Sea Ledger, June 2016

2016-06-01 to 2016-06-30 · archive

issued: 656
warning-days in force: 11,036
in force at month end: 383
sea × type cells: 250

baseline: same month, previous 5 years (2015-06, 2014-06, 2013-06, 2012-06, 2011-06)

By type

type	issued	warning-days	in force at end
Incidents	151	944.3	39
Exercises	107	1,171.9	35
Surveys	73	1,795.4	60
Nav aids	65	2,791.1	97
Icebergs	63	75.6	4
Cable ops	39	1,008	34
Missiles	39	321.1	12
Quakes	37	116.4	2
Other	19	570	21
Spills	19	249	10
Derelicts	17	116	2
Ordnance	10	266	9
Debris	6	19.3	0
Restricted	5	436.5	18
Mines	2	6	0
Containers	2	3.3	1
Structures	1	107.3	4
Piracy	1	0.9	1
Wrecks	0	874.4	29
War risk	0	60	2
Volcanic	0	103.4	3

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · North Atlantic Oceansurge	32	36.3	3	31	15× / 2.2
Icebergs · South Atlantic Oceansurge	31	39.3	1	30	19× / 1.6
Exercises · North Pacific Ocean	27	112.1	3	51	1.9× / 14.4
Incidents · Mediterranean Sea - Eastern Basinsurge	24	99.4	7	36	3.1× / 7.8
Incidents · North Pacific Ocean	24	76.2	0	—	0.8× / 31.2
Incidents · North Atlantic Ocean	16	236.4	11	60	1.0× / 15.6
Incidents · South China Sea	16	148	4	64	1.3× / 12.6
Missiles · North Atlantic Oceansurge	15	70.1	1	36	2.4× / 6.2
Surveys · North Seasurge	14	40.8	0	—	14× / 1
Exercises · Yellow Sea	12	87.8	2	34	1.1× / 11.4
Incidents · South Atlantic Oceansurge	12	72.5	2	30	2.5× / 4.8
Exercises · South Atlantic Ocean	12	64.7	0	—	1.6× / 7.6
Cable ops · North Atlantic Ocean	9	120.6	5	116	1.6× / 5.8
Incidents · South Pacific Ocean	9	75.4	3	36	0.9× / 10
Surveys · Philippine Seasurge	9	16.8	0	—	45× / 0.2
Nav aids · South Atlantic Ocean	8	337.1	12	205	1.0× / 7.8
Nav aids · North Sea	8	251.4	7	317	0.9× / 8.6
Spills · North Atlantic Oceansurge	8	86	3	42	4.4× / 1.8
Missiles · North Pacific Ocean	8	41.5	2	28	1.2× / 6.8
Quakes · South Pacific Ocean	8	25.3	0	—	0.8× / 10.6
Incidents · Caribbean Seasurge	8	19.3	1	27	2.1× / 3.8
Incidents · Philippine Sea	8	9.2	0	—	1.7× / 4.8
Surveys · North Atlantic Oceanlong running	7	239.4	8	758	0.9× / 7.6
Surveys · South Atlantic Oceansurge	7	153.9	6	181	2.1× / 3.4
Ordnance · North Seasurge	7	120	4	296	35× / 0.2
Spills · Gulf of Mexicosurge	7	92	2	40	2.7× / 2.6
Quakes · Coral Seasurge	7	17.6	2	16	7.0× / 1
Surveys · North Pacific Oceansurge	7	8.2	0	—	18× / 0.4
Exercises · Philippine Sea	6	93.2	4	35	1.0× / 5.8
Exercises · Bay of Bengal	6	52.3	2	56	1.2× / 5
Nav aids · Davis Straitsurge	6	33	0	—	10× / 0.6
Quakes · North Pacific Ocean	6	20.4	0	—	1.0× / 6
Nav aids · North Atlantic Oceanlong running	5	287.1	8	1,135	1.2× / 4.2
Surveys · Mediterranean Sea - Eastern Basinsurge	5	78.8	3	36	5.0× / 1
Incidents · Gulf of Mexico	5	43	2	33	1.9× / 2.6
Missiles · Barentsz Sea	5	27.1	2	30	1.4× / 3.6
Exercises · North Atlantic Oceansurge	5	15.5	0	—	2.3× / 2.2
Incidents · Indian Ocean	5	11.6	2	28	0.5× / 10.8
Nav aids · Caribbean Seasurgelong running	4	259.8	12	871	3.3× / 1.2
Cable ops · Norwegian Sea	4	204	6	62	1.7× / 2.4
Nav aids · Coral Sealong running	4	125.3	4	804	1.3× / 3.2
Exercises · Black Sea	4	88.7	3	41	1.1× / 3.8
Missiles · Black Seasurge	4	73.6	2	30	5.0× / 0.8
Cable ops · Gulf of Mexicosurge	4	63.1	3	63	2.9× / 1.4
Exercises · Arabian Sea	4	61.4	2	34	1.1× / 3.6
Cable ops · Sea of Marmarasurge	4	61.3	4	42	20× / 0.2
Other · North Atlantic Oceansurgelong running	4	59.4	3	962	20× / 0.2
Incidents · Arabian Seasurge	4	45.5	2	35	4.0× / 1
Incidents · Mediterranean Sea - Western Basinsurge	4	32.4	1	60	4.0× / 1
Exercises · South China Sea	4	25.2	2	19	1.0× / 4
Incidents · Gulf of Thailandsurge	4	24.4	1	21	5.0× / 0.8
Surveys · Celtic Seasurge	4	19.4	1	31	20× / 0.2
Exercises · Mediterranean Sea - Eastern Basin	4	11.7	0	—	0.8× / 5
Nav aids · Indian Oceanlong running	3	128.3	5	862	1.9× / 1.6
Nav aids · Celtic Seasurgelong running	3	63.4	2	1,344	5.0× / 0.6
Surveys · Sea of Okhotsksurge	3	58.6	3	23	2.5× / 1.2
Cable ops · Celtic Seasurge	3	30.4	0	—	3.0× / 1
Incidents · Java Seasurge	3	9.5	0	—	3.8× / 0.8
Derelicts · Caribbean Seasurge	3	9	0	—	5.0× / 0.6
Quakes · Philippine Sea	3	9	0	—	1.1× / 2.6
Exercises · Gulf of Mexicosurge	3	7.8	1	51	2.1× / 1.4
Exercises · Bering Seasurge	3	3.1	0	—	3.0× / 1
Nav aids · Inner Seas off the West Coast of Scotlandsurge	3	2.5	1	71	2.1× / 1.4
Exercises · Aegean Sea	2	330.3	10	185	2.0× / 1
Restricted · North Sealong running	2	243.2	10	1,561	2.0× / 1
Nav aids · Gulf of Mexicolong running	2	195.8	8	866	0.8× / 2.4
Nav aids · North Pacific Oceanlong running	2	160.1	5	518	0.8× / 2.4
Surveys · Indian Oceannew	2	79.7	2	177	new / 0
Nav aids · Tasman Sea	2	59.6	2	30	2.5× / 0.8
Cable ops · South China Sea	2	50.4	2	80	0.5× / 4.2
Surveys · Caribbean Sea	2	48.4	2	244	5.0× / 0.4
Missiles · Norwegian Sea	2	44.7	2	36	5.0× / 0.4
Ordnance · Black Sea	2	42.9	2	27	2.5× / 0.8
Surveys · Black Sea	2	40.8	0	—	1.4× / 1.4
Cable ops · Indian Ocean	2	36.7	2	140	5.0× / 0.4
Other · Coral Sealong running	2	30.7	1	442	10× / 0.2
Surveys · Laccadive Seanew	2	29.7	2	51	new / 0
Spills · North Pacific Ocean	2	29	2	42	1.1× / 1.8
Other · Davis Strait	2	28.1	2	14	5.0× / 0.4
Other · Arabian Sea	2	27.3	1	24	10× / 0.2
Nav aids · Eastern China Sea	2	26.4	1	26	10× / 0.2
Exercises · Norwegian Seanew	2	18.1	0	—	new / 0
Surveys · Eastern China Seanew	2	11.1	0	—	new / 0
Exercises · Barentsz Sea	2	7.1	0	—	2.0× / 1
Debris · Caribbean Seanew	2	6	0	—	new / 0
Quakes · Indian Ocean	2	6	0	—	0.8× / 2.4
Derelicts · North Atlantic Ocean	2	6	0	—	0.5× / 4.2
Quakes · North Atlantic Ocean	2	6	0	—	5.0× / 0.4
Mines · North Seanew	2	6	0	—	new / 0
Derelicts · Philippine Sea	2	6	0	—	5.0× / 0.4
Debris · South Atlantic Oceannew	2	6	0	—	new / 0
Quakes · Southern Ocean	2	6	0	—	10× / 0.2
Incidents · Molukka Sea	2	5.5	1	4	10× / 0.2
Exercises · Coral Sea	2	5.4	1	13	2.5× / 0.8
Derelicts · North Pacific Ocean	2	5	0	—	0.5× / 4.4
Nav aids · Irish Sea and St. George's Channel	2	4.2	0	—	0.5× / 4
Derelicts · Indian Ocean	2	3	0	—	0.5× / 3.8
Exercises · Caribbean Sea	2	2.5	0	—	5.0× / 0.4
Nav aids · Gulf of Alaska	2	1.8	0	—	5.0× / 0.4
Nav aids · Bay of Bengal	1	136.1	4	261	1.3× / 0.8
Cable ops · Barentsz Sea	1	99	2	66	0.6× / 1.8
Surveys · Persian Gulf	1	96.7	4	108	new / 0
Restricted · Black Sealong running	1	91.2	3	1,121	5.0× / 0.2
Cable ops · Sulu Sea	1	73.6	3	103	new / 0
Nav aids · Sea of Okhotsklong running	1	72.6	3	1,654	1.7× / 0.6
Nav aids · Bass Straitlong running	1	67.4	2	1,186	1.0× / 1
Surveys · Gulf of Mexico	1	60	2	220	1.7× / 0.6
Cable ops · Arabian Sea	1	59.6	1	147	2.5× / 0.4
Other · Sea of Azov	1	59.4	2	89	new / 0
Other · South Atlantic Oceanlong running	1	50.6	2	969	1.3× / 0.8
Structures · North Atlantic Oceanlong running	1	47.3	2	1,045	new / 0
Exercises · Laccadive Sea	1	40.7	1	44	0.6× / 1.6
Surveys · South China Sea	1	39.4	2	41	1.3× / 0.8
Cable ops · Bay of Bengal	1	37	1	147	1.3× / 0.8
Restricted · Sea of Azov	1	32.5	2	63	new / 0
Cable ops · Sea of Okhotsk	1	30.5	2	51	1.0× / 1
Nav aids · English Channel	1	30	1	57	0.4× / 2.8
Exercises · Sea of Okhotsk	1	25.6	1	25	0.8× / 1.2
Cable ops · North Sea	1	25.2	1	25	0.6× / 1.8
Surveys · Gulf of Suez	1	23.6	1	30	2.5× / 0.4
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	1	22	1	22	5.0× / 0.2
Missiles · Celtic Sea	1	20.6	1	20	new / 0
Surveys · Andaman or Burma Sea	1	20.4	0	—	new / 0
Surveys · Bay of Bengal	1	20.1	1	59	new / 0
Surveys · Inner Seas off the West Coast of Scotland	1	19.6	0	—	2.5× / 0.4
Cable ops · Laccadive Sea	1	15.4	0	—	1.7× / 0.6
Derelicts · Arabian Sea	1	14.4	0	—	0.3× / 3
Other · Laccadive Sea	1	14.4	1	14	5.0× / 0.2
Cable ops · English Channel	1	13.4	0	—	5.0× / 0.2
Ordnance · Philippine Sea	1	13.1	0	—	0.8× / 1.2
Cable ops · Red Sea	1	12.8	0	—	new / 0
Spills · Gulf of Alaska	1	11	1	11	1.3× / 0.8
Cable ops · Bass Strait	1	10.2	0	—	new / 0
Restricted · Sea of Okhotsk	1	9.6	1	9	new / 0
Exercises · English Channel	1	9.2	0	—	new / 0
Exercises · South Pacific Ocean	1	9.1	0	—	0.3× / 3.6
Nav aids · East Siberian Sea	1	8.4	1	8	new / 0
Other · Celtic Sea	1	8.3	0	—	new / 0
Nav aids · Gulf of California	1	8.1	1	8	5.0× / 0.2
Nav aids · Arafura Sea	1	7.7	1	7	5.0× / 0.2
Exercises · Indian Ocean	1	7	0	—	1.3× / 0.8
Incidents · Mozambique Channel	1	5	1	4	0.4× / 2.4
Missiles · Laccadive Sea	1	4.5	0	—	0.8× / 1.2
Other · South Pacific Ocean	1	4.1	0	—	2.5× / 0.4
Quakes · Banda Sea	1	3	0	—	new / 0
Quakes · Bismarck Sea	1	3	0	—	2.5× / 0.4
Derelicts · Gulf of Mexico	1	3	0	—	0.7× / 1.4
Debris · Indian Ocean	1	3	0	—	1.3× / 0.8
Derelicts · Laccadive Sea	1	3	0	—	5.0× / 0.2
Incidents · Laccadive Sea	1	3	0	—	2.5× / 0.4
Derelicts · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Quakes · Molukka Sea	1	3	0	—	1.3× / 0.8
Quakes · Solomon Sea	1	3	0	—	0.8× / 1.2
Quakes · South Atlantic Ocean	1	3	0	—	0.5× / 2.2
Debris · South China Sea	1	3	0	—	new / 0
Quakes · South China Sea	1	3	0	—	2.5× / 0.4
Quakes · Tasman Sea	1	3	0	—	new / 0
Derelicts · Tyrrhenian Sea	1	3	0	—	5.0× / 0.2
Missiles · South Pacific Ocean	1	2.1	1	2	0.8× / 1.2
Exercises · Celtic Sea	1	2	0	—	2.5× / 0.4
Missiles · South Atlantic Ocean	1	2	0	—	0.8× / 1.2
Cable ops · Strait of Gibraltar	1	1.8	0	—	1.3× / 0.8
Containers · Tasman Sea	1	1.7	0	—	5.0× / 0.2
Containers · Arabian Sea	1	1.6	1	1	0.6× / 1.8
Derelicts · South China Sea	1	1.6	1	1	0.8× / 1.2
Exercises · Persian Gulf	1	1.4	0	—	5.0× / 0.2
Missiles · South China Sea	1	1.2	0	—	new / 0
Spills · Bering Sea	1	1	1	1	2.5× / 0.4
Incidents · Tyrrhenian Sea	1	1	0	—	2.5× / 0.4
Incidents · Malacca Strait	1	0.9	0	—	5.0× / 0.2
Other · Mediterranean Sea - Western Basin	1	0.9	0	—	new / 0
Piracy · South China Sea	1	0.9	1	0	1.0× / 1
Other · Mediterranean Sea - Eastern Basin	1	0.8	0	—	0.8× / 1.2
Nav aids · Timor Sea	1	0.6	0	—	1.7× / 0.6
Incidents · Balearic (Iberian Sea)	1	0.5	1	0	new / 0
Incidents · Arafura Sea	1	0.4	0	—	5.0× / 0.2
Other · Bering Sea	1	0.4	0	—	5.0× / 0.2
Other · Indian Ocean	1	0.2	0	—	1.3× / 0.8
Incidents · Coral Sea	1	0.1	0	—	0.2× / 5.8
Surveys · Beaufort Sealong running	0	240	8	2,150	— / 0
Wrecks · Arabian Sealong running	0	180	6	1,004	0.0× / 0.8
Surveys · Arctic Oceanlong running	0	180	6	2,075	— / 0
Wrecks · South China Sealong running	0	150	5	780	0.0× / 0.2
Surveys · Davis Strait	0	120	4	277	— / 0
Exercises · Ionian Sea	0	90	3	180	— / 0
Ordnance · Sea of Azov	0	90	3	90	0.0× / 0.8
Wrecks · Solomon Sealong running	0	90	3	478	— / 0
Other · South China Sealong running	0	90	3	582	0.0× / 0.6
Nav aids · Arabian Sealong running	0	60	2	430	0.0× / 1.2
Wrecks · Caribbean Sealong running	0	60	2	625	— / 0
Wrecks · English Channel	0	60	2	303	0.0× / 0.4
Nav aids · Great Australian Bightlong running	0	60	2	484	0.0× / 1.6
Wrecks · Irish Sea and St. George's Channellong running	0	60	2	377	0.0× / 0.6
Nav aids · Kara Sea	0	60	2	161	— / 0
Nav aids · Laccadive Sea	0	60	2	198	0.0× / 0.6
Nav aids · Malacca Strait	0	60	2	248	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	60	2	1,863	— / 0
Volcanic · Philippine Sealong running	0	60	2	1,523	0.0× / 0.4
Surveys · The Northwestern Passageslong running	0	60	2	1,424	— / 0
Missiles · Aegean Sea	0	30	1	181	— / 0

Cite: seahazards.com Sea Ledger, 2016-06, 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.