Sea Ledger, May 2019

2019-05-01 to 2019-05-31 · archive

issued: 631
warning-days in force: 10,543
in force at month end: 352
sea × type cells: 219

baseline: same month, previous 5 years (2018-05, 2017-05, 2016-05, 2015-05, 2014-05)

By type

type	issued	warning-days	in force at end
Exercises	124	1,184.8	37
Surveys	93	2,063.1	83
Icebergs	88	96.1	3
Incidents	85	675.8	14
Nav aids	75	2,755.6	88
Quakes	36	99.7	4
Missiles	31	348.8	12
Derelicts	27	104.2	5
Spills	17	229	7
Cable ops	14	283	8
Other	13	456.1	17
Debris	10	29.9	2
Wrecks	6	1,975.3	64
Ordnance	5	46	2
Piracy	4	26.7	1
Restricted	2	103.4	3
Containers	1	3	0
Structures	0	62	2

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Surveys · South Atlantic Oceansurge	31	419.1	16	163	4.1× / 7.6
Icebergs · South Atlantic Oceansurge	30	29.9	1	31	2.6× / 11.6
Incidents · South China Sea	28	231.9	2	41	1.5× / 19.2
Exercises · Mediterranean Sea - Eastern Basinsurge	26	182.4	7	211	4.5× / 5.8
Icebergs · Southern Oceansurge	24	25.6	0	—	2.3× / 10.4
Exercises · North Pacific Ocean	21	124.1	4	65	1.0× / 21.8
Icebergs · Labrador Seasurge	20	22.5	0	—	2.6× / 7.6
Surveys · North Atlantic Oceansurgelong running	18	411.8	17	561	3.8× / 4.8
Nav aids · South Atlantic Oceansurge	15	825.9	25	189	2.0× / 7.4
Icebergs · North Atlantic Ocean	14	17.5	2	24	0.6× / 24.8
Surveys · Arabian Seasurge	13	177.1	11	63	3.6× / 3.6
Quakes · South Pacific Ocean	12	34.3	1	28	1.3× / 9.6
Exercises · Aegean Seasurge	11	246.3	8	154	4.2× / 2.6
Exercises · North Atlantic Oceansurge	11	74.8	2	85	3.2× / 3.4
Incidents · North Pacific Ocean	10	89.3	0	—	0.3× / 29.2
Nav aids · Coral Sea	10	22.7	0	—	1.4× / 7
Exercises · Black Sea	9	124.4	5	94	0.8× / 11
Nav aids · North Atlantic Ocean	7	320.7	12	204	1.2× / 6
Spills · Gulf of Mexico	7	82	4	41	1.3× / 5.4
Exercises · Bay of Bengal	7	68.5	3	41	1.0× / 7
Missiles · Black Seasurge	6	132.5	3	31	2.3× / 2.6
Spills · North Pacific Ocean	6	87	1	44	1.4× / 4.2
Exercises · Arabian Sea	6	58.6	1	34	0.9× / 6.8
Derelicts · Indian Ocean	6	23.4	1	31	1.9× / 3.2
Incidents · Indian Ocean	6	17.5	0	—	0.9× / 6.4
Exercises · Philippine Sea	5	89.8	0	—	1.9× / 2.6
Incidents · South Pacific Ocean	5	32	2	28	0.6× / 8.2
Exercises · South Atlantic Ocean	5	20.7	1	16	1.0× / 5
Exercises · Yellow Sea	5	17.8	1	28	0.4× / 12.2
Quakes · North Pacific Ocean	5	11.1	2	19	0.7× / 7.6
Derelicts · North Pacific Oceansurge	5	8.4	2	32	3.1× / 1.6
Surveys · Persian Gulfsurge	4	195.4	7	46	10× / 0.4
Nav aids · North Sea	4	163.7	5	127	0.5× / 8.4
Nav aids · Gulf of Mexico	4	135.9	5	214	1.2× / 3.4
Incidents · South Atlantic Ocean	4	43.5	0	—	0.7× / 5.6
Surveys · North Sea	4	39.5	2	30	1.8× / 2.2
Missiles · Japan Seasurge	4	39.3	2	36	2.9× / 1.4
Missiles · South Pacific Oceansurge	4	28.2	3	33	10× / 0.4
Incidents · North Atlantic Ocean	4	24.7	2	43	0.2× / 21
Exercises · Andaman or Burma Seasurge	4	18.3	0	—	10× / 0.4
Missiles · North Atlantic Ocean	4	16.6	0	—	0.4× / 10.2
Ordnance · North Sea	4	14.1	1	14	1.3× / 3
Derelicts · Bay of Bengalsurge	4	12	0	—	10× / 0.4
Quakes · Philippine Sea	4	9.6	1	22	1.4× / 2.8
Nav aids · English Channel	4	6.5	0	—	1.3× / 3.2
Surveys · Mediterranean Sea - Eastern Basin	3	174	4	127	0.9× / 3.2
Wrecks · South Atlantic Oceansurge	3	56.1	3	73	7.5× / 0.4
Surveys · Andaman or Burma Seasurge	3	54.7	3	112	3.0× / 1
Surveys · Sea of Okhotsksurge	3	46.6	4	133	15× / 0.2
Missiles · North Pacific Oceanlong running	3	40.2	3	441	0.4× / 7.6
Other · Indian Oceansurge	3	37.9	1	62	7.5× / 0.4
Incidents · Coral Sea	3	30.3	1	33	0.9× / 3.4
Cable ops · North Pacific Oceansurge	3	22	0	—	7.5× / 0.4
Piracy · Gulf of Guinea	3	21	0	—	1.9× / 1.6
Incidents · Philippine Sea	3	19.5	1	34	0.7× / 4.2
Missiles · Indian Ocean	3	14	0	—	1.9× / 1.6
Exercises · South Pacific Ocean	3	13.2	1	20	0.5× / 6.4
Debris · North Atlantic Oceansurge	3	10.7	1	31	7.5× / 0.4
Debris · Indian Oceansurge	3	9.9	0	—	5.0× / 0.6
Derelicts · Mediterranean Sea - Eastern Basinsurge	3	9	0	—	7.5× / 0.4
Quakes · Solomon Sea	3	9	0	—	1.0× / 3
Other · North Atlantic Ocean	3	8.5	0	—	1.3× / 2.4
Exercises · South China Sea	3	8.3	1	9	1.1× / 2.6
Derelicts · South Atlantic Ocean	3	7.4	1	17	1.9× / 1.6
Surveys · Aegean Seasurge	3	6.8	1	16	15× / 0.2
Derelicts · Coral Seasurge	3	6.7	0	—	3.0× / 1
Quakes · Bismarck Seasurge	3	6	0	—	5.0× / 0.6
Nav aids · Davis Straitsurge	3	1.8	1	11	3.8× / 0.8
Nav aids · Caribbean Sealong running	2	356.9	11	479	2.0× / 1
Nav aids · South Pacific Ocean	2	139.8	3	207	1.1× / 1.8
Nav aids · North Pacific Ocean	2	124.3	4	321	0.6× / 3.6
Other · Arabian Sea	2	104.8	5	124	5.0× / 0.4
Wrecks · South Pacific Ocean	2	100.3	4	176	5.0× / 0.4
Nav aids · Mozambique Channel	2	82.5	3	85	2.5× / 0.8
Surveys · Norwegian Sea	2	69.9	3	32	1.3× / 1.6
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	2	53.8	2	87	1.3× / 1.6
Cable ops · South China Sea	2	47.5	1	43	1.7× / 1.2
Missiles · Aegean Sea	2	44.4	1	154	5.0× / 0.4
Incidents · Mediterranean Sea - Eastern Basin	2	30.5	2	31	0.1× / 22.8
Spills · The Coastal Waters of Southeast Alaska and British Columbia	2	28	0	—	5.0× / 0.4
Nav aids · Gulf of Alaska	2	27.1	1	78	2.0× / 1
Nav aids · Inner Seas off the West Coast of Scotland	2	26.7	1	24	0.7× / 2.8
Incidents · Yellow Seanew	2	25.9	2	12	new / 0
Incidents · Eastern China Sea	2	23.5	0	—	1.0× / 2
Spills · North Atlantic Ocean	2	16	2	14	0.8× / 2.4
Incidents · Java Sea	2	15.1	0	—	2.5× / 0.8
Exercises · Indian Ocean	2	9.9	0	—	3.3× / 0.6
Quakes · Coral Sea	2	6	0	—	1.3× / 1.6
Debris · South Pacific Ocean	2	3.3	1	18	5.0× / 0.4
Exercises · Red Sea	2	3.1	0	—	5.0× / 0.4
Nav aids · Timor Seanew	2	2.5	0	—	new / 0
Incidents · Tasman Sea	2	0.5	0	—	1.7× / 1.2
Wrecks · South China Sea	1	363.3	12	144	1.0× / 1
Nav aids · Indian Ocean	1	70.6	3	66	0.4× / 2.4
Nav aids · Andaman or Burma Sea	1	56	2	182	1.7× / 0.6
Cable ops · Persian Gulf	1	52	2	46	1.0× / 1
Surveys · Gulf of Guinea	1	43.9	1	137	1.3× / 0.8
Nav aids · Mediterranean Sea - Western Basin	1	40.1	1	120	1.3× / 0.8
Surveys · North Pacific Ocean	1	36.6	2	52	5.0× / 0.2
Restricted · South Atlantic Ocean	1	36.5	1	150	new / 0
Cable ops · Arabian Sea	1	34.4	0	—	0.6× / 1.6
Nav aids · Arabian Sea	1	34.1	1	59	0.4× / 2.8
Derelicts · South Pacific Ocean	1	34	1	92	0.7× / 1.4
Nav aids · Aegean Sea	1	32.8	1	59	new / 0
Ordnance · Black Sea	1	31.9	1	31	new / 0
Exercises · Laccadive Sea	1	31.1	1	31	0.5× / 2
Nav aids · Laccadive Sea	1	29.1	1	35	1.0× / 1
Other · Inner Seas off the West Coast of Scotland	1	24.5	1	24	5.0× / 0.2
Incidents · Arabian Sea	1	22.5	0	—	0.5× / 2.2
Cable ops · Caribbean Sea	1	20.5	1	20	5.0× / 0.2
Cable ops · North Sea	1	20	1	20	0.3× / 3.2
Exercises · Japan Sea	1	18.1	0	—	new / 0
Surveys · Bay of Bengal	1	17.6	1	17	1.7× / 0.6
Other · North Sea	1	17.5	1	17	0.6× / 1.6
Surveys · Mozambique Channel	1	17.3	0	—	new / 0
Surveys · Bass Strait	1	16.5	1	16	new / 0
Incidents · Gulf of Thailand	1	16.2	0	—	1.3× / 0.8
Incidents · Bay of Bengal	1	14.9	0	—	0.5× / 2
Nav aids · Celtic Sea	1	9.7	0	—	1.7× / 0.6
Surveys · Laccadive Sea	1	9.4	0	—	2.5× / 0.4
Surveys · Philippine Sea	1	9.4	1	9	5.0× / 0.2
Other · North Pacific Ocean	1	9.3	1	9	1.0× / 1
Missiles · South Atlantic Ocean	1	9	0	—	5.0× / 0.2
Missiles · Barentsz Sea	1	8.4	0	—	0.3× / 4
Cable ops · Aegean Sea	1	7	0	—	5.0× / 0.2
Incidents · Japan Sea	1	6.5	1	6	5.0× / 0.2
Exercises · Barentsz Sea	1	6.4	0	—	0.6× / 1.6
Missiles · Norwegian Sea	1	6.2	0	—	0.5× / 2
Incidents · Solomon Sea	1	6	0	—	2.5× / 0.4
Missiles · Southern Ocean	1	5.8	0	—	5.0× / 0.2
Piracy · Celebes Sea	1	5.7	1	5	new / 0
Restricted · Black Sea	1	4.9	0	—	new / 0
Surveys · Alboran Sea	1	4.3	0	—	new / 0
Cable ops · Irish Sea and St. George's Channel	1	4	0	—	2.5× / 0.4
Missiles · Bay of Bengal	1	3.7	0	—	1.3× / 0.8
Cable ops · Bay of Bengal	1	3.6	1	51	1.3× / 0.8
Cable ops · Bristol Channel	1	3.3	0	—	5.0× / 0.2
Nav aids · Irish Sea and St. George's Channel	1	3.1	0	—	0.5× / 2
Quakes · Bay of Bengal	1	3	0	—	5.0× / 0.2
Quakes · Celebes Sea	1	3	0	—	5.0× / 0.2
Debris · Celtic Sea	1	3	0	—	new / 0
Quakes · Gulf of Alaska	1	3	0	—	1.7× / 0.6
Containers · Indian Ocean	1	3	0	—	new / 0
Quakes · Indian Ocean	1	3	0	—	0.6× / 1.6
Incidents · Mozambique Channel	1	3	0	—	0.7× / 1.4
Debris · North Pacific Ocean	1	3	0	—	1.3× / 0.8
Quakes · South Atlantic Ocean	1	3	0	—	0.4× / 2.6
Quakes · South China Sea	1	3	0	—	new / 0
Other · South Pacific Ocean	1	3	0	—	2.5× / 0.4
Quakes · Sulu Sea	1	3	0	—	5.0× / 0.2
Derelicts · Timor Sea	1	3	0	—	0.8× / 1.2
Incidents · Barentsz Sea	1	2.7	0	—	new / 0
Cable ops · North Atlantic Ocean	1	2.7	0	—	0.1× / 6.6
Nav aids · Bristol Channel	1	2.2	0	—	1.0× / 1
Exercises · Baltic Sea	1	2	0	—	0.6× / 1.8
Incidents · Davis Strait	1	1.6	1	1	0.8× / 1.2
Surveys · Timor Sea	1	1.6	1	1	new / 0
Incidents · Arafura Sea	1	1.1	0	—	2.5× / 0.4
Other · English Channel	1	1.1	0	—	1.3× / 0.8
Nav aids · Tasman Sea	1	1	0	—	1.0× / 1
Incidents · Great Australian Bight	1	0.4	0	—	5.0× / 0.2
Derelicts · English Channel	1	0.3	0	—	new / 0
Incidents · Bismarck Sea	1	0.2	0	—	2.5× / 0.4
Nav aids · Beaufort Sea	1	0.1	0	—	2.5× / 0.4
Nav aids · Arafura Sea	1	0	0	—	1.7× / 0.6
Incidents · Molukka Sea	1	0	0	—	new / 0
Wrecks · Caribbean Sealong running	0	403	13	854	0.0× / 0.2
Other · Caribbean Sealong running	0	155	5	861	— / 0
Wrecks · North Atlantic Oceanlong running	0	155	5	851	0.0× / 0.2
Wrecks · Arabian Sea	0	139.5	4	123	0.0× / 0.2
Wrecks · Gulf of Mexicolong running	0	124	4	806	0.0× / 0.2
Wrecks · North Sea	0	93	3	116	0.0× / 1
Nav aids · Philippine Sea	0	93	3	86	0.0× / 0.2
Wrecks · Indian Ocean	0	77.5	2	66	— / 0
Wrecks · Bay of Bengal	0	62	2	126	— / 0
Exercises · Ionian Sea	0	62	2	154	— / 0
Wrecks · North Pacific Oceanlong running	0	62	2	714	— / 0
Surveys · Sea of Marmara	0	62	2	50	— / 0
Surveys · South China Sea	0	62	2	50	0.0× / 1
Wrecks · The Northwestern Passages	0	62	2	267	— / 0
Wrecks · English Channel	0	60.6	1	38	0.0× / 0.2
Cable ops · Adriatic Sea	0	31	1	93	— / 0
Nav aids · Bass Strait	0	31	1	65	0.0× / 1.4
Surveys · Bering Sea	0	31	1	56	— / 0
Restricted · Caribbean Sealong running	0	31	1	724	— / 0
Surveys · Gulf of Aden	0	31	1	46	— / 0
Wrecks · Gulf of California	0	31	1	227	— / 0
Surveys · Gulf of Mexico	0	31	1	93	0.0× / 1
Other · Gulf of Thailandlong running	0	31	1	443	— / 0
Other · Irish Sea and St. George's Channel	0	31	1	91	— / 0
Wrecks · Java Sea	0	31	1	67	— / 0
Wrecks · Kara Sea	0	31	1	112	— / 0
Wrecks · Laccadive Sea	0	31	1	88	— / 0
Wrecks · Mediterranean Sea - Western Basin	0	31	1	178	— / 0
Nav aids · Persian Gulf	0	31	1	46	0.0× / 0.2
Restricted · Persian Gulf	0	31	1	44	— / 0
Wrecks · Philippine Sea	0	31	1	116	— / 0
Surveys · Red Sea	0	31	1	46	— / 0
Cable ops · Sea of Okhotsk	0	31	1	245	0.0× / 0.8
Wrecks · Singapore Strait	0	31	1	102	— / 0

Cite: seahazards.com Sea Ledger, 2019-05, 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.