Sea Ledger, May 2016

2016-05-01 to 2016-05-31 · archive

issued: 604
warning-days in force: 11,113
in force at month end: 357
sea × type cells: 228

baseline: same month, previous 5 years (2015-05, 2014-05, 2013-05, 2012-05, 2011-05)

By type

type	issued	warning-days	in force at end
Incidents	150	873.1	25
Exercises	116	1,403.5	43
Nav aids	71	2,857	94
Icebergs	62	97	3
Missiles	39	247.5	11
Cable ops	38	1,142.1	36
Surveys	28	1,625.6	53
Quakes	27	76.4	4
Spills	17	254	9
Derelicts	16	101.7	2
Other	15	478.4	15
Debris	7	19.7	2
Piracy	6	52.9	0
Ordnance	6	199.7	7
Restricted	3	478.5	14
Wrecks	3	926.6	30
War risk	0	62	2
Volcanic	0	124	4
Structures	0	93	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	31	37.5	2	32	3.9× / 8
Incidents · North Pacific Ocean	28	62.9	1	38	1.1× / 25.6
Icebergs · South Atlantic Oceansurge	25	43.3	1	33	42× / 0.6
Exercises · North Pacific Ocean	23	150.3	6	64	1.4× / 16.4
Incidents · North Atlantic Ocean	21	144.3	6	78	1.2× / 18
Incidents · Mediterranean Sea - Eastern Basinsurge	18	81.2	4	42	2.0× / 9
Incidents · South China Sea	17	149.6	3	42	1.9× / 9.2
Exercises · Yellow Sea	15	109.3	3	31	1.4× / 10.6
Exercises · Black Seasurge	14	107	3	32	3.0× / 4.6
Nav aids · Coral Seasurgelong running	11	142.3	5	774	2.5× / 4.4
Incidents · South Atlantic Oceansurge	11	50.1	1	36	2.3× / 4.8
Nav aids · North Sea	10	241.1	11	287	1.2× / 8.4
Exercises · South Pacific Oceansurge	10	38.3	2	31	2.1× / 4.8
Missiles · North Atlantic Ocean	10	31	1	30	1.5× / 6.6
Incidents · South Pacific Ocean	9	80	1	52	1.0× / 9
Exercises · Arabian Sea	8	91.3	3	34	1.3× / 6.4
Cable ops · North Atlantic Ocean	8	79.5	5	86	1.5× / 5.2
Quakes · South Pacific Ocean	8	22.7	1	29	0.8× / 10.4
Quakes · North Pacific Ocean	8	22.6	1	32	0.9× / 8.6
Cable ops · Norwegian Seasurge	7	192.9	7	37	3.9× / 1.8
Spills · North Pacific Oceansurge	7	91	4	34	2.2× / 3.2
Exercises · Bay of Bengal	7	60.8	2	30	1.5× / 4.6
Missiles · North Pacific Ocean	7	27.1	0	—	1.1× / 6.6
Derelicts · Indian Ocean	7	18.5	0	—	1.5× / 4.6
Nav aids · Indian Oceansurgelong running	6	132.5	5	832	3.3× / 1.8
Incidents · Gulf of Mexico	6	89.8	2	56	1.4× / 4.2
Missiles · Black Seasurge	6	62.7	3	32	4.3× / 1.4
Missiles · Norwegian Seasurge	6	41.8	4	25	4.3× / 1.4
Exercises · Caribbean Seasurge	6	37	1	29	10× / 0.6
Exercises · Mediterranean Sea - Eastern Basin	6	33.8	0	—	1.2× / 5
Incidents · Arabian Seasurge	6	24.1	2	12	15× / 0.4
Ordnance · North Seasurge	5	75.5	4	266	8.3× / 0.6
Spills · Gulf of Mexico	5	74	2	42	1.4× / 3.6
Spills · North Atlantic Oceansurge	5	58	2	26	2.3× / 2.2
Nav aids · Inner Seas off the West Coast of Scotlandsurge	5	32.8	1	41	6.3× / 0.8
Missiles · Barentsz Seasurge	5	29.5	1	34	2.8× / 1.8
Icebergs · Southern Oceansurge	5	15	0	—	8.3× / 0.6
Exercises · Bering Seasurge	5	6	0	—	2.3× / 2.2
Nav aids · North Atlantic Oceanlong running	4	303.9	10	1,105	0.7× / 5.4
Nav aids · Gulf of Mexicolong running	4	219	7	836	1.2× / 3.4
Surveys · South Atlantic Ocean	4	173.8	5	186	0.9× / 4.2
Cable ops · Bay of Bengalsurge	4	97.7	2	152	2.2× / 1.8
Incidents · Mediterranean Sea - Western Basinnew	4	76	2	30	new / 0
Piracy · Gulf of Guineasurge	4	45	0	—	2.9× / 1.4
Surveys · Mediterranean Sea - Eastern Basinsurge	4	41.3	2	50	2.2× / 1.8
Surveys · North Seanew	4	17.8	1	45	new / 0
Quakes · Philippine Sea	4	12	0	—	1.8× / 2.2
Nav aids · South Atlantic Ocean	3	375.2	9	179	0.5× / 6.4
Wrecks · South China Seasurgelong running	3	151.6	5	750	7.5× / 0.4
Nav aids · North Pacific Oceanlong running	3	132	5	488	1.0× / 3
Cable ops · Barentsz Seasurge	3	124	4	41	5.0× / 0.6
Cable ops · Arabian Seasurge	3	94.5	2	117	2.1× / 1.4
Nav aids · Bass Straitsurgelong running	3	77.5	3	1,156	15× / 0.2
Cable ops · Gulf of Mexico	3	68	2	57	1.1× / 2.6
Exercises · Gulf of Mexicosurge	3	63.6	3	21	3.0× / 1
Exercises · Laccadive Sea	3	45.5	2	30	1.5× / 2
Cable ops · Sea of Marmaranew	3	43.4	2	40	new / 0
Other · North Atlantic Oceanlong running	3	37.2	2	932	1.3× / 2.4
Nav aids · English Channel	3	33.6	1	69	1.4× / 2.2
Restricted · Barentsz Seanew	3	13.9	0	—	new / 0
Exercises · Baltic Sea	3	9.5	0	—	1.7× / 1.8
Incidents · Bay of Bengalsurge	3	7.7	0	—	2.1× / 1.4
Incidents · Davis Straitsurge	3	6	1	20	3.0× / 1
Derelicts · Tasman Seasurge	3	5.4	0	—	7.5× / 0.4
Other · Tasman Seasurge	3	3.2	0	—	5.0× / 0.6
Nav aids · Gulf of Alaskasurge	3	2.6	0	—	7.5× / 0.4
Incidents · Indian Ocean	3	1.1	0	—	0.3× / 9.8
Incidents · Philippine Sea	3	0.6	0	—	0.8× / 3.8
Incidents · Coral Sea	3	0.3	0	—	0.6× / 5.2
Surveys · Arabian Sea	2	99.2	3	61	5.0× / 0.4
Nav aids · Celtic Sealong running	2	90.6	2	1,314	3.3× / 0.6
Exercises · Philippine Sea	2	72	2	34	0.4× / 5.4
Nav aids · Arabian Sealong running	2	64.9	2	400	3.3× / 0.6
Surveys · Bay of Bengal	2	63.7	1	68	5.0× / 0.4
Cable ops · Mediterranean Sea - Eastern Basin	2	48.8	0	—	1.3× / 1.6
Exercises · North Atlantic Ocean	2	35.3	1	57	0.6× / 3.4
Derelicts · South Pacific Oceanlong running	2	33.5	1	1,434	0.8× / 2.4
Incidents · Caribbean Sea	2	32	0	—	0.5× / 4.2
Nav aids · Gulf of Sueznew	2	27.2	2	42	new / 0
Other · Arafura Sea	2	26.7	1	26	10× / 0.2
Exercises · Barentsz Sea	2	8.5	0	—	3.3× / 0.6
Surveys · Coral Seanew	2	7.9	0	—	new / 0
Incidents · Gulf of Thailand	2	7.4	0	—	5.0× / 0.4
Exercises · Coral Sea	2	6.3	0	—	2.0× / 1
Surveys · Japan Seanew	2	6.2	0	—	new / 0
Derelicts · Caribbean Sea	2	6	0	—	3.3× / 0.6
Debris · Timor Seanew	2	6	0	—	new / 0
Incidents · Timor Sea	2	5.9	0	—	2.0× / 1
Quakes · Eastern China Seanew	2	3.8	1	4	new / 0
Incidents · Java Sea	2	3.8	0	—	5.0× / 0.4
Incidents · Tasman Sea	2	0.4	0	—	1.1× / 1.8
Exercises · Aegean Sea	1	337.2	11	155	0.7× / 1.4
Surveys · North Atlantic Oceanlong running	1	179.2	5	728	0.3× / 3
Nav aids · Bay of Bengal	1	155	5	239	2.5× / 0.4
Ordnance · Sea of Azov	1	124.2	3	60	new / 0
Nav aids · Great Australian Bightlong running	1	77.1	2	454	5.0× / 0.2
Exercises · South China Sea	1	74.2	0	—	0.3× / 4
Surveys · Gulf of Mexico	1	56	2	190	new / 0
Nav aids · Mediterranean Sea - Western Basin	1	39.6	1	61	1.3× / 0.8
Other · Coral Sealong running	1	32	1	412	2.5× / 0.4
Other · Inner Seas off the West Coast of Scotland	1	31	1	45	new / 0
Other · North Sea	1	31	1	52	0.5× / 2.2
Cable ops · Sea of Okhotsk	1	21.6	1	21	1.7× / 0.6
Surveys · Laccadive Sea	1	21.5	1	21	new / 0
Surveys · Black Sea	1	14.5	1	14	0.6× / 1.8
Exercises · Sea of Okhotsk	1	13.2	0	—	new / 0
Surveys · Gulf of Suez	1	12.6	1	38	1.7× / 0.6
Cable ops · Bass Strait	1	12.1	1	12	new / 0
Other · Mediterranean Sea - Eastern Basin	1	11.3	0	—	2.5× / 0.4
Surveys · South China Sea	1	11.3	1	11	5.0× / 0.2
Incidents · Japan Sea	1	10.4	0	—	new / 0
Nav aids · Philippine Sea	1	8.3	1	8	new / 0
Cable ops · North Sea	1	7.4	0	—	0.3× / 3.6
Missiles · Kara Sea	1	7.2	0	—	2.5× / 0.4
Exercises · South Atlantic Ocean	1	7	0	—	0.1× / 8.2
Cable ops · Tyrrhenian Sea	1	6.9	0	—	5.0× / 0.2
Piracy · Gulf of Aden	1	6.4	0	—	1.3× / 0.8
Quakes · Coral Sea	1	6.2	0	—	0.5× / 2.2
Missiles · Bay of Bengal	1	5.8	0	—	1.7× / 0.6
Missiles · Southern Ocean	1	5.6	0	—	new / 0
Other · South Pacific Ocean	1	5.2	0	—	5.0× / 0.2
Missiles · Laccadive Sea	1	4.8	0	—	1.0× / 1
Exercises · Alboran Sea	1	4.4	1	4	5.0× / 0.2
Nav aids · Bristol Channel	1	4.4	0	—	1.7× / 0.6
Other · English Channel	1	4.4	0	—	new / 0
Quakes · Arabian Sea	1	3	0	—	5.0× / 0.2
Debris · Arafura Sea	1	3	0	—	5.0× / 0.2
Derelicts · Coral Sea	1	3	0	—	1.3× / 0.8
Debris · Indian Ocean	1	3	0	—	2.5× / 0.4
Incidents · Ionian Sea	1	3	0	—	5.0× / 0.2
Debris · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Derelicts · North Atlantic Ocean	1	3	0	—	0.2× / 4.8
Quakes · South Atlantic Ocean	1	3	0	—	0.5× / 2
Quakes · Southern Ocean	1	3	0	—	5.0× / 0.2
Other · Davis Strait	1	2.8	0	—	new / 0
Surveys · Eastern China Sea	1	2.8	1	2	new / 0
Incidents · Makassar Strait	1	2.8	0	—	new / 0
Debris · English Channel	1	2.6	1	2	new / 0
Debris · South Pacific Ocean	1	2.1	1	2	5.0× / 0.2
Nav aids · Andaman or Burma Sea	1	2	0	—	2.5× / 0.4
Nav aids · Persian Gulf	1	1.8	0	—	new / 0
Piracy · Bay of Bengal	1	1.5	0	—	new / 0
Cable ops · Celtic Sea	1	1.3	1	1	1.7× / 0.6
Surveys · Celtic Sea	1	1.3	1	1	0.6× / 1.6
Icebergs · Labrador Sea	1	1.2	0	—	0.1× / 17.2
Missiles · Baffin Bay	1	1	1	1	new / 0
Nav aids · Irish Sea and St. George's Channel	1	1	0	—	0.4× / 2.4
Incidents · Solomon Sea	1	0.7	0	—	1.7× / 0.6
Incidents · Persian Gulf	1	0.4	1	0	new / 0
Nav aids · Tasman Sea	1	0.3	1	0	2.5× / 0.4
Quakes · Gulf of Alaska	1	0.1	1	0	1.3× / 0.8
Nav aids · Arafura Sea	1	0	0	—	5.0× / 0.2
Nav aids · Caribbean Sealong running	0	251.7	8	841	0.0× / 0.6
Surveys · Beaufort Sealong running	0	248	8	2,120	— / 0
Restricted · North Sealong running	0	248	8	1,531	0.0× / 0.6
Wrecks · Arabian Sealong running	0	186	6	974	0.0× / 0.4
Surveys · Arctic Oceanlong running	0	186	6	2,045	— / 0
Surveys · Davis Strait	0	124	4	247	0.0× / 0.2
Restricted · Black Sealong running	0	123.6	3	1,091	— / 0
Surveys · Persian Gulf	0	93.4	3	78	0.0× / 0.4
Exercises · Ionian Sea	0	93	3	150	— / 0
Wrecks · Solomon Sealong running	0	93	3	448	— / 0
Other · South China Sealong running	0	93	3	552	0.0× / 0.8
Surveys · Indian Ocean	0	70.4	2	147	0.0× / 1
Wrecks · Caribbean Sealong running	0	62	2	595	— / 0
Wrecks · English Channel	0	62	2	273	0.0× / 0.2
Wrecks · Irish Sea and St. George's Channel	0	62	2	347	— / 0
Nav aids · Kara Sea	0	62	2	131	0.0× / 0.2
Nav aids · Laccadive Sea	0	62	2	168	0.0× / 0.4
Nav aids · Malacca Strait	0	62	2	218	0.0× / 0.2
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	1,833	0.0× / 1
Volcanic · Philippine Sealong running	0	62	2	1,493	0.0× / 0.4
Nav aids · Sea of Okhotsklong running	0	62	2	1,624	— / 0
Cable ops · South China Sea	0	62	2	50	0.0× / 3.6
Cable ops · Sulu Sea	0	62	2	73	— / 0
Surveys · The Northwestern Passageslong running	0	62	2	1,394	— / 0
Cable ops · Indian Ocean	0	55.5	1	110	0.0× / 0.4
Nav aids · Singapore Straitlong running	0	49.5	1	383	0.0× / 0.2
Surveys · Caribbean Sea	0	45	1	214	— / 0
Cable ops · Caribbean Sea	0	36	1	86	0.0× / 0.2
Missiles · Aegean Sea	0	31	1	151	0.0× / 0.6
Nav aids · Alboran Sea	0	31	1	70	— / 0
Incidents · Alboran Sea	0	31	1	32	— / 0
Cable ops · Andaman or Burma Sea	0	31	1	78	— / 0
Wrecks · Andaman or Burma Sea	0	31	1	243	— / 0
Surveys · Bering Sea	0	31	1	330	— / 0
Other · Black Sea	0	31	1	149	— / 0
Other · Caribbean Sealong running	0	31	1	497	— / 0
Spills · Caribbean Sea	0	31	1	109	0.0× / 0.2
Volcanic · Caribbean Sea	0	31	1	313	— / 0
Wrecks · Celtic Sea	0	31	1	274	— / 0
Other · Chukchi Sea	0	31	1	230	— / 0
Volcanic · Eastern China Sealong running	0	31	1	368	0.0× / 0.4
Wrecks · Great Australian Bight	0	31	1	48	— / 0
Wrecks · Gulf of California	0	31	1	216	— / 0
Wrecks · Gulf of Guinealong running	0	31	1	376	0.0× / 0.8
Wrecks · Gulf of Mexicolong running	0	31	1	421	0.0× / 0.2
Other · Gulf of Suez	0	31	1	344	— / 0
Wrecks · Kara Sea	0	31	1	57	— / 0
Structures · Makassar Strait	0	31	1	231	— / 0

Cite: seahazards.com Sea Ledger, 2016-05, 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.