Sea Ledger, September 2022

2022-09-01 to 2022-09-30 · archive

issued: 796
warning-days in force: 12,989
in force at month end: 433
sea × type cells: 231

baseline: same month, previous 5 years (2021-09, 2020-09, 2019-09, 2018-09, 2017-09)

By type

type	issued	warning-days	in force at end
Exercises	176	1,313.5	39
Incidents	113	1,268.8	36
Icebergs	97	109.2	6
Nav aids	86	4,207.4	140
Surveys	84	2,616.8	92
Missiles	70	388.6	15
Quakes	39	104.5	5
Derelicts	35	244.9	7
Towing	20	20.9	1
Other	18	526.8	19
Cable ops	15	416.2	12
Storms	14	12.3	1
Wrecks	9	1,014.4	36
Spills	9	204.4	5
Debris	8	73.3	3
Volcanic	1	196.8	7
Ordnance	1	60	2
Containers	1	1.6	1
Mines	0	60	2
Structures	0	88.7	2
Restricted	0	30	1
War risk	0	30	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Icebergs · Southern Ocean	41	44.5	2	30	1.7× / 23.6
Surveys · South Atlantic Oceansurge	37	234.1	13	33	2.6× / 14.4
Icebergs · Labrador Sea	30	36.1	2	32	1.3× / 23.8
Exercises · North Pacific Ocean	28	231.4	12	64	1.2× / 23.2
Missiles · South Pacific Oceansurge	27	113.6	8	35	9.0× / 3
Exercises · South Atlantic Ocean	24	192.6	7	92	1.9× / 12.8
Missiles · North Atlantic Oceansurge	24	92.2	3	30	3.6× / 6.6
Icebergs · South Atlantic Ocean	23	22.3	1	23	1.0× / 23.8
Incidents · North Atlantic Oceansurge	22	396.6	12	231	2.9× / 7.6
Incidents · South China Sea	20	167.4	4	210	0.8× / 25.4
Towing · North Pacific Oceansurge	20	20.9	1	31	6.3× / 3.2
Exercises · Bay of Bengal	19	91.7	1	32	1.9× / 10.2
Exercises · Arabian Sea	17	99.8	3	31	1.9× / 8.8
Exercises · Celtic Seanew	16	22.8	0	—	new / 0
Exercises · South Pacific Ocean	14	73	0	—	1.4× / 10.4
Nav aids · North Atlantic Oceansurgelong running	13	316.6	9	533	2.2× / 6
Nav aids · South Atlantic Ocean	12	834	32	185	1.6× / 7.4
Exercises · North Atlantic Ocean	11	79.5	2	43	1.2× / 9.2
Exercises · Bay of Biscaynew	11	15	1	31	new / 0
Nav aids · South Pacific Oceansurgelong running	10	773.7	26	437	2.5× / 4
Incidents · Arafura Seasurge	10	12.6	3	23	17× / 0.6
Surveys · North Atlantic Ocean	9	661.4	23	276	1.7× / 5.4
Incidents · Indian Ocean	9	63.9	1	47	1.8× / 5
Storms · Gulf of Mexico	9	4.2	1	4	1.6× / 5.8
Nav aids · North Sea	8	130.1	5	113	1.6× / 5
Exercises · Japan Seasurge	8	47.1	1	35	5.0× / 1.6
Quakes · South Pacific Ocean	8	25.5	1	32	0.7× / 11
Quakes · Philippine Seasurge	8	22.1	0	—	2.4× / 3.4
Incidents · Coral Sea	8	22	0	—	1.5× / 5.2
Exercises · Barentsz Seasurge	7	116.7	2	153	5.8× / 1.2
Incidents · North Pacific Ocean	7	87.4	5	47	0.4× / 18.4
Surveys · Persian Gulflong running	6	297.7	9	620	1.4× / 4.4
Derelicts · Indian Oceansurge	6	15.3	0	—	2.0× / 3
Quakes · North Pacific Ocean	6	11.3	1	11	0.8× / 7.8
Cable ops · North Atlantic Ocean	5	139.2	5	103	0.9× / 5.8
Incidents · Mediterranean Sea - Eastern Basin	5	79.2	2	49	0.8× / 6.6
Surveys · Arabian Seasurge	5	60.2	3	30	2.1× / 2.4
Missiles · North Pacific Oceanlong running	5	49.6	1	472	0.5× / 10.2
Exercises · Laccadive Seasurge	5	39.8	2	31	2.1× / 2.4
Nav aids · Coral Sea	5	16.7	0	—	1.3× / 3.8
Quakes · Indian Oceansurge	5	12.3	1	32	2.8× / 1.8
Storms · Caribbean Seasurge	5	8.1	0	—	3.1× / 1.6
Nav aids · Caribbean Sealong running	4	643.8	21	591	0.9× / 4.2
Nav aids · North Pacific Oceanlong running	4	390.1	14	546	0.9× / 4.4
Wrecks · The Northwestern Passagessurgelong running	4	142.4	6	393	2.5× / 1.6
Surveys · Bay of Biscaysurge	4	115.1	3	233	6.7× / 0.6
Other · North Atlantic Ocean	4	45.3	3	47	1.8× / 2.2
Incidents · Gulf of Mexicosurge	4	43.7	2	31	4.0× / 1
Incidents · Philippine Sea	4	42.8	1	30	1.8× / 2.2
Surveys · Caribbean Sea	4	30	1	30	1.4× / 2.8
Nav aids · Inner Seas off the West Coast of Scotland	4	27.5	0	—	1.3× / 3
Derelicts · South Pacific Oceansurge	4	9.8	0	—	2.5× / 1.6
Exercises · Caribbean Seasurge	3	55.2	2	44	3.0× / 1
Spills · North Pacific Oceansurge	3	51	1	33	2.1× / 1.4
Missiles · South Atlantic Oceansurge	3	47.9	2	29	7.5× / 0.4
Nav aids · Hudson Baysurge	3	40.8	1	56	15× / 0.2
Spills · Gulf of Mexico	3	35	1	29	0.6× / 5.4
Incidents · South Atlantic Ocean	3	32.9	0	—	0.5× / 6
Nav aids · Indian Ocean	3	28.4	2	111	1.9× / 1.6
Derelicts · Gulf of Mexicosurge	3	20.5	0	—	15× / 0.2
Surveys · South Pacific Oceansurge	3	13.7	1	39	5.0× / 0.6
Exercises · Tasman Seanew	3	12.4	0	—	new / 0
Quakes · South Atlantic Ocean	3	9	0	—	1.0× / 3
Debris · Indian Oceansurge	3	8	0	—	3.0× / 1
Derelicts · Bay of Biscaynew	3	7	0	—	new / 0
Derelicts · Caribbean Seasurge	3	6	0	—	3.8× / 0.8
Derelicts · Celtic Seanew	3	4.5	1	7	new / 0
Missiles · South China Seasurge	3	4.5	0	—	7.5× / 0.4
Nav aids · Strait of Gibraltarnew	3	1.7	0	—	new / 0
Surveys · Indian Oceanlong running	2	157.6	5	591	1.4× / 1.4
Wrecks · South Atlantic Ocean	2	137.1	5	146	2.5× / 0.8
Surveys · North Sea	2	112.8	2	115	0.5× / 3.8
Surveys · Arctic Ocean	2	85.1	2	62	5.0× / 0.4
Other · South Atlantic Ocean	2	72.4	1	154	5.0× / 0.4
Surveys · Barentsz Sea	2	64.1	3	81	1.4× / 1.4
Incidents · Laccadive Sea	2	50.4	0	—	0.6× / 3.6
Incidents · Mozambique Channel	2	46.2	0	—	5.0× / 0.4
Nav aids · English Channel	2	45.6	1	57	0.6× / 3.6
Nav aids · Persian Gulfnew	2	39.8	1	129	new / 0
Derelicts · Bay of Bengal	2	37.5	1	105	0.6× / 3.6
Nav aids · Irish Sea and St. George's Channel	2	35.6	1	92	1.0× / 2
Incidents · Caribbean Sea	2	29.5	1	48	0.4× / 5
Cable ops · Gulf of Alaskanew	2	28.9	0	—	new / 0
Debris · Bay of Biscaynew	2	26.6	1	32	new / 0
Cable ops · Arabian Sea	2	25.3	0	—	10× / 0.2
Incidents · Arabian Sea	2	21.5	1	48	0.6× / 3.2
Other · South Pacific Ocean	2	18.5	2	11	3.3× / 0.6
Incidents · Bay of Bengal	2	16.8	1	29	1.3× / 1.6
Incidents · South Pacific Ocean	2	16.2	0	—	0.4× / 5
Missiles · Barentsz Sea	2	13.5	0	—	0.2× / 8.8
Exercises · Andaman or Burma Sea	2	11.2	0	—	0.8× / 2.4
Other · North Pacific Ocean	2	10.8	0	—	0.3× / 5.8
Other · South China Sea	2	8.1	1	7	3.3× / 0.6
Exercises · Indian Ocean	2	7.1	0	—	5.0× / 0.4
Quakes · Bismarck Sea	2	6	0	—	3.3× / 0.6
Debris · Arafura Sea	2	5.7	1	12	10× / 0.2
Exercises · Arctic Oceannew	2	5.6	0	—	new / 0
Derelicts · South Atlantic Ocean	2	5.5	1	15	1.4× / 1.4
Quakes · North Atlantic Ocean	2	4.4	1	4	1.3× / 1.6
Incidents · Bismarck Sea	2	3.6	0	—	1.1× / 1.8
Derelicts · Arafura Sea	2	3.2	0	—	10× / 0.2
Nav aids · Gulf of Mexicolong running	1	212.5	7	546	0.5× / 2.2
Surveys · The Northwestern Passages	1	157.1	6	45	1.0× / 1
Wrecks · Caribbean Sea	1	129.7	5	342	2.5× / 0.4
Wrecks · Arabian Sea	1	123.6	4	132	0.6× / 1.8
Surveys · Sea of Okhotsk	1	105.6	4	110	0.6× / 1.6
Nav aids · Bay of Biscay	1	77.4	3	63	new / 0
Other · Arabian Sealong running	1	74.4	2	386	5.0× / 0.2
Nav aids · Andaman or Burma Sealong running	1	71.5	3	634	1.7× / 0.6
Surveys · Gulf of Mexico	1	70	3	171	new / 0
Nav aids · Arabian Sea	1	60.5	2	338	0.6× / 1.6
Ordnance · North Sea	1	60	2	239	1.3× / 0.8
Wrecks · North Sea	1	60	2	293	2.5× / 0.4
Nav aids · Beaufort Sea	1	58.8	2	50	1.0× / 1
Nav aids · The Northwestern Passages	1	58.4	0	—	0.7× / 1.4
Nav aids · Laccadive Sea	1	57.5	2	108	1.7× / 0.6
Incidents · Mediterranean Sea - Western Basin	1	51.6	0	—	1.7× / 0.6
Spills · North Atlantic Ocean	1	45.6	1	71	0.3× / 3
Other · Persian Gulf	1	45.4	2	57	new / 0
Nav aids · Arafura Sea	1	34.8	1	86	1.3× / 0.8
Derelicts · Arabian Sea	1	33.3	1	43	1.0× / 1
Nav aids · Arctic Ocean	1	30	1	58	new / 0
Cable ops · North Sea	1	23.9	1	23	0.4× / 2.4
Other · English Channel	1	19.4	1	19	0.7× / 1.4
Volcanic · South Pacific Ocean	1	16.8	1	16	5.0× / 0.2
Surveys · English Channel	1	16.5	1	16	5.0× / 0.2
Cable ops · Java Sea	1	16.5	0	—	new / 0
Cable ops · Gulf of Suez	1	15.3	1	15	new / 0
Incidents · Laptev Sea	1	15.3	0	—	new / 0
Derelicts · Andaman or Burma Sea	1	14.6	0	—	new / 0
Spills · The Coastal Waters of Southeast Alaska and British Columbia	1	14	0	—	1.7× / 0.6
Exercises · Mediterranean Sea - Eastern Basin	1	13.7	0	—	0.1× / 17.2
Spills · Bering Sea	1	13	1	13	new / 0
Incidents · Solomon Sea	1	12.4	1	39	0.7× / 1.4
Cable ops · North Pacific Ocean	1	12.3	0	—	0.7× / 1.4
Derelicts · Mediterranean Sea - Eastern Basin	1	11.6	0	—	1.0× / 1
Cable ops · South Atlantic Ocean	1	10.3	0	—	0.6× / 1.6
Surveys · Celtic Sea	1	9.6	0	—	1.7× / 0.6
Missiles · Japan Sea	1	8.8	0	—	1.0× / 1
Missiles · Laptev Sea	1	8.3	0	—	0.8× / 1.2
Surveys · Philippine Sea	1	8.3	0	—	new / 0
Exercises · Philippine Sea	1	7.8	0	—	0.1× / 7
Derelicts · South China Sea	1	7.6	1	7	1.7× / 0.6
Cable ops · Indian Ocean	1	6.5	1	6	1.0× / 1
Missiles · Davis Strait	1	5.5	0	—	new / 0
Exercises · Adriatic Sea	1	5.2	0	—	2.5× / 0.4
Missiles · Indian Ocean	1	5.2	0	—	0.3× / 3.6
Nav aids · Great Australian Bight	1	4.9	0	—	1.0× / 1
Incidents · Ionian Sea	1	4.6	1	4	2.5× / 0.4
Nav aids · Bristol Channel	1	4.5	0	—	2.5× / 0.4
Other · Bismarck Sea	1	3.4	0	—	5.0× / 0.2
Incidents · Gulf of Thailand	1	3.3	1	3	1.3× / 0.8
Incidents · Andaman or Burma Sea	1	3	0	—	5.0× / 0.2
Other · Arafura Sea	1	3	0	—	5.0× / 0.2
Icebergs · Arctic Ocean	1	3	0	—	new / 0
Icebergs · Barentsz Sea	1	3	0	—	2.5× / 0.4
Quakes · Bering Sea	1	3	0	—	new / 0
Debris · Caribbean Sea	1	3	0	—	1.7× / 0.6
Quakes · Coral Sea	1	3	0	—	0.6× / 1.6
Quakes · Eastern China Sea	1	3	0	—	new / 0
Quakes · Ionian Sea	1	3	0	—	new / 0
Derelicts · North Atlantic Ocean	1	3	0	—	0.3× / 3.8
Derelicts · Mozambique Channel	1	2.9	0	—	1.0× / 1
Other · Hudson Bay	1	2.6	0	—	1.7× / 0.6
Exercises · Coral Sea	1	2.1	0	—	1.7× / 0.6
Surveys · South China Sea	1	1.9	1	1	0.4× / 2.6
Quakes · Southern Ocean	1	1.9	1	1	5.0× / 0.2
Surveys · Bay of Bengal	1	1.6	1	87	0.3× / 3.4
Containers · North Atlantic Ocean	1	1.6	1	1	2.5× / 0.4
Missiles · Coral Sea	1	0.8	0	—	new / 0
Missiles · Philippine Sea	1	0.6	0	—	5.0× / 0.2
Icebergs · Laptev Sea	1	0.3	1	0	0.6× / 1.8
Derelicts · Philippine Sea	1	0.2	0	—	new / 0
Incidents · The Northwestern Passages	1	0.1	0	—	5.0× / 0.2
Surveys · Kara Sea	0	210	7	81	0.0× / 2
Volcanic · Philippine Sealong running	0	180	6	651	0.0× / 0.4
Wrecks · South China Sealong running	0	120	4	1,303	0.0× / 1
Exercises · Aegean Sea	0	90	3	270	0.0× / 9.4
Wrecks · Persian Gulflong running	0	90	3	576	— / 0
Nav aids · Celtic Sea	0	89	2	44	0.0× / 1.6
Other · Black Sea	0	65.5	2	59	0.0× / 0.4
Mines · Black Sea	0	60	2	218	— / 0
Other · Caribbean Sea	0	60	2	337	0.0× / 0.2
Nav aids · Gulf of Californialong running	0	60	2	591	0.0× / 0.2
Exercises · Ionian Sea	0	60	2	270	— / 0
Derelicts · Laccadive Sea	0	60	2	100	0.0× / 0.6
Wrecks · North Atlantic Oceanlong running	0	60	2	492	0.0× / 0.4
Cable ops · Persian Gulflong running	0	60	2	414	0.0× / 0.6
Structures · South Atlantic Ocean	0	60	2	63	0.0× / 1
Surveys · Norwegian Sea	0	52	0	—	0.0× / 1.2
Wrecks · Coral Sea	0	31.6	1	91	— / 0
Missiles · Aegean Sea	0	30	1	270	— / 0
Wrecks · Bay of Bengal	0	30	1	37	— / 0
Exercises · Black Sea	0	30	1	191	0.0× / 16.6
Surveys · Black Sea	0	30	1	83	0.0× / 2
War risk · Black Sea	0	30	1	192	— / 0
Other · Coral Sea	0	30	1	163	0.0× / 0.6
Wrecks · Gulf of Mexico	0	30	1	201	— / 0
Surveys · Hudson Baylong running	0	30	1	408	0.0× / 0.2
Restricted · Indian Ocean	0	30	1	105	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2022-09, 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.