Sea Ledger, December 2022

2022-12-01 to 2022-12-31 · archive

issued: 701
warning-days in force: 13,463
in force at month end: 436
sea × type cells: 224

baseline: same month, previous 5 years (2021-12, 2020-12, 2019-12, 2018-12, 2017-12)

By type

type	issued	warning-days	in force at end
Incidents	142	1,372.7	62
Exercises	134	1,089.5	21
Icebergs	92	101.5	4
Surveys	69	2,862.2	91
Missiles	59	378.1	9
Nav aids	50	4,025.5	129
Cable ops	35	647.7	20
Quakes	31	99.4	0
Derelicts	30	228.4	11
Other	24	639.6	20
Wrecks	8	1,293.8	46
Spills	8	154.6	4
Towing	6	6.4	0
Piracy	4	16	0
Debris	3	69.2	3
Restricted	2	38.2	1
Containers	2	4.3	1
Ordnance	2	63.5	2
Volcanic	0	217	7
Mines	0	62	2
Structures	0	62	2
War risk	0	31	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Incidents · North Atlantic Oceansurge	35	494.8	25	323	3.5× / 10
Icebergs · Southern Ocean	33	33.6	1	31	1.1× / 29.6
Icebergs · Labrador Sea	32	36.4	2	32	1.0× / 31.2
Incidents · South China Sea	27	132.2	7	302	0.7× / 38.2
Missiles · North Atlantic Oceansurge	25	108.2	4	31	3.4× / 7.4
Icebergs · South Atlantic Ocean	25	25.5	1	27	1.0× / 25.4
Exercises · North Pacific Ocean	24	256.4	5	65	1.5× / 16
Surveys · South Atlantic Ocean	21	387.3	10	117	1.4× / 15.2
Surveys · Arabian Seasurge	18	350.8	14	86	3.5× / 5.2
Exercises · Celtic Seanew	15	22.1	0	—	new / 0
Surveys · Bay of Bengalsurge	12	233.7	8	66	4.0× / 3
Incidents · North Pacific Ocean	12	151.7	2	56	0.8× / 15.2
Exercises · Bay of Bengal	12	103.2	0	—	0.9× / 13
Exercises · Arabian Sea	12	72.4	3	32	0.9× / 13.2
Missiles · South Pacific Oceansurge	12	51.4	0	—	2.0× / 6
Exercises · North Atlantic Oceansurge	10	117.9	4	127	2.1× / 4.8
Cable ops · Arabian Seasurge	10	81.9	3	29	13× / 0.8
Quakes · South Pacific Ocean	10	30	0	—	0.9× / 11.4
Exercises · South Pacific Ocean	10	29.3	0	—	1.3× / 8
Nav aids · South Atlantic Oceansurge	9	864.8	28	191	2.4× / 3.8
Exercises · Laccadive Seasurge	9	79.2	1	32	4.1× / 2.2
Incidents · Indian Oceansurge	9	38.8	4	56	2.3× / 4
Derelicts · Gulf of Mexiconew	9	14.6	0	—	new / 0
Nav aids · North Sea	8	171.4	6	205	0.8× / 9.6
Other · North Atlantic Oceansurge	7	90.3	5	103	3.2× / 2.2
Exercises · Gulf of Mexicosurge	7	34.8	0	—	35× / 0.2
Incidents · South Atlantic Ocean	6	100.7	2	60	0.8× / 7.4
Exercises · South Atlantic Ocean	6	57.6	1	184	0.7× / 8.4
Missiles · Indian Oceansurge	6	53.5	1	42	2.1× / 2.8
Cable ops · Philippine Seasurge	6	28.3	2	30	4.3× / 1.4
Quakes · Philippine Seasurge	6	18	0	—	2.5× / 2.4
Towing · North Pacific Oceansurge	6	6.4	0	—	2.0× / 3
Nav aids · South Pacific Oceanlong running	5	506.5	17	529	1.5× / 3.4
Nav aids · North Atlantic Oceanlong running	5	209.1	5	625	0.8× / 6.6
Spills · Gulf of Mexico	5	77	2	41	1.6× / 3.2
Missiles · North Pacific Oceanlong running	5	58.2	2	564	1.3× / 3.8
Incidents · Bay of Bengalsurge	5	43.4	1	33	5.0× / 1
Derelicts · South Pacific Ocean	5	41.1	4	89	1.4× / 3.6
Incidents · Java Seasurge	5	28.9	2	34	2.5× / 2
Derelicts · Caribbean Seasurge	5	16.2	0	—	5.0× / 1
Derelicts · North Atlantic Ocean	5	14.1	1	47	0.8× / 6.6
Incidents · Coral Sea	5	2.2	0	—	1.3× / 4
Surveys · Persian Gulflong running	4	261.1	9	712	0.8× / 4.8
Other · South Atlantic Oceansurge	4	34.1	1	118	20× / 0.2
Incidents · Caribbean Sea	4	31.9	2	29	1.3× / 3
Cable ops · Caribbean Seasurge	4	31.4	0	—	20× / 0.2
Incidents · South Pacific Ocean	4	22.4	1	37	0.7× / 5.8
Missiles · Great Australian Bightnew	4	17.6	0	—	new / 0
Exercises · Andaman or Burma Seasurge	4	14.1	1	31	3.3× / 1.2
Quakes · North Pacific Ocean	4	12	0	—	0.5× / 8.8
Exercises · Indian Ocean	4	9.2	0	—	1.8× / 2.2
Exercises · Bay of Biscaysurge	4	9	0	—	20× / 0.2
Cable ops · Gulf of St. Lawrencenew	4	5.5	1	24	new / 0
Incidents · Great Australian Bightsurge	4	0.3	1	23	3.3× / 1.2
Nav aids · Caribbean Sealong running	3	763.3	25	683	0.9× / 3.4
Surveys · North Atlantic Oceanlong running	3	686.7	22	368	0.3× / 10.6
Other · Coral Seasurge	3	88	3	255	7.5× / 0.4
Incidents · Gulf of Mexico	3	65.2	0	—	1.9× / 1.6
Surveys · Caribbean Seasurge	3	64.3	2	62	3.8× / 0.8
Exercises · Black Sea	3	51.8	2	283	0.2× / 13.2
Spills · North Pacific Ocean	3	39	1	21	1.0× / 3
Incidents · Laccadive Sea	3	35.8	3	38	0.9× / 3.4
Cable ops · South Pacific Oceansurge	3	35.3	2	25	7.5× / 0.4
Incidents · Arabian Sea	3	26.6	2	44	0.7× / 4.2
Exercises · Gulf of Californianew	3	13.4	0	—	new / 0
Quakes · Indian Ocean	3	9	0	—	1.5× / 2
Quakes · Southern Oceansurge	3	9	0	—	3.8× / 0.8
Incidents · Tasman Sea	3	7.2	1	7	1.7× / 1.8
Nav aids · North Pacific Oceanlong running	2	408.3	13	638	0.5× / 4
Wrecks · South Atlantic Ocean	2	162	6	218	3.3× / 0.6
Surveys · Indian Oceanlong running	2	107.1	4	683	0.8× / 2.6
Nav aids · Celtic Sea	2	95.5	4	134	1.0× / 2
Other · Arabian Sealong running	2	78.1	3	478	10× / 0.2
Other · Gulf of Mexico	2	54.9	0	—	5.0× / 0.4
Cable ops · Indian Ocean	2	50.9	1	32	10× / 0.2
Surveys · Gulf of Mexico	2	50.4	2	136	3.3× / 0.6
Incidents · Philippine Sea	2	43.9	0	—	1.3× / 1.6
Derelicts · Arabian Sea	2	42.7	2	135	0.8× / 2.4
Derelicts · Bay of Bengal	2	34.1	1	197	1.4× / 1.4
Other · South Pacific Ocean	2	32	1	53	5.0× / 0.4
Incidents · Gulf of Thailand	2	31.7	2	43	0.9× / 2.2
Surveys · North Pacific Ocean	2	31.7	0	—	5.0× / 0.4
Incidents · Mediterranean Sea - Eastern Basin	2	24.7	2	68	0.2× / 9.6
Cable ops · Eastern China Sea	2	10.5	0	—	1.7× / 1.2
Exercises · Caribbean Sea	2	7.1	0	—	5.0× / 0.4
Incidents · Arafura Sea	2	6	0	—	2.5× / 0.8
Piracy · Gulf of Guinea	2	6	0	—	0.3× / 5.8
Other · Indian Ocean	2	6	0	—	10× / 0.2
Quakes · South Atlantic Ocean	2	6	0	—	0.9× / 2.2
Icebergs · South Pacific Oceannew	2	6	0	—	new / 0
Missiles · South China Sea	2	5	0	—	3.3× / 0.6
Exercises · Philippine Sea	2	4.9	0	—	0.7× / 3
Nav aids · Gulf of Guineanew	2	3.5	0	—	new / 0
Exercises · Mozambique Channel	2	3.1	0	—	10× / 0.2
Containers · Celtic Sea	2	2.7	1	2	1.7× / 1.2
Nav aids · English Channel	2	2.4	0	—	0.8× / 2.4
Nav aids · Davis Strait	2	0.6	0	—	2.5× / 0.8
Nav aids · Gulf of Mexicolong running	1	221.4	7	638	0.6× / 1.6
Wrecks · Persian Gulflong running	1	127.3	5	668	1.0× / 1
Nav aids · Arabian Sealong running	1	94	4	430	0.8× / 1.2
Nav aids · Persian Gulf	1	88.7	2	221	1.7× / 0.6
Surveys · Laccadive Sea	1	69.6	2	322	1.7× / 0.6
Other · Persian Gulf	1	68.3	2	149	5.0× / 0.2
Cable ops · North Atlantic Ocean	1	68	0	—	0.3× / 3.2
Nav aids · Laccadive Sea	1	64.9	2	200	2.5× / 0.4
Wrecks · North Atlantic Oceanlong running	1	63.1	3	584	5.0× / 0.2
Ordnance · North Sea	1	62	2	331	1.3× / 0.8
Cable ops · Mediterranean Sea - Western Basin	1	48.9	1	45	1.3× / 0.8
Wrecks · Laccadive Sealong running	1	46.8	1	451	2.5× / 0.4
Wrecks · North Pacific Ocean	1	39.3	2	152	2.5× / 0.4
Nav aids · Indian Ocean	1	33.7	1	50	0.8× / 1.2
Cable ops · South China Sea	1	31	1	39	new / 0
Surveys · Black Sea	1	25.3	1	25	0.6× / 1.6
Missiles · South Atlantic Ocean	1	22.8	1	22	0.6× / 1.8
Missiles · Arctic Ocean	1	21.3	0	—	1.0× / 1
Incidents · Mozambique Channel	1	17.7	1	42	1.7× / 0.6
Incidents · English Channel	1	17.6	1	17	new / 0
Incidents · Hudson Bay	1	12	1	12	new / 0
Exercises · Japan Sea	1	9.4	0	—	0.8× / 1.2
Wrecks · Southern Ocean	1	9.3	1	9	5.0× / 0.2
Incidents · Mediterranean Sea - Western Basin	1	8.8	1	54	5.0× / 0.2
Nav aids · Bering Sea	1	8.5	1	8	1.3× / 0.8
Nav aids · Labrador Sea	1	7.4	0	—	2.5× / 0.4
Piracy · Red Sea	1	7	0	—	5.0× / 0.2
Exercises · Adriatic Sea	1	6.5	0	—	new / 0
Wrecks · Flores Sea	1	5.6	1	5	new / 0
Other · Bering Sea	1	5.4	0	—	2.5× / 0.4
Exercises · Mediterranean Sea - Eastern Basin	1	5.2	0	—	0.1× / 17
Incidents · Sulu Sea	1	5.2	1	5	new / 0
Exercises · Coral Sea	1	4.8	0	—	2.5× / 0.4
Nav aids · Gulf of Alaska	1	4.4	0	—	1.3× / 0.8
Missiles · Southern Ocean	1	4.1	0	—	1.3× / 0.8
Restricted · North Sea	1	3.6	0	—	5.0× / 0.2
Restricted · Norwegian Sea	1	3.6	0	—	new / 0
Exercises · Red Sea	1	3.3	1	3	1.3× / 0.8
Missiles · Philippine Sea	1	3.1	0	—	1.3× / 0.8
Quakes · Bering Sea	1	3	0	—	5.0× / 0.2
Quakes · Coral Sea	1	3	0	—	1.0× / 1
Debris · North Pacific Ocean	1	3	0	—	1.7× / 0.6
Quakes · Red Sea	1	3	0	—	new / 0
Debris · South Atlantic Ocean	1	3	0	—	0.7× / 1.4
Piracy · South Pacific Ocean	1	3	0	—	5.0× / 0.2
Incidents · Bismarck Sea	1	2.2	0	—	0.4× / 2.4
Nav aids · Coral Sea	1	1.9	0	—	0.3× / 4
Missiles · Laccadive Sea	1	1.9	0	—	1.3× / 0.8
Ordnance · North Pacific Ocean	1	1.5	0	—	new / 0
Derelicts · Tasman Sea	1	1.5	1	1	new / 0
Debris · North Atlantic Ocean	1	1.2	1	1	0.2× / 4.6
Cable ops · Malacca Strait	1	1	1	0	new / 0
Nav aids · Gulf of St. Lawrence	1	0.7	0	—	new / 0
Derelicts · South China Sea	1	0.6	0	—	0.3× / 3.4
Wrecks · The Northwestern Passageslong running	0	217	7	485	— / 0
Volcanic · Philippine Sealong running	0	186	6	743	0.0× / 0.8
Wrecks · Arabian Sea	0	155	5	224	0.0× / 1
Wrecks · Caribbean Sealong running	0	155	5	434	0.0× / 0.2
Surveys · The Northwestern Passages	0	155	5	134	— / 0
Surveys · Kara Sea	0	124	4	173	— / 0
Cable ops · Persian Gulflong running	0	124	4	506	— / 0
Wrecks · South China Sealong running	0	94.7	3	1,395	0.0× / 1
Nav aids · Bay of Biscay	0	93	3	155	0.0× / 0.2
Exercises · Aegean Sea	0	92.6	2	362	0.0× / 12.2
Derelicts · Laccadive Sea	0	63.5	2	192	0.0× / 2.2
Nav aids · Andaman or Burma Sea	0	62	2	289	— / 0
Surveys · Barentsz Sea	0	62	2	173	0.0× / 0.6
Mines · Black Sea	0	62	2	310	— / 0
Other · Caribbean Sealong running	0	62	2	429	0.0× / 0.2
Nav aids · Gulf of Californialong running	0	62	2	683	— / 0
Wrecks · Hudson Bay	0	62	2	64	— / 0
Wrecks · North Sealong running	0	62	2	385	0.0× / 0.6
Structures · South Atlantic Ocean	0	62	2	155	0.0× / 1
Exercises · Ionian Sea	0	61.5	1	362	0.0× / 1.8
Surveys · Andaman or Burma Sea	0	56	0	—	0.0× / 0.8
Nav aids · Irish Sea and St. George's Channel	0	33.7	1	184	0.0× / 1.4
Missiles · Aegean Sea	0	31	1	362	0.0× / 0.8
Nav aids · Arafura Sea	0	31	1	178	0.0× / 0.4
Nav aids · Arctic Ocean	0	31	1	101	— / 0
Surveys · Arctic Ocean	0	31	1	111	— / 0
Nav aids · Barentsz Sea	0	31	1	49	— / 0
Cable ops · Bay of Bengal	0	31	1	40	— / 0
Wrecks · Bay of Bengal	0	31	1	129	— / 0
Debris · Bay of Biscay	0	31	1	115	0.0× / 0.2
Nav aids · Beaufort Sea	0	31	1	142	— / 0
Cable ops · Black Sea	0	31	1	60	0.0× / 0.2
Other · Black Sea	0	31	1	42	— / 0
War risk · Black Sea	0	31	1	284	— / 0
Cable ops · Ceram Sea	0	31	1	37	— / 0
Wrecks · Coral Sea	0	31	1	183	— / 0
Other · Great Australian Bight	0	31	1	76	0.0× / 0.8
Cable ops · Gulf of Boni	0	31	1	75	— / 0
Surveys · Gulf of Guinea	0	31	1	60	— / 0
Wrecks · Gulf of Mexico	0	31	1	293	— / 0
Nav aids · Hudson Bay	0	31	1	108	— / 0
Surveys · Hudson Baylong running	0	31	1	500	— / 0
Restricted · Indian Ocean	0	31	1	197	— / 0
Debris · Inner Seas off the West Coast of Scotland	0	31	1	280	— / 0
Surveys · Japan Sea	0	31	1	153	— / 0
Surveys · Malacca Strait	0	31	1	63	0.0× / 0.2
Nav aids · Mediterranean Sea - Eastern Basinlong running	0	31	1	577	0.0× / 0.2
Spills · North Atlantic Ocean	0	31	1	163	0.0× / 1.8
Surveys · Sea of Okhotsk	0	31	1	202	0.0× / 0.2

Cite: seahazards.com Sea Ledger, 2022-12, 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.