Sea Ledger, May 2015

2015-05-01 to 2015-05-31 · archive

issued: 557
warning-days in force: 9,794
in force at month end: 320
sea × type cells: 241

baseline: same month, previous 5 years (2014-05, 2013-05, 2012-05, 2011-05, 2010-05)

By type

type	issued	warning-days	in force at end
Incidents	152	876.8	35
Exercises	117	1,067.7	28
Nav aids	46	2,428.8	79
Quakes	40	120.6	5
Cable ops	34	1,212.2	40
Icebergs	32	36.6	2
Derelicts	28	180.4	6
Surveys	27	1,340.4	42
Missiles	24	160.8	5
Spills	19	232	8
Other	14	532.4	19
Wrecks	7	1,123.8	35
Restricted	5	166.1	6
Piracy	4	73	2
Ordnance	3	50.4	1
Volcanic	3	44.7	3
Containers	2	6	0
Structures	0	78.8	2
War risk	0	62	2

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Incidents · North Pacific Ocean	34	79.7	8	30	1.7× / 20
Incidents · Mediterranean Sea - Eastern Basinsurge	29	102.9	3	37	8.5× / 3.4
Exercises · North Pacific Oceansurge	26	99.7	2	65	2.1× / 12.6
Exercises · Yellow Seasurge	22	165.4	6	39	3.1× / 7.2
Icebergs · Labrador Sea	17	17.5	1	27	1.2× / 13.8
Incidents · North Atlantic Ocean	16	251.8	11	50	0.8× / 18.8
Icebergs · North Atlantic Oceansurge	14	16.1	1	32	2.7× / 5.2
Quakes · Solomon Seasurge	13	41.4	0	—	9.3× / 1.4
Exercises · South Atlantic Ocean	10	63.3	2	28	1.2× / 8.2
Incidents · South China Sea	9	32.4	0	—	1.1× / 7.8
Exercises · Mediterranean Sea - Eastern Basinsurge	9	30.4	0	—	2.8× / 3.2
Nav aids · South Atlantic Ocean	8	565.8	19	204	1.1× / 7.2
Exercises · Arabian Sea	8	69.6	2	37	1.4× / 5.8
Nav aids · North Sealong running	7	119.1	3	903	0.8× / 8.8
Exercises · Black Seasurge	7	48.4	1	27	2.1× / 3.4
Missiles · North Pacific Ocean	7	32.2	3	30	1.0× / 7.2
Incidents · South Pacific Ocean	7	19	0	—	0.8× / 8.4
Incidents · Philippine Seasurge	7	17.8	0	—	2.3× / 3
Surveys · South Atlantic Ocean	6	178.9	7	305	1.9× / 3.2
Exercises · Philippine Sea	6	87.1	1	35	1.0× / 5.8
Spills · North Pacific Oceansurge	6	80	3	44	2.7× / 2.2
Incidents · Indian Ocean	6	71.6	1	41	0.7× / 9
Incidents · South Atlantic Ocean	6	67.9	0	—	1.3× / 4.8
Spills · Gulf of Mexico	6	55	4	41	1.6× / 3.8
Missiles · North Atlantic Ocean	6	45.6	0	—	0.8× / 7.8
Derelicts · North Atlantic Ocean	6	45.2	1	284	1.5× / 4
Incidents · Gulf of Mexico	6	30.2	3	38	1.6× / 3.8
Nav aids · North Atlantic Oceanlong running	5	191.4	6	787	1.0× / 5
Other · North Atlantic Oceansurgelong running	5	52.9	2	566	2.8× / 1.8
Quakes · Coral Seasurge	5	15	0	—	2.5× / 2
Surveys · Celtic Seasurge	5	14.8	0	—	8.3× / 0.6
Quakes · South Pacific Ocean	5	14	1	33	0.4× / 11.6
Incidents · Coral Sea	5	9.3	0	—	1.1× / 4.6
Exercises · Bay of Bengal	4	62.6	2	35	0.8× / 5
Wrecks · Gulf of Guineanew	4	49.4	1	32	new / 0
Incidents · Caribbean Sea	4	30	1	40	0.9× / 4.4
Incidents · Laccadive Seasurge	4	28.8	2	15	10× / 0.4
Incidents · Bay of Bengalsurge	4	12.6	1	12	5.0× / 0.8
Derelicts · Gulf of Mexicosurge	4	12.2	0	—	5.0× / 0.8
Quakes · Indian Ocean	4	11.6	1	26	1.3× / 3
Exercises · Adriatic Seasurge	4	11.4	0	—	4.0× / 1
Quakes · North Pacific Ocean	4	10.2	1	21	0.5× / 8.4
Derelicts · Indian Ocean	4	9	1	20	1.0× / 4
Cable ops · North Sea	3	146	5	76	0.9× / 3.2
Cable ops · Gulf of Mexicolong running	3	111.7	5	485	0.8× / 3.6
Cable ops · Arabian Sea	3	104	6	139	1.7× / 1.8
Nav aids · Arabian Seasurgelong running	3	102.9	3	410	7.5× / 0.4
Other · North Sealong running	3	91.4	2	611	1.9× / 1.6
Cable ops · Mediterranean Sea - Eastern Basin	3	76.3	4	47	1.7× / 1.8
Cable ops · North Atlantic Ocean	3	58.4	1	70	0.5× / 5.8
Spills · North Atlantic Ocean	3	42	0	—	1.5× / 2
Derelicts · South Pacific Oceanlong running	3	40	1	1,068	1.5× / 2
Surveys · Gulf of Guineanew	3	38.6	0	—	new / 0
Exercises · South Pacific Ocean	3	18.5	0	—	0.7× / 4.4
Cable ops · English Channelsurge	3	10.1	0	—	5.0× / 0.6
Quakes · South Atlantic Oceansurge	3	9	0	—	2.1× / 1.4
Restricted · Red Seanew	3	5.3	0	—	new / 0
Derelicts · North Pacific Ocean	3	5.2	1	33	1.9× / 1.6
Surveys · North Atlantic Ocean	2	145.7	5	362	0.7× / 3
Nav aids · Coral Sealong running	2	133.6	4	408	0.5× / 4.2
Surveys · Indian Ocean	2	127.1	3	141	3.3× / 0.6
Nav aids · Indian Oceanlong running	2	104.3	3	466	1.4× / 1.4
Restricted · North Sealong running	2	98.8	4	1,165	10× / 0.2
Exercises · South China Sea	2	63	1	35	0.5× / 4
Cable ops · Norwegian Sea	2	62	2	42	1.4× / 1.4
Piracy · Persian Gulfnew	2	60.4	2	30	new / 0
Cable ops · South Atlantic Ocean	2	58.8	1	214	0.1× / 26.4
Surveys · Mediterranean Sea - Eastern Basin	2	47.1	1	95	1.1× / 1.8
Exercises · Laccadive Sea	2	41.8	1	34	0.8× / 2.6
Nav aids · Mozambique Channel	2	38.6	2	19	10× / 0.2
Incidents · Arabian Sea	2	33.9	1	38	5.0× / 0.4
Surveys · Black Sea	2	32.8	1	132	1.3× / 1.6
Exercises · Andaman or Burma Sea	2	16	0	—	2.0× / 1
Exercises · North Atlantic Ocean	2	15.3	1	28	0.5× / 4.2
Nav aids · Irish Sea and St. George's Channel	2	14.9	0	—	0.8× / 2.6
Incidents · Adriatic Sea	2	12	1	29	5.0× / 0.4
Exercises · Caribbean Sea	2	10.8	0	—	5.0× / 0.4
Exercises · Baltic Sea	2	9.5	0	—	1.1× / 1.8
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	2	9.5	0	—	0.9× / 2.2
Missiles · Norwegian Sea	2	8.7	0	—	2.0× / 1
Derelicts · Mediterranean Sea - Eastern Basinnew	2	8.6	0	—	new / 0
Missiles · Bay of Bengal	2	4.9	0	—	5.0× / 0.4
Missiles · Black Sea	2	4.5	1	3	2.0× / 1
Quakes · Philippine Sea	2	4.5	1	29	0.8× / 2.4
Cable ops · Sea of Okhotsk	2	4.2	2	3	10× / 0.2
Incidents · Mozambique Channel	2	3.2	0	—	1.4× / 1.4
Volcanic · Eastern China Seanew	2	2.9	1	2	new / 0
Exercises · Norwegian Seanew	2	1.6	0	—	new / 0
Wrecks · Arabian Sealong running	1	190.7	7	773	5.0× / 0.2
Exercises · Aegean Sea	1	179.3	6	149	0.8× / 1.2
Nav aids · Caribbean Sealong running	1	177.7	6	594	2.5× / 0.4
Nav aids · Gulf of Mexicolong running	1	157	5	470	0.2× / 4.4
Wrecks · Persian Gulf	1	121.3	4	91	5.0× / 0.2
Cable ops · South China Sea	1	120.7	2	235	0.3× / 3.8
Nav aids · Kara Sealong running	1	73.2	3	1,362	new / 0
Cable ops · Barentsz Sea	1	72.1	2	38	2.5× / 0.4
Cable ops · Eastern China Sea	1	70.7	2	60	2.5× / 0.4
Other · North Pacific Oceanlong running	1	62.5	2	1,140	5.0× / 0.2
Nav aids · Bass Straitlong running	1	60.4	2	790	new / 0
Wrecks · Gulf of Mexico	1	52.2	1	55	new / 0
Cable ops · Persian Gulf	1	47.7	1	124	0.6× / 1.6
Surveys · Bay of Bengal	1	44.5	1	54	5.0× / 0.2
Volcanic · Philippine Sealong running	1	41.8	2	1,127	5.0× / 0.2
Nav aids · English Channel	1	36.1	1	33	0.4× / 2.4
Nav aids · Laccadive Sealong running	1	35.5	1	765	5.0× / 0.2
Other · Arabian Sea	1	31.5	2	100	5.0× / 0.2
Surveys · Tasman Sea	1	30.4	1	136	5.0× / 0.2
Surveys · Andaman or Burma Sea	1	29.5	1	31	5.0× / 0.2
Cable ops · Japan Sea	1	23.5	1	23	new / 0
Nav aids · Andaman or Burma Sea	1	18.2	0	—	5.0× / 0.2
Nav aids · Malacca Strait	1	17.7	1	17	new / 0
Nav aids · Singapore Strait	1	17.7	1	17	new / 0
Cable ops · Strait of Gibraltar	1	14.1	0	—	5.0× / 0.2
Spills · Caribbean Sea	1	14	0	—	new / 0
Spills · Gulf of St. Lawrence	1	14	0	—	new / 0
Spills · Philippine Sea	1	14	0	—	5.0× / 0.2
Spills · Gulf of Alaska	1	13	1	41	new / 0
Derelicts · Bay of Bengal	1	11.6	1	11	2.5× / 0.4
Cable ops · North Pacific Ocean	1	11.5	0	—	5.0× / 0.2
Ordnance · North Sea	1	11.5	0	—	1.7× / 0.6
Other · Mozambique Channel	1	10.5	1	10	new / 0
Incidents · Tyrrhenian Sea	1	10.4	1	10	2.5× / 0.4
Nav aids · Rio de La Plata	1	9.9	1	9	new / 0
Surveys · Sea of Azov	1	9.4	1	9	2.5× / 0.4
Surveys · Arabian Sea	1	9.3	1	9	5.0× / 0.2
Incidents · Balearic (Iberian Sea)	1	9.3	1	9	new / 0
Missiles · Arabian Sea	1	9.1	0	—	2.5× / 0.4
Nav aids · Mediterranean Sea - Western Basin	1	8.3	0	—	1.7× / 0.6
Incidents · Eastern China Sea	1	8.1	0	—	new / 0
Other · Andaman or Burma Sea	1	8	0	—	2.5× / 0.4
Missiles · Indian Ocean	1	6.7	0	—	1.3× / 0.8
Missiles · Japan Sea	1	6.7	0	—	new / 0
Incidents · Java Sea	1	6.6	0	—	5.0× / 0.2
Piracy · Singapore Strait	1	6.4	0	—	5.0× / 0.2
Missiles · Barentsz Sea	1	6.2	0	—	0.6× / 1.6
Piracy · Malacca Strait	1	6.2	0	—	new / 0
Cable ops · Aegean Sea	1	5.9	0	—	5.0× / 0.2
Ordnance · Persian Gulf	1	5.8	0	—	new / 0
Exercises · Barentsz Sea	1	5.5	0	—	2.5× / 0.4
Quakes · Southern Ocean	1	5.4	0	—	5.0× / 0.2
Exercises · Persian Gulf	1	5.3	0	—	5.0× / 0.2
Missiles · Laccadive Sea	1	5.2	0	—	1.3× / 0.8
Cable ops · Celtic Sea	1	5	0	—	1.7× / 0.6
Incidents · Andaman or Burma Sea	1	4.9	0	—	1.7× / 0.6
Nav aids · Norwegian Sea	1	3.1	0	—	new / 0
Quakes · Bismarck Sea	1	3	0	—	1.7× / 0.6
Containers · Celtic Sea	1	3	0	—	0.7× / 1.4
Derelicts · Coral Sea	1	3	0	—	1.7× / 0.6
Icebergs · Kara Sea	1	3	0	—	new / 0
Derelicts · Mediterranean Sea - Western Basin	1	3	0	—	new / 0
Derelicts · Mozambique Channel	1	3	0	—	new / 0
Containers · South Atlantic Ocean	1	3	0	—	new / 0
Derelicts · South Atlantic Ocean	1	3	0	—	1.0× / 1
Quakes · Tasman Sea	1	3	0	—	new / 0
Derelicts · Timor Sea	1	3	0	—	2.5× / 0.4
Quakes · Gulf of Alaska	1	2.7	1	2	1.7× / 0.6
Cable ops · Gulf of Thailand	1	2.7	1	2	new / 0
Other · Bay of Bengal	1	2.4	1	52	new / 0
Ordnance · Celtic Sea	1	2.1	0	—	new / 0
Incidents · Ionian Sea	1	2.1	0	—	5.0× / 0.2
Other · Philippine Sea	1	1.3	1	1	new / 0
Exercises · Gulf of Mexico	1	1.2	1	31	0.8× / 1.2
Incidents · Solomon Sea	1	0.8	0	—	2.5× / 0.4
Incidents · Davis Strait	1	0.3	0	—	0.8× / 1.2
Incidents · Bismarck Sea	1	0.2	0	—	2.5× / 0.4
Nav aids · Bristol Channel	1	0.2	1	0	1.7× / 0.6
Surveys · Arctic Oceanlong running	0	186	6	1,679	— / 0
Surveys · Beaufort Sealong running	0	155	5	1,754	— / 0
Surveys · Caribbean Sea	0	94.4	3	254	— / 0
Wrecks · Solomon Sea	0	93	3	82	— / 0
Nav aids · South China Sealong running	0	93	3	1,385	0.0× / 0.2
Wrecks · North Atlantic Ocean	0	88.7	2	284	0.0× / 0.4
Nav aids · North Pacific Ocean	0	65.7	2	324	0.0× / 3.4
Cable ops · Gulf of Guinea	0	62	2	105	0.0× / 1
Exercises · Ionian Sea	0	62	2	145	— / 0
Nav aids · Mediterranean Sea - Eastern Basin	0	62	2	149	0.0× / 0.4
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	1,467	0.0× / 1
Wrecks · North Sealong running	0	62	2	811	0.0× / 0.2
Nav aids · Persian Gulflong running	0	62	2	690	— / 0
Nav aids · Sea of Okhotsklong running	0	62	2	1,258	— / 0
Other · South China Sealong running	0	62	2	648	0.0× / 0.8
Wrecks · South China Sealong running	0	62	2	384	0.0× / 0.4
Nav aids · Great Australian Bight	0	32.5	1	88	0.0× / 0.2
Missiles · Aegean Sea	0	31	1	149	0.0× / 0.6
Derelicts · Arabian Sea	0	31	1	93	0.0× / 0.2
Wrecks · Arctic Oceanlong running	0	31	1	646	— / 0
Wrecks · Barentsz Sealong running	0	31	1	403	— / 0
Nav aids · Bay of Bengallong running	0	31	1	450	0.0× / 0.6
Wrecks · Bay of Bengal	0	31	1	292	0.0× / 0.2
Surveys · Bering Sea	0	31	1	331	— / 0
Cable ops · Black Sea	0	31	1	241	0.0× / 0.6
Nav aids · Black Sea	0	31	1	44	— / 0
Restricted · Black Sealong running	0	31	1	725	— / 0
Other · Caribbean Sea	0	31	1	131	— / 0
Wrecks · Caribbean Sea	0	31	1	229	— / 0
Nav aids · Celtic Sealong running	0	31	1	948	0.0× / 1
Incidents · Celtic Sea	0	31	1	47	0.0× / 0.2
Surveys · Chukchi Sea	0	31	1	249	— / 0
Other · Coral Sea	0	31	1	46	0.0× / 0.4
Surveys · Coral Sealong running	0	31	1	585	— / 0

Cite: seahazards.com Sea Ledger, 2015-05, 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.