Sea Ledger, July 2013

2013-07-01 to 2013-07-31 · archive

issued: 574
warning-days in force: 8,739
in force at month end: 300
sea × type cells: 217

baseline: same month, previous 5 years (2012-07, 2011-07, 2010-07, 2009-07, 2008-07)

By type

type	issued	warning-days	in force at end
Incidents	175	823.6	35
Exercises	86	783.1	27
Cable ops	74	1,217.1	42
Nav aids	53	2,385	81
Icebergs	36	48	3
Quakes	29	87.7	1
Derelicts	26	123.9	5
Surveys	25	1,212.1	41
Other	15	390.2	11
Missiles	15	168	6
Spills	10	158	5
Containers	8	21.9	1
Wrecks	7	702.7	20
Piracy	6	36.4	2
Debris	3	9	0
Ordnance	2	102.5	3
Towing	2	41.9	3
Restricted	1	217	7
Structures	1	86.4	3
Mines	0	31	1
War risk	0	62	2
Volcanic	0	31	1

By sea and type · 200 cells, most issued first

cell	issued	warning-days	at end	longest d	vs 5 y
Incidents · Indian Oceansurge	36	37.3	0	—	9.5× / 3.8
Cable ops · South Atlantic Ocean	32	101.9	4	33	1.4× / 23.4
Incidents · North Pacific Oceansurge	28	44.9	2	34	2.2× / 12.6
Incidents · Mediterranean Sea - Eastern Basinsurge	23	94.4	5	29	19× / 1.2
Icebergs · Davis Straitsurge	22	22.9	2	25	5.0× / 4.4
Incidents · South China Seasurge	21	101.5	5	30	3.8× / 5.6
Exercises · North Pacific Ocean	18	73.9	4	35	1.6× / 11.2
Exercises · Yellow Seasurge	15	115	6	35	2.5× / 6
Incidents · North Atlantic Ocean	13	164	5	67	1.6× / 8.4
Derelicts · Indian Oceansurge	11	30.1	2	33	3.9× / 2.8
Nav aids · South Atlantic Oceansurgelong running	10	613.3	19	1,806	2.1× / 4.8
Exercises · Black Seasurge	9	46.6	2	21	4.5× / 2
Quakes · South Pacific Ocean	9	26.7	1	29	0.8× / 12
Icebergs · Labrador Seasurge	9	10.7	0	—	11× / 0.8
Surveys · South Atlantic Oceansurge	8	184.6	6	189	2.5× / 3.2
Exercises · Mediterranean Sea - Eastern Basinsurge	8	26.8	1	33	3.1× / 2.6
Nav aids · North Sealong running	7	385.2	12	390	0.9× / 7.8
Cable ops · North Seasurge	7	112.6	3	89	2.2× / 3.2
Exercises · South Atlantic Ocean	7	49.1	1	35	0.9× / 7.6
Incidents · South Pacific Ocean	7	17.8	2	30	1.3× / 5.6
Cable ops · Norwegian Seasurge	6	212.7	6	124	2.3× / 2.6
Cable ops · North Atlantic Ocean	6	108.6	4	149	1.2× / 5
Spills · Gulf of Mexico	6	68	3	23	1.1× / 5.6
Cable ops · Black Seasurge	6	66.5	3	55	15× / 0.4
Incidents · Davis Straitsurge	6	30.7	1	19	7.5× / 0.8
Missiles · North Atlantic Oceansurge	6	29.2	0	—	2.1× / 2.8
Incidents · Coral Sea	6	13.5	1	30	1.8× / 3.4
Nav aids · North Atlantic Ocean	5	224.5	7	305	1.0× / 4.8
Incidents · Bay of Bengalsurge	5	19.3	0	—	3.6× / 1.4
Other · Arafura Seanew	5	1.3	0	—	new / 0
Incidents · Caribbean Seasurge	4	123.8	2	63	2.9× / 1.4
Surveys · Black Seasurge	4	80.8	2	68	6.7× / 0.6
Cable ops · Barentsz Seasurge	4	67.7	2	40	10× / 0.4
Nav aids · Inner Seas off the West Coast of Scotland	4	59.2	2	110	1.5× / 2.6
Incidents · South Atlantic Ocean	4	30.7	2	22	0.7× / 6
Exercises · Coral Seasurge	4	23.4	1	25	4.0× / 1
Exercises · Baltic Seasurge	4	17.4	1	34	2.9× / 1.4
Derelicts · North Atlantic Oceansurge	4	16.8	1	32	2.0× / 2
Exercises · South Pacific Ocean	4	16.6	0	—	1.1× / 3.6
Incidents · Gulf of Mexicosurge	4	16.1	2	25	5.0× / 0.8
Containers · Arabian Seanew	4	12.3	0	—	new / 0
Quakes · Indian Oceansurge	4	12	0	—	2.9× / 1.4
Quakes · North Pacific Ocean	4	12	0	—	0.5× / 8.4
Icebergs · South Atlantic Ocean	4	11.4	1	22	1.1× / 3.6
Containers · Laccadive Seanew	4	9.6	1	10	new / 0
Cable ops · South China Sea	3	189.8	7	182	0.8× / 3.6
Nav aids · North Pacific Ocean	3	79.6	3	237	1.3× / 2.4
Nav aids · English Channellong running	3	74.7	4	482	1.9× / 1.6
Missiles · North Pacific Ocean	3	62.7	3	59	0.5× / 6.4
Surveys · Mediterranean Sea - Eastern Basin	3	62.6	2	63	1.9× / 1.6
Nav aids · The Northwestern Passagessurge	3	46.5	3	15	5.0× / 0.6
Spills · North Atlantic Ocean	3	37	1	39	1.5× / 2
Piracy · Gulf of Guineanew	3	16.1	0	—	new / 0
Quakes · Solomon Sea	3	9	0	—	1.5× / 2
Quakes · Tasman Seasurge	3	9	0	—	3.8× / 0.8
Nav aids · Gulf of Mexicolong running	2	138.6	5	631	0.7× / 3
Other · North Sea	2	93	3	322	3.3× / 0.6
Wrecks · Arabian Seanew	2	89.5	2	219	new / 0
Surveys · Gulf of Mexico	2	86.9	4	119	5.0× / 0.4
Exercises · South China Sea	2	70.8	2	35	0.6× / 3.6
Exercises · Laccadive Sea	2	61.8	2	153	0.7× / 3
Exercises · Philippine Sea	2	56.1	1	35	0.7× / 3
Exercises · Bay of Bengal	2	54.6	1	37	0.4× / 4.8
Cable ops · Sea of Okhotsk	2	44.4	3	56	2.0× / 1
Incidents · Tyrrhenian Sealong running	2	43.2	1	563	1.4× / 1.4
Nav aids · Persian Gulf	2	39.4	2	33	10× / 0.2
Exercises · Arabian Sea	2	39	1	37	0.7× / 2.8
Nav aids · Bass Strait	2	32.9	1	121	10× / 0.2
Other · Gulf of Mexiconew	2	32.6	1	82	new / 0
Incidents · Arafura Sea	2	24	1	23	3.3× / 0.6
Surveys · North Pacific Ocean	2	23.7	2	362	3.3× / 0.6
Cable ops · Kara Sea	2	20	2	14	10× / 0.2
Missiles · Japan Sea	2	16.4	1	21	10× / 0.2
Cable ops · Celtic Sea	2	14.8	1	28	1.3× / 1.6
Incidents · Laccadive Sea	2	14.3	2	8	10× / 0.2
Incidents · Arabian Sea	2	13.4	0	—	2.0× / 1
Piracy · South China Sea	2	11.5	2	5	2.5× / 0.8
Exercises · Andaman or Burma Sea	2	10.2	0	—	3.3× / 0.6
Nav aids · Singapore Straitnew	2	9.6	1	8	new / 0
Missiles · South Pacific Ocean	2	9.6	1	41	3.3× / 0.6
Nav aids · The Coastal Waters of Southeast Alaska and British Columbia	2	6.6	0	—	1.1× / 1.8
Derelicts · Caribbean Seanew	2	6	0	—	new / 0
Quakes · Coral Sea	2	6	0	—	1.3× / 1.6
Derelicts · North Pacific Ocean	2	6	0	—	0.7× / 2.8
Quakes · Southern Ocean	2	6	0	—	3.3× / 0.6
Exercises · Eastern China Sea	2	2.4	0	—	5.0× / 0.4
Nav aids · Timor Sea	2	0.6	0	—	2.5× / 0.8
Structures · North Sealong running	1	86.4	3	716	5.0× / 0.2
Exercises · Aegean Sea	1	76.4	3	210	new / 0
Nav aids · Caribbean Sea	1	71.4	3	250	5.0× / 0.2
Nav aids · Indian Ocean	1	57	2	41	1.7× / 0.6
Other · South China Sea	1	41.9	1	37	5.0× / 0.2
Wrecks · Indian Ocean	1	36	1	224	new / 0
Nav aids · Bay of Bengal	1	35.3	0	—	5.0× / 0.2
Surveys · Bering Sealong running	1	31	1	366	2.5× / 0.4
Restricted · English Channel	1	31	1	69	new / 0
Wrecks · Inner Seas off the West Coast of Scotland	1	28.7	1	28	2.5× / 0.4
Cable ops · Mediterranean Sea - Eastern Basin	1	17.9	0	—	0.6× / 1.8
Incidents · Japan Sea	1	17.3	1	17	new / 0
Surveys · Gulf of Suez	1	17.1	1	41	new / 0
Spills · Gulf of Alaska	1	14	0	—	2.5× / 0.4
Derelicts · Mediterranean Sea - Eastern Basin	1	8.8	0	—	5.0× / 0.2
Piracy · Red Sea	1	8.8	0	—	0.5× / 2
Towing · Bay of Bengal	1	8.6	1	8	new / 0
Derelicts · Gulf of Mexico	1	7.1	1	7	2.5× / 0.4
Cable ops · Caribbean Sea	1	7	0	—	new / 0
Ordnance · Baltic Sea	1	6.1	0	—	new / 0
Cable ops · Irish Sea and St. George's Channel	1	5.8	0	—	new / 0
Missiles · Philippine Sea	1	5.5	0	—	new / 0
Incidents · Tasman Sea	1	5.4	0	—	0.8× / 1.2
Missiles · Laccadive Sea	1	5	0	—	1.7× / 0.6
Incidents · Bay of Biscay	1	4.7	0	—	1.0× / 1
Exercises · Caribbean Sea	1	4.6	0	—	5.0× / 0.2
Surveys · Irish Sea and St. George's Channel	1	4.3	1	4	2.5× / 0.4
Other · Arabian Sea	1	4.1	0	—	5.0× / 0.2
Surveys · Sea of Azov	1	4	0	—	new / 0
Ordnance · Persian Gulf	1	3.4	0	—	new / 0
Derelicts · Arabian Sea	1	3	0	—	2.5× / 0.4
Derelicts · Bay of Bengal	1	3	0	—	2.5× / 0.4
Debris · Celtic Sea	1	3	0	—	5.0× / 0.2
Cable ops · Indian Ocean	1	3	0	—	1.3× / 0.8
Debris · Indian Ocean	1	3	0	—	1.0× / 1
Icebergs · Indian Ocean	1	3	0	—	new / 0
Derelicts · Ionian Sea	1	3	0	—	new / 0
Derelicts · Japan Sea	1	3	0	—	new / 0
Debris · Laccadive Sea	1	3	0	—	new / 0
Quakes · Red Sea	1	3	0	—	new / 0
Quakes · South Atlantic Ocean	1	3	0	—	0.8× / 1.2
Incidents · Yellow Sea	1	3	1	3	new / 0
Incidents · Ionian Sea	1	2.5	1	2	new / 0
Surveys · Persian Gulf	1	2.5	0	—	new / 0
Towing · Baltic Sea	1	2.3	1	2	new / 0
Nav aids · Alboran Sea	1	2	1	2	new / 0
Exercises · Bering Sea	1	2	0	—	1.0× / 1
Surveys · The Coastal Waters of Southeast Alaska and British Columbia	1	1.6	0	—	new / 0
Wrecks · Bay of Bengal	1	1.5	1	1	new / 0
Wrecks · Bering Sea	1	1.5	0	—	new / 0
Other · Bering Sea	1	1.4	0	—	5.0× / 0.2
Incidents · Philippine Sea	1	0.8	0	—	0.5× / 2
Other · Ionian Sea	1	0.7	0	—	new / 0
Other · Irish Sea and St. George's Channel	1	0.7	0	—	new / 0
Derelicts · Andaman or Burma Sea	1	0.5	0	—	new / 0
Incidents · Great Australian Bight	1	0.4	0	—	5.0× / 0.2
Other · Indian Ocean	1	0.3	0	—	2.5× / 0.4
Incidents · Bismarck Sea	1	0.2	0	—	0.7× / 1.4
Wrecks · Bristol Channel	1	0.2	0	—	new / 0
Nav aids · Coral Sea	1	0.2	0	—	0.4× / 2.4
Incidents · Java Sea	1	0.2	1	0	5.0× / 0.2
Incidents · Timor Sea	1	0.2	0	—	2.5× / 0.4
Nav aids · Great Australian Bight	1	0	0	—	5.0× / 0.2
Surveys · Arctic Oceanlong running	0	248	8	1,010	0.0× / 1.4
Surveys · Beaufort Sealong running	0	186	6	1,085	0.0× / 3.2
Wrecks · South Atlantic Oceanlong running	0	124	4	1,176	— / 0
Cable ops · Gulf of Mexico	0	94	3	116	0.0× / 0.6
Nav aids · Arabian Sealong running	0	93	3	782	0.0× / 0.2
Wrecks · Persian Gulf	0	93	3	330	0.0× / 0.4
Surveys · Arabian Sea	0	62	2	209	— / 0
Restricted · Black Sea	0	62	2	247	— / 0
Nav aids · Gulf of California	0	62	2	77	— / 0
Nav aids · Kara Sealong running	0	62	2	693	— / 0
War risk · Mediterranean Sea - Eastern Basinlong running	0	62	2	798	— / 0
Other · North Pacific Oceanlong running	0	62	2	471	0.0× / 1.6
Restricted · North Sealong running	0	62	2	709	0.0× / 0.8
Nav aids · Sea of Okhotsklong running	0	62	2	589	0.0× / 0.2
Other · South Atlantic Ocean	0	62	2	55	0.0× / 0.8
Nav aids · South China Sealong running	0	62	2	716	— / 0
Surveys · The Northwestern Passages	0	62	2	359	0.0× / 0.6
Wrecks · The Northwestern Passageslong running	0	58	1	1,060	0.0× / 0.6
Cable ops · Mozambique Channel	0	57.4	1	163	0.0× / 0.2
Surveys · North Atlantic Ocean	0	54	1	36	0.0× / 3
Missiles · Aegean Sea	0	31	1	210	— / 0
Nav aids · Andaman or Burma Sea	0	31	1	181	— / 0
Cable ops · Arafura Sea	0	31	1	63	0.0× / 0.2
Wrecks · Baltic Sea	0	31	1	65	— / 0
Towing · Barentsz Sea	0	31	1	46	— / 0
Mines · Black Sea	0	31	1	33	— / 0
Ordnance · Black Sea	0	31	1	33	0.0× / 0.2
Nav aids · Celtic Sea	0	31	1	279	0.0× / 2.2
Surveys · Chukchi Sea	0	31	1	240	0.0× / 0.2
Wrecks · Coral Sea	0	31	1	128	0.0× / 0.2
Nav aids · Eastern China Sealong running	0	31	1	533	— / 0
Cable ops · Gulf of Guinea	0	31	1	32	0.0× / 0.6
Wrecks · Gulf of Mexico	0	31	1	40	— / 0
Surveys · Indian Ocean	0	31	1	79	0.0× / 0.2
Ordnance · Inner Seas off the West Coast of Scotland	0	31	1	54	— / 0
Exercises · Ionian Sea	0	31	1	210	— / 0
Nav aids · Irish Sea and St. George's Channel	0	31	1	49	0.0× / 2.8
Nav aids · Laccadive Sea	0	31	1	96	— / 0
Surveys · Mediterranean Sea - Western Basin	0	31	1	82	0.0× / 1
Other · North Atlantic Ocean	0	31	1	345	0.0× / 0.4
Restricted · North Atlantic Ocean	0	31	1	60	— / 0
Wrecks · North Atlantic Oceanlong running	0	31	1	662	0.0× / 0.4
Ordnance · North Sealong running	0	31	1	616	0.0× / 0.2
Wrecks · North Sea	0	31	1	142	0.0× / 0.4
Other · Persian Gulf	0	31	1	52	0.0× / 0.6
Volcanic · Philippine Sealong running	0	31	1	458	0.0× / 0.2
Restricted · Sea of Okhotsklong running	0	31	1	657	— / 0
Spills · South Atlantic Oceanlong running	0	31	1	628	— / 0
Wrecks · South China Sea	0	31	1	90	0.0× / 0.4
Derelicts · South Pacific Oceanlong running	0	31	1	399	0.0× / 1

Cite: seahazards.com Sea Ledger, 2013-07, 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.