Sea Ledger, July 2022

2022-07-01 to 2022-07-31 · archive

issued: 667
warning-days in force: 10,972
in force at month end: 354
sea × type cells: 210

baseline: same month, previous 5 years (2021-07, 2020-07, 2019-07, 2018-07, 2017-07)

By type

type	issued	warning-days	in force at end
Incidents	116	1,357.8	34
Exercises	104	1,050.9	35
Icebergs	93	107.9	4
Nav aids	73	3,611.6	122
Surveys	65	2,006.9	65
Missiles	51	386.6	11
Derelicts	47	262.9	6
Quakes	31	92.2	2
Towing	27	26.6	1
Spills	14	226.7	7
Cable ops	13	276.8	12
Other	10	288.9	11
Wrecks	10	859.2	30
Debris	7	50.1	1
Structures	2	5.3	2
Restricted	2	36.1	1
Piracy	1	11.9	0
Ordnance	1	34.9	1
Mines	0	62	2
War risk	0	31	1
Volcanic	0	186	6

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · Southern Ocean	34	33.2	2	31	1.4× / 24
Exercises · North Pacific Ocean	31	254.3	14	65	1.3× / 23.6
Icebergs · Labrador Sea	31	36.1	2	32	1.1× / 28.8
Towing · North Pacific Oceannew	27	26.6	1	26	new / 0
Icebergs · South Atlantic Ocean	23	23.6	0	—	0.9× / 26.2
Missiles · South Pacific Oceansurge	21	138.2	2	48	4.2× / 5
Incidents · South China Sea	20	246.3	6	149	0.8× / 26
Incidents · North Atlantic Ocean	17	395.8	9	170	1.5× / 11.2
Quakes · South Pacific Ocean	16	48	0	—	1.7× / 9.4
Exercises · Bay of Bengal	15	89	1	41	1.7× / 8.8
Surveys · South Atlantic Ocean	14	111.2	5	33	0.8× / 17
Nav aids · North Atlantic Oceansurgelong running	12	354.1	9	472	3.0× / 4
Exercises · South Atlantic Ocean	12	104.9	3	35	1.5× / 8.2
Nav aids · South Atlantic Oceansurge	11	768	26	193	2.1× / 5.2
Missiles · North Atlantic Ocean	11	96.5	3	44	1.3× / 8.8
Incidents · North Pacific Ocean	10	82.9	1	44	0.5× / 20.2
Incidents · South Pacific Ocean	10	39	3	44	1.6× / 6.2
Nav aids · North Pacific Oceanlong running	9	387.9	12	485	2.0× / 4.6
Incidents · Indian Oceansurge	9	70.8	3	43	2.1× / 4.2
Incidents · Caribbean Seasurge	9	70.2	2	40	2.3× / 4
Surveys · North Atlantic Ocean	8	590.8	18	215	0.8× / 9.6
Nav aids · South Pacific Oceanlong running	8	574.8	22	422	1.5× / 5.2
Surveys · Persian Gulfsurgelong running	8	314	9	559	2.7× / 3
Nav aids · North Sea	8	113.4	4	52	1.1× / 7.6
Exercises · North Atlantic Oceansurge	8	49.8	1	81	2.0× / 4
Derelicts · North Atlantic Oceansurge	8	31.2	0	—	2.5× / 3.2
Derelicts · North Pacific Oceansurge	7	43.6	1	24	12× / 0.6
Derelicts · Caribbean Seasurge	7	18.3	0	—	5.8× / 1.2
Surveys · Kara Sea	6	147.5	7	33	1.6× / 3.8
Incidents · Mediterranean Sea - Eastern Basin	6	70.9	2	45	1.3× / 4.8
Incidents · Gulf of Mexico	6	66.4	3	24	1.8× / 3.4
Exercises · Arabian Sea	6	48.2	0	—	1.8× / 3.4
Exercises · Andaman or Burma Seasurge	6	27.4	1	27	2.7× / 2.2
Exercises · Gulf of Mexicosurge	6	27.2	3	18	4.3× / 1.4
Missiles · North Pacific Oceanlong running	5	47.2	1	411	1.1× / 4.4
Surveys · Caribbean Seasurge	5	40.1	1	31	25× / 0.2
Derelicts · Arabian Seasurge	5	11.4	0	—	8.3× / 0.6
Surveys · Norwegian Sea	4	95.4	3	72	0.9× / 4.6
Exercises · Barentsz Seasurge	4	73	2	92	2.9× / 1.4
Exercises · Japan Seasurge	4	50.9	1	38	3.3× / 1.2
Incidents · South Atlantic Ocean	4	31.3	2	49	0.4× / 11.2
Derelicts · Gulf of Mexicosurge	4	29.5	0	—	20× / 0.2
Exercises · South Pacific Ocean	4	23.8	0	—	0.6× / 6.6
Missiles · Barentsz Sea	4	20.5	2	36	1.5× / 2.6
Missiles · South Atlantic Oceannew	4	19.9	2	14	new / 0
Quakes · Persian Gulfnew	4	12	0	—	new / 0
Quakes · North Pacific Ocean	4	11	1	23	0.7× / 5.6
Derelicts · Coral Seasurge	4	10.4	0	—	10× / 0.4
Debris · Indian Oceansurge	4	10.1	0	—	2.0× / 2
Surveys · North Sea	3	119.6	3	85	0.7× / 4.2
Wrecks · South Atlantic Oceansurge	3	89.8	5	85	2.5× / 1.2
Spills · Gulf of Mexico	3	56	1	40	0.5× / 5.8
Spills · North Atlantic Ocean	3	44.2	2	38	1.9× / 1.6
Nav aids · Arafura Seasurge	3	40.3	2	25	15× / 0.2
Nav aids · Celtic Sea	3	39.4	2	57	1.7× / 1.8
Cable ops · North Pacific Oceansurge	3	38.5	2	31	2.1× / 1.4
Spills · The Coastal Waters of Southeast Alaska and British Columbiasurge	3	31	1	31	2.1× / 1.4
Cable ops · Arabian Seanew	3	26.7	1	33	new / 0
Nav aids · Hudson Baysurge	3	13.1	1	15	7.5× / 0.4
Incidents · Java Sea	3	10.2	0	—	1.7× / 1.8
Icebergs · Kara Seasurge	3	9	0	—	2.1× / 1.4
Surveys · Japan Seasurge	3	7.2	2	6	15× / 0.2
Nav aids · Gulf of Mexicolong running	2	214.2	7	485	0.8× / 2.4
Surveys · Indian Oceanlong running	2	110.2	3	530	1.4× / 1.4
Wrecks · Caribbean Sea	2	99.5	4	281	5.0× / 0.4
Wrecks · Arabian Sealong running	2	89.5	3	373	2.0× / 1
Cable ops · North Atlantic Ocean	2	78.5	3	42	0.3× / 7.2
Nav aids · Persian Gulfnew	2	62.3	3	68	new / 0
Incidents · Arabian Sea	2	53.9	0	—	5.0× / 0.4
Other · South Atlantic Ocean	2	50.7	3	93	2.0× / 1
Surveys · Bay of Bengal	2	48.1	1	52	2.5× / 0.8
Spills · North Pacific Ocean	2	48	1	44	0.5× / 3.8
Other · Hudson Bay	2	42.3	2	21	2.0× / 1
Derelicts · Bay of Bengal	2	37.3	2	44	3.3× / 0.6
Derelicts · Laccadive Sea	2	37	1	39	5.0× / 0.4
Incidents · Arafura Sea	2	36.1	0	—	0.9× / 2.2
Wrecks · Coral Sea	2	34.2	1	30	10× / 0.2
Incidents · The Northwestern Passagesnew	2	31.1	0	—	new / 0
Incidents · Ionian Sea	2	22.2	0	—	3.3× / 0.6
Missiles · East Siberian Seanew	2	18	0	—	new / 0
Other · North Pacific Ocean	2	14.9	0	—	0.3× / 7
Incidents · Philippine Sea	2	14.8	1	16	0.5× / 3.8
Nav aids · Strait of Gibraltarnew	2	8.9	1	10	new / 0
Nav aids · The Northwestern Passages	2	8.4	1	8	2.5× / 0.8
Derelicts · South Atlantic Ocean	2	7.3	0	—	3.3× / 0.6
Quakes · Coral Sea	2	6	0	—	1.0× / 2
Icebergs · Laptev Sea	2	6	0	—	1.0× / 2
Structures · South Atlantic Ocean	2	5.3	2	2	5.0× / 0.4
Restricted · North Sea	2	5.1	0	—	5.0× / 0.4
Exercises · Coral Sea	2	2.7	0	—	1.7× / 1.2
Incidents · Coral Sea	2	0.7	0	—	0.5× / 4
Nav aids · Caribbean Sealong running	1	520.2	17	530	0.3× / 3.2
Nav aids · Arabian Sea	1	65.2	2	277	1.3× / 0.8
Other · Caribbean Sea	1	65	2	276	1.3× / 0.8
Nav aids · Irish Sea and St. George's Channel	1	54.5	1	33	0.7× / 1.4
Other · Arabian Sea	1	47.9	1	325	new / 0
Exercises · Black Sea	1	37.5	2	130	0.0× / 24.4
Cable ops · South Atlantic Ocean	1	34.5	1	44	2.5× / 0.4
Exercises · Caribbean Sea	1	33.4	1	144	0.6× / 1.6
Exercises · Laccadive Sea	1	31.7	0	—	0.5× / 2
Surveys · Arabian Sea	1	31.5	1	39	new / 0
Spills · South Pacific Ocean	1	30.5	1	79	new / 0
Surveys · Barentsz Sea	1	25.7	1	72	0.6× / 1.8
Surveys · Andaman or Burma Sea	1	24	1	24	new / 0
Surveys · Black Sea	1	22.7	1	22	0.7× / 1.4
Incidents · Gulf of Thailand	1	20.1	0	—	1.7× / 0.6
Surveys · South Pacific Ocean	1	18.7	1	18	1.7× / 0.6
Incidents · Banda Sea	1	15.3	0	—	5.0× / 0.2
Wrecks · Bay of Bengal	1	14.1	1	250	2.5× / 0.4
Surveys · Mozambique Channel	1	13.5	0	—	2.5× / 0.4
Cable ops · Norwegian Sea	1	12.4	1	12	new / 0
Incidents · Celtic Sea	1	12.2	1	12	1.7× / 0.6
Surveys · Mediterranean Sea - Western Basin	1	10.4	0	—	1.7× / 0.6
Nav aids · Beaufort Sea	1	9.3	1	9	5.0× / 0.2
Nav aids · Bay of Bengal	1	8	0	—	2.5× / 0.4
Surveys · North Pacific Ocean	1	7.9	0	—	0.7× / 1.4
Piracy · Singapore Strait	1	7	0	—	2.5× / 0.4
Cable ops · Malacca Strait	1	6.9	0	—	new / 0
Incidents · Mozambique Channel	1	6.3	0	—	1.7× / 0.6
Cable ops · Bering Sea	1	5.8	1	5	new / 0
Quakes · South China Sea	1	5.8	0	—	2.5× / 0.4
Other · North Atlantic Ocean	1	5.7	1	33	0.7× / 1.4
Incidents · Strait of Gibraltar	1	5.3	1	5	new / 0
Incidents · Celebes Sea	1	5.2	0	—	5.0× / 0.2
Missiles · North Sea	1	5.1	0	—	new / 0
Spills · Caribbean Sea	1	5	1	5	new / 0
Missiles · Indian Ocean	1	5	0	—	0.3× / 3.8
Nav aids · Coral Sea	1	4.5	0	—	0.3× / 3.2
Missiles · Southern Ocean	1	4.2	0	—	1.3× / 0.8
Ordnance · Persian Gulf	1	3.9	0	—	new / 0
Surveys · English Channel	1	3.6	0	—	5.0× / 0.2
Derelicts · South Pacific Ocean	1	3.6	0	—	0.4× / 2.4
Debris · Arabian Sea	1	3	0	—	5.0× / 0.2
Derelicts · Arafura Sea	1	3	0	—	2.5× / 0.4
Quakes · Greenland Sea	1	3	0	—	5.0× / 0.2
Quakes · Japan Sea	1	3	0	—	5.0× / 0.2
Debris · North Atlantic Ocean	1	3	0	—	2.5× / 0.4
Debris · North Sea	1	3	0	—	5.0× / 0.2
Quakes · Solomon Sea	1	3	0	—	0.5× / 2.2
Incidents · Tasman Sea	1	3	0	—	0.7× / 1.4
Derelicts · Timor Sea	1	3	0	—	2.5× / 0.4
Derelicts · Indian Ocean	1	2.9	0	—	0.3× / 3.2
Exercises · Indian Ocean	1	2.8	1	2	1.0× / 1
Cable ops · Gulf of Thailand	1	2.5	1	2	2.5× / 0.4
Derelicts · Mediterranean Sea - Eastern Basin	1	2.1	1	2	5.0× / 0.2
Nav aids · Bay of Biscay	1	2	1	2	new / 0
Exercises · Persian Gulf	1	2	0	—	new / 0
Surveys · Arctic Ocean	1	1.8	1	1	2.5× / 0.4
Spills · North Sea	1	1	0	—	new / 0
Missiles · South China Sea	1	1	0	—	2.5× / 0.4
Derelicts · South China Sea	1	0.7	1	0	0.6× / 1.8
Quakes · Arabian Sea	1	0.4	1	0	1.3× / 0.8
Other · Gulf of Mexico	1	0.4	0	—	5.0× / 0.2
Exercises · Celtic Sea	1	0.3	0	—	new / 0
Nav aids · Gulf of Alaska	1	0.3	0	—	0.6× / 1.6
Incidents · Molukka Sea	1	0.2	0	—	1.7× / 0.6
Incidents · Solomon Sea	1	0.1	0	—	0.6× / 1.8
Incidents · Bay of Bengal	1	0	0	—	0.5× / 2.2
Volcanic · Philippine Sealong running	0	186	6	590	0.0× / 0.8
Surveys · Sea of Okhotsk	0	133	3	67	0.0× / 2.6
Wrecks · South China Sealong running	0	124	4	1,242	0.0× / 1.2
Exercises · Aegean Sea	0	93	3	209	0.0× / 2
Wrecks · Persian Gulflong running	0	93	3	515	0.0× / 0.8
Wrecks · North Sea	0	83.5	2	232	0.0× / 1.4
Nav aids · Andaman or Burma Sealong running	0	62	2	573	0.0× / 0.8
Mines · Black Sea	0	62	2	157	— / 0
Nav aids · Gulf of Californialong running	0	62	2	530	— / 0
Exercises · Ionian Sea	0	62	2	209	— / 0
Wrecks · North Atlantic Oceanlong running	0	62	2	431	— / 0
Cable ops · Persian Gulf	0	62	2	353	0.0× / 0.4
Wrecks · The Northwestern Passages	0	62	2	332	— / 0
Nav aids · English Channel	0	52.5	1	36	0.0× / 2
Nav aids · Indian Ocean	0	38.7	1	178	0.0× / 1
Wrecks · Laccadive Sea	0	34.5	1	298	— / 0
Missiles · Aegean Sea	0	31	1	209	0.0× / 0.2
Surveys · Bay of Biscay	0	31	1	172	0.0× / 0.2
War risk · Black Sea	0	31	1	131	— / 0
Other · Coral Sea	0	31	1	102	0.0× / 1.2
Wrecks · English Channel	0	31	1	38	0.0× / 0.2
Surveys · Gulf of Mexico	0	31	1	110	0.0× / 0.6
Wrecks · Gulf of Mexico	0	31	1	140	— / 0
Surveys · Hudson Bay	0	31	1	347	— / 0
Restricted · Indian Ocean	0	31	1	44	— / 0
Debris · Inner Seas off the West Coast of Scotland	0	31	1	127	— / 0
Nav aids · Inner Seas off the West Coast of Scotland	0	31	1	36	0.0× / 2.6
Nav aids · Laccadive Sea	0	31	1	47	0.0× / 0.2
Surveys · Laccadive Sea	0	31	1	169	— / 0
Nav aids · Mediterranean Sea - Eastern Basinlong running	0	31	1	424	0.0× / 0.4
Ordnance · North Sea	0	31	1	178	0.0× / 2
Other · Southern Ocean	0	31	1	170	— / 0
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	0	31	1	137	0.0× / 0.4
Incidents · Tyrrhenian Sea	0	29.1	0	—	0.0× / 0.4
Exercises · Philippine Sea	0	27.8	0	—	0.0× / 5.6
Derelicts · Celtic Sea	0	21.6	0	—	0.0× / 0.8
Nav aids · Davis Strait	0	17.8	0	—	0.0× / 0.2
Incidents · Laccadive Sea	0	17.8	0	—	0.0× / 0.6
Spills · Bering Sea	0	11	0	—	0.0× / 1.2
Wrecks · Singapore Strait	0	10.5	0	—	— / 0
Exercises · Chukchi Sea	0	9	0	—	— / 0
Cable ops · Eastern China Sea	0	8	0	—	0.0× / 1.4

Cite: seahazards.com Sea Ledger, 2022-07, 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.