Sea Ledger, June 2017

2017-06-01 to 2017-06-30 · archive

issued: 645
warning-days in force: 11,502
in force at month end: 386
sea × type cells: 241

baseline: same month, previous 5 years (2016-06, 2015-06, 2014-06, 2013-06, 2012-06)

By type

type	issued	warning-days	in force at end
Incidents	178	1,824	50
Nav aids	86	2,616.8	91
Exercises	83	978.9	24
Surveys	76	2,175.1	74
Missiles	48	344.3	13
Icebergs	32	43.2	2
Quakes	31	88.3	6
Other	23	544.7	19
Derelicts	17	110.6	4
Spills	17	248	9
Wrecks	13	1,666.6	59
Cable ops	12	309.7	15
Ordnance	9	151.1	5
Debris	8	24	0
Piracy	6	38	3
Restricted	4	154.2	5
Containers	2	4.6	1
Volcanic	0	150	5
Structures	0	30	1

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	32	538.5	14	48	2.5× / 12.6
Surveys · South Atlantic Oceansurge	30	163.9	6	72	6.8× / 4.4
Exercises · North Pacific Ocean	29	130.2	3	65	1.7× / 17.2
Incidents · North Pacific Ocean	28	243.8	7	48	0.9× / 32.6
Incidents · South China Sea	26	246.2	7	48	1.9× / 14
Icebergs · Labrador Sea	26	29.7	2	26	1.2× / 21.6
Incidents · North Atlantic Ocean	20	260.6	4	46	1.1× / 18.4
Nav aids · North Sea	14	114.7	5	65	1.6× / 8.8
Missiles · North Pacific Ocean	13	76.9	3	90	1.8× / 7.2
Quakes · South Pacific Ocean	13	32.5	4	21	1.4× / 9.4
Nav aids · South Pacific Oceansurge	12	191.6	5	308	15× / 0.8
Missiles · North Atlantic Ocean	12	100.7	1	60	1.4× / 8.4
Spills · Gulf of Mexicosurge	11	162	6	40	2.9× / 3.8
Nav aids · Gulf of Mexicosurge	9	192	9	147	4.5× / 2
Exercises · South Atlantic Ocean	9	67.3	0	—	1.0× / 8.8
Missiles · Barentsz Seasurge	9	42.6	1	19	2.5× / 3.6
Ordnance · North Seasurge	8	78.1	3	35	5.0× / 1.6
Incidents · Indian Ocean	8	49.4	1	40	0.7× / 11
Exercises · North Atlantic Oceansurge	8	24.8	1	25	2.9× / 2.8
Exercises · Aegean Seasurge	7	369.2	11	183	7.0× / 1
Surveys · Norwegian Seanew	7	228.9	10	77	new / 0
Nav aids · North Pacific Oceansurge	7	169.3	6	254	5.0× / 1.4
Nav aids · Coral Seasurgelong running	7	168.2	5	1,169	2.5× / 2.8
Surveys · South China Seasurge	7	105.5	4	107	7.0× / 1
Surveys · North Sea	7	53.1	3	64	1.8× / 3.8
Exercises · Bay of Bengal	7	42.5	2	63	1.4× / 5.2
Quakes · North Pacific Ocean	7	22.8	1	30	1.5× / 4.8
Incidents · South Pacific Ocean	7	15.1	0	—	0.7× / 10.6
Incidents · Caribbean Sea	6	81.2	3	44	1.1× / 5.4
Incidents · Mediterranean Sea - Western Basinsurge	6	65.8	1	46	3.3× / 1.8
Missiles · Black Seasurge	6	63	4	30	3.8× / 1.6
Incidents · Coral Sea	6	2.6	0	—	1.1× / 5.6
Nav aids · South Atlantic Ocean	5	201.6	8	170	0.6× / 8.6
Exercises · Mediterranean Sea - Eastern Basin	5	22.1	0	—	0.9× / 5.8
Surveys · North Atlantic Oceanlong running	4	323.7	11	752	0.5× / 7.6
Nav aids · North Atlantic Oceanlong running	4	179.5	6	1,500	0.9× / 4.2
Exercises · Black Sea	4	101.8	1	31	0.9× / 4.6
Surveys · Black Seasurge	4	80.7	4	64	2.9× / 1.4
Incidents · Gulf of Mexico	4	54.8	1	44	1.2× / 3.4
Incidents · Arabian Seasurge	4	40.9	0	—	2.5× / 1.6
Other · Indian Oceansurge	4	39.3	1	63	4.0× / 1
Other · North Atlantic Oceansurge	4	24.1	0	—	4.0× / 1
Piracy · Red Seasurge	4	19.8	2	27	20× / 0.2
Derelicts · North Atlantic Ocean	4	18.7	1	38	0.9× / 4.4
Other · North Pacific Oceansurge	4	16.5	2	33	20× / 0.2
Incidents · South Atlantic Ocean	4	8.1	2	29	0.7× / 6
Nav aids · Irish Sea and St. George's Channel	4	7.1	0	—	1.2× / 3.4
Wrecks · South China Seasurgelong running	3	443.9	15	1,145	15× / 0.2
Wrecks · North Seanew	3	184.3	6	93	new / 0
Nav aids · Inner Seas off the West Coast of Scotlandsurge	3	65.2	2	37	2.5× / 1.2
Exercises · Arabian Sea	3	37.3	1	30	0.8× / 3.8
Nav aids · Celtic Seasurge	3	31.6	1	79	2.5× / 1.2
Incidents · Philippine Sea	3	31.6	1	35	0.6× / 5.2
Exercises · Yellow Sea	3	19.2	0	—	0.3× / 12.2
Derelicts · Indian Ocean	3	15.1	1	38	0.8× / 4
Debris · Indian Oceansurge	3	9	0	—	3.8× / 0.8
Quakes · Indian Ocean	3	9	0	—	1.4× / 2.2
Icebergs · North Atlantic Ocean	3	4.5	0	—	0.3× / 8.6
Nav aids · Arabian Sea	2	129.1	4	64	2.5× / 0.8
Other · Coral Sealong running	2	104.6	5	807	3.3× / 0.6
Surveys · Mediterranean Sea - Eastern Basin	2	68.6	4	71	1.0× / 2
Cable ops · South Atlantic Ocean	2	51.8	3	106	0.1× / 14
Surveys · Celtic Sea	2	50.6	2	41	2.0× / 1
Surveys · Gulf of Mexico	2	36.9	1	57	2.5× / 0.8
Other · South Pacific Ocean	2	32.9	1	58	3.3× / 0.6
Nav aids · Davis Strait	2	30.1	2	15	1.3× / 1.6
Spills · North Pacific Ocean	2	28	1	39	1.0× / 2
Surveys · Gulf of Guineanew	2	26.4	0	—	new / 0
Incidents · Adriatic Sea	2	25.9	1	28	2.5× / 0.8
Incidents · Bay of Bengal	2	20.6	0	—	1.7× / 1.2
Incidents · Banda Sea	2	20.2	0	—	5.0× / 0.4
Cable ops · South China Sea	2	18.9	2	11	0.5× / 4.2
Other · Gulf of Mexico	2	16.4	0	—	10× / 0.2
Incidents · Mozambique Channel	2	16.3	2	10	0.8× / 2.4
Spills · Gulf of Alaska	2	16	1	21	2.0× / 1
Missiles · Sea of Okhotsk	2	10.2	2	6	3.3× / 0.6
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	2	8.6	0	—	5.0× / 0.4
Incidents · Malacca Strait	2	6.7	0	—	5.0× / 0.4
Icebergs · Barentsz Seanew	2	6	0	—	new / 0
Debris · Celtic Seanew	2	6	0	—	new / 0
Derelicts · North Pacific Ocean	2	6	0	—	0.5× / 3.8
Derelicts · South Atlantic Ocean	2	6	0	—	1.7× / 1.2
Quakes · Southern Ocean	2	6	0	—	3.3× / 0.6
Nav aids · Gulf of Alaska	2	5.9	0	—	5.0× / 0.4
Containers · North Seanew	2	4.6	1	18	new / 0
Incidents · Ionian Sea	2	3.9	0	—	2.0× / 1
Missiles · Indian Ocean	2	3.2	0	—	1.0× / 2
Other · Tasman Sea	2	2.9	1	17	5.0× / 0.4
Incidents · Java Sea	2	2	0	—	1.4× / 1.4
Nav aids · Caribbean Sealong running	1	368.9	13	372	0.5× / 2
Wrecks · Caribbean Sea	1	322.1	11	349	new / 0
Wrecks · South Pacific Ocean	1	91.4	4	161	new / 0
Surveys · Arabian Sea	1	80.9	0	—	2.5× / 0.4
Surveys · Bay of Bengal	1	79	2	357	5.0× / 0.2
Wrecks · North Pacific Ocean	1	74.1	3	240	new / 0
Other · South China Sealong running	1	62.5	3	947	1.7× / 0.6
Surveys · Sea of Okhotsk	1	55.2	2	207	0.6× / 1.6
Nav aids · Mediterranean Sea - Western Basin	1	53.5	2	52	2.5× / 0.4
Cable ops · Caribbean Sea	1	47.7	1	196	1.7× / 0.6
Nav aids · Great Australian Bightlong running	1	47	1	576	0.6× / 1.6
Surveys · Caribbean Sea	1	38.1	2	169	1.3× / 0.8
Wrecks · Gulf of Mexico	1	37.3	2	106	5.0× / 0.2
Missiles · Aegean Sea	1	34.6	1	180	new / 0
Restricted · Black Sealong running	1	33.3	1	1,486	2.5× / 0.4
Exercises · Laccadive Sea	1	32.6	0	—	1.7× / 0.6
Nav aids · Bay of Bengal	1	32.5	1	77	1.0× / 1
Cable ops · North Atlantic Ocean	1	32.2	1	84	0.1× / 6.8
Nav aids · Indian Oceanlong running	1	30.9	1	719	0.5× / 2
Nav aids · Bristol Channel	1	30.6	1	43	2.5× / 0.4
Incidents · Eastern China Sea	1	30.6	1	47	new / 0
Wrecks · English Channel	1	30	1	49	2.5× / 0.4
Nav aids · Ionian Sea	1	29.6	1	29	new / 0
Nav aids · South China Sea	1	26.4	1	26	new / 0
Restricted · Caribbean Sea	1	24.3	1	24	new / 0
Surveys · North Pacific Ocean	1	23.6	0	—	0.6× / 1.8
Surveys · Andaman or Burma Sea	1	23.2	0	—	5.0× / 0.2
Restricted · Norwegian Sea	1	21.4	1	21	5.0× / 0.2
Wrecks · Laccadive Sea	1	21.2	1	21	new / 0
Incidents · Gulf of Thailand	1	19	1	40	0.6× / 1.6
Other · Arabian Sea	1	16.6	0	—	1.7× / 0.6
Spills · North Atlantic Ocean	1	14	0	—	0.3× / 3.2
Exercises · South Pacific Ocean	1	14	0	—	0.4× / 2.4
Incidents · Celtic Sea	1	13.6	1	13	2.5× / 0.4
Ordnance · Philippine Sea	1	13	0	—	1.0× / 1
Cable ops · North Pacific Ocean	1	10.7	0	—	new / 0
Piracy · Gulf of Aden	1	9.9	1	35	1.0× / 1
Cable ops · Gulf of Guinea	1	8.3	1	8	2.5× / 0.4
Cable ops · Mediterranean Sea - Eastern Basin	1	7.4	1	7	0.8× / 1.2
Exercises · Indian Ocean	1	7.2	0	—	1.3× / 0.8
Missiles · Japan Sea	1	7.1	0	—	new / 0
Piracy · Gulf of Oman	1	7	0	—	5.0× / 0.2
Exercises · Caribbean Sea	1	6.8	0	—	1.3× / 0.8
Incidents · Savu Sea	1	6.4	0	—	5.0× / 0.2
Restricted · South Atlantic Ocean	1	5.7	0	—	new / 0
Exercises · Andaman or Burma Sea	1	5.4	0	—	1.7× / 0.6
Surveys · Mediterranean Sea - Western Basin	1	5.2	0	—	1.7× / 0.6
Missiles · Laccadive Sea	1	4.8	0	—	0.8× / 1.2
Incidents · Davis Strait	1	4.5	1	4	0.8× / 1.2
Surveys · Kara Sea	1	4.4	1	4	new / 0
Derelicts · Gulf of Mexico	1	4.1	1	4	0.6× / 1.6
Incidents · Bismarck Sea	1	3.8	0	—	5.0× / 0.2
Incidents · Japan Sea	1	3.7	1	3	5.0× / 0.2
Exercises · Baltic Sea	1	3.2	0	—	0.4× / 2.4
Quakes · Aegean Sea	1	3	0	—	new / 0
Derelicts · Bay of Bengal	1	3	0	—	new / 0
Quakes · Bering Sea	1	3	0	—	0.4× / 2.4
Quakes · Bismarck Sea	1	3	0	—	2.5× / 0.4
Nav aids · Black Sea	1	3	1	2	new / 0
Debris · Caribbean Sea	1	3	0	—	2.5× / 0.4
Derelicts · Coral Sea	1	3	0	—	1.7× / 0.6
Quakes · Coral Sea	1	3	0	—	0.6× / 1.8
Debris · English Channel	1	3	0	—	new / 0
Icebergs · Indian Ocean	1	3	0	—	5.0× / 0.2
Derelicts · Laccadive Sea	1	3	0	—	2.5× / 0.4
Quakes · Mozambique Channel	1	3	0	—	new / 0
Debris · North Atlantic Ocean	1	3	0	—	1.0× / 1
Derelicts · South Pacific Ocean	1	3	0	—	0.5× / 2
Derelicts · Tasman Sea	1	3	0	—	5.0× / 0.2
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	3	1	3	5.0× / 0.2
Incidents · Singapore Strait	1	2.9	1	2	5.0× / 0.2
Wrecks · Tasman Sea	1	2.7	1	2	5.0× / 0.2
Other · Celtic Sea	1	2.4	0	—	5.0× / 0.2
Surveys · Aegean Sea	1	2.2	0	—	5.0× / 0.2
Exercises · Barentsz Sea	1	1.8	1	1	0.7× / 1.4
Incidents · Celebes Sea	1	1.8	0	—	new / 0
Cable ops · Beaufort Sea	1	1.1	1	1	new / 0
Cable ops · North Sea	1	1.1	1	1	0.6× / 1.6
Quakes · North Atlantic Ocean	1	0.9	1	0	1.3× / 0.8
Cable ops · Chukchi Sea	1	0.5	1	0	new / 0
Exercises · Mediterranean Sea - Western Basin	1	0.5	1	0	5.0× / 0.2
Missiles · Philippine Sea	1	0.5	1	0	new / 0
Incidents · Timor Sea	1	0.5	0	—	1.7× / 0.6
Nav aids · Timor Sea	1	0.1	0	—	1.3× / 0.8
Surveys · Arctic Oceanlong running	0	210	7	1,074	— / 0
Surveys · Beaufort Sealong running	0	120	4	1,735	— / 0
Other · Caribbean Sea	0	120	4	161	0.0× / 0.4
Surveys · Bering Sea	0	90	3	355	— / 0
Exercises · Ionian Sea	0	90	3	180	— / 0
Volcanic · Philippine Sealong running	0	90	3	1,888	0.0× / 0.4
Nav aids · Tasman Sealong running	0	90	3	395	0.0× / 1.2
Surveys · Indian Ocean	0	63.5	2	218	0.0× / 0.4
Wrecks · Arabian Sea	0	60	2	253	0.0× / 0.4
Ordnance · Black Sealong running	0	60	2	380	0.0× / 1
Wrecks · Irish Sea and St. George's Channel	0	60	2	172	0.0× / 0.6
Nav aids · Malacca Straitlong running	0	60	2	613	— / 0
Nav aids · Mediterranean Sea - Eastern Basinlong running	0	60	2	445	— / 0
Cable ops · Persian Gulf	0	60	2	199	0.0× / 0.2
Nav aids · Persian Gulf	0	60	2	331	0.0× / 0.2
Wrecks · Persian Gulf	0	60	2	92	— / 0
Wrecks · South Atlantic Ocean	0	60	2	140	— / 0
Surveys · The Northwestern Passageslong running	0	60	2	1,789	— / 0
Surveys · Persian Gulf	0	46	1	94	0.0× / 0.2
Other · Davis Strait	0	45	0	—	0.0× / 0.8
Nav aids · Andaman or Burma Sea	0	30	1	116	0.0× / 0.4
Wrecks · Andaman or Burma Sea	0	30	1	175	— / 0
Nav aids · Arafura Sealong running	0	30	1	372	0.0× / 0.4
Restricted · Baltic Sea	0	30	1	288	— / 0
Nav aids · Bass Straitlong running	0	30	1	790	0.0× / 1.2
Wrecks · Black Sea	0	30	1	260	— / 0
Volcanic · Caribbean Sea	0	30	1	61	— / 0

Cite: seahazards.com Sea Ledger, 2017-06, 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.