0	—	new / 0
Quakes · Solomon Sea	1	3	0	—	1.0× / 1
Other · South Atlantic Ocean	1	3	0	—	1.3× / 0.8
Incidents · Tasman Sea	1	3	0	—	1.0× / 1
Exercises · Alboran Sea	1	2.9	0	—	5.0× / 0.2
Nav aids · Irish Sea and St. George's Channel	1	2.7	0	—	0.3× / 3.4
Exercises · Coral Sea	1	1.9	1	1	1.7× / 0.6
Incidents · Japan Sea	1	1.9	1	1	2.5× / 0.4
Derelicts · Banda Sea	1	1.5	0	—	5.0× / 0.2
Missiles · Black Sea	1	1.5	1	1	0.4× / 2.4
Debris · English Channel	1	1	0	—	5.0× / 0.2
Missiles · South China Sea	1	0.4	0	—	5.0× / 0.2
Cable ops · Barentsz Sea	1	0.3	1	0	0.8× / 1.2
Incidents · Bay of Biscay	1	0.1	0	—	1.7× / 0.6
Wrecks · Caribbean Sealong running	0	630	21	530	0.0× / 0.2
Surveys · Arctic Oceanlong running	0	180	6	1,439	— / 0
Surveys · Beaufort Sealong running	0	150	5	2,100	— / 0
Surveys · The Northwestern Passageslong running	0	150	5	2,154	— / 0
Other · Caribbean Sealong running	0	120	4	526	0.0× / 0.2
Wrecks · North Atlantic Oceanlong running	0	120	4	516	— / 0
Wrecks · North Pacific Oceanlong running	0	120	4	436	0.0× / 0.2
Wrecks · South Pacific Ocean	0	105.5	1	278	0.0× / 0.2
Wrecks · Arabian Sealong running	0	90	3	618	0.0× / 0.2
Nav aids · Bay of Bengallong running	0	90	3	442	0.0× / 1
Other · Coral Sealong running	0	90	3	571	0.0× / 1
Wrecks · English Channel	0	90	3	121	0.0× / 0.2
Nav aids · Gulf of California	0	90	3	245	0.0× / 0.4
Wrecks · Gulf of Mexicolong running	0	90	3	471	0.0× / 0.4
Exercises · Ionian Sea	0	90	3	185	— / 0
Wrecks · Laccadive Sealong running	0	90	3	386	0.0× / 0.2
Nav aids · Singapore Straitlong running	0	90	3	933	— / 0
Nav aids · South China Sea	0	90	3	227	0.0× / 0.2
Volcanic · Philippine Sealong running	0	79.4	2	2,253	0.0× / 0.4
Surveys · Barentsz Sea	0	60	2	95	0.0× / 0.4
Wrecks · Bristol Channel	0	60	2	295	— / 0
Storms · Caribbean Sea	0	60	2	291	— / 0
Volcanic · Caribbean Sea	0	60	2	109	— / 0
Nav aids · Gulf of Thailand	0	60	2	157	— / 0
Wrecks · Indian Ocean	0	60	2	359	— / 0
Nav aids · Malacca Straitlong running	0	60	2	978	— / 0
Nav aids · Mediterranean Sea - Western Basin	0	60	2	136	0.0× / 0.4
Storms · South Pacific Ocean	0	60	2	78	— / 0
Wrecks · The Northwestern Passages	0	60	2	308	— / 0
Surveys · Gulf of Guinea	0	47.4	1	134	0.0× / 0.4
Surveys · Mediterranean Sea - Western Basin	0	36.6	1	45	0.0× / 0.6

Cite: seahazards.com Sea Ledger, 2018-06, 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.