Cable ops · South Atlantic Ocean 53 229.3 10 64 1.7× / 30.4 Icebergs · Labrador Sea new 32 33.2 2 31 new / 0 Incidents · North Pacific Ocean 27 113.3 1 37 1.4× / 18.6 Incidents · North Atlantic Ocean 25 286.8 12 59 1.8× / 14 Nav aids · North Sea long running 19 313.5 13 426 1.2× / 15.4 Incidents · South China Sea 18 220.7 7 50 2.0× / 9.2 Exercises · Yellow Sea surge 16 124.9 3 38 2.9× / 5.6 Debris · Celtic Sea new 14 16.4 0 — new / 0 Incidents · South Atlantic Ocean surge 12 40.1 2 66 2.1× / 5.8 Exercises · Black Sea surge 11 128.7 6 24 28× / 0.4 Exercises · North Pacific Ocean 11 67.6 2 35 1.2× / 9 Exercises · South Atlantic Ocean 10 49 2 34 1.5× / 6.6 Incidents · Mozambique Channel surge 9 70.7 5 29 45× / 0.2 Nav aids · South Atlantic Ocean long running 8 436.5 15 1,045 0.9× / 9 Nav aids · Indian Ocean surge 8 100.4 3 225 3.1× / 2.6 Quakes · South Pacific Ocean 8 24 0 — 0.7× / 11 Incidents · Bay of Bengal surge 7 70 0 — 5.0× / 1.4 Exercises · Arabian Sea 7 56.4 1 31 1.2× / 6 Derelicts · North Atlantic Ocean surge 7 15.5 1 33 3.9× / 1.8 Incidents · Coral Sea surge 7 1.8 0 — 2.3× / 3 Cable ops · Gulf of Mexico surge 6 145.1 6 78 7.5× / 0.8 Nav aids · English Channel surge long running 6 105.5 3 666 2.3× / 2.6 Missiles · North Atlantic Ocean surge 6 23.3 0 — 15× / 0.4 Quakes · North Pacific Ocean 6 18 0 — 1.4× / 4.4 Surveys · Southern Ocean new 6 4.6 1 4 new / 0 Incidents · Laccadive Sea surge 5 145.9 3 36 5.0× / 1 Exercises · Aegean Sea long running 5 90.4 4 394 1.8× / 2.8 Cable ops · North Sea surge 5 90.3 4 68 6.3× / 0.8 Exercises · Bay of Bengal 5 60.4 2 35 0.6× / 8 Incidents · Gulf of Mexico surge 5 47.2 4 25 2.3× / 2.2 Derelicts · South Pacific Ocean surge long running 5 43.7 1 583 3.1× / 1.6 Containers · North Atlantic Ocean surge 5 12.5 0 — 5.0× / 1 Surveys · South Atlantic Ocean long running 4 186 6 373 1.3× / 3 Incidents · Indian Ocean 4 24.4 1 36 0.6× / 7 Debris · Indian Ocean new 4 8 0 — new / 0 Cable ops · Bristol Channel new 4 6.1 0 — new / 0 Incidents · Bismarck Sea surge 4 5.2 0 — 2.2× / 1.8 Nav aids · North Atlantic Ocean 3 194.4 7 303 0.7× / 4.2 Restricted · Black Sea new 3 83.3 4 240 new / 0 Incidents · South Pacific Ocean 3 46.3 1 41 0.4× / 7.2 Incidents · Java Sea surge 3 13.8 2 8 15× / 0.2 Derelicts · North Pacific Ocean surge 3 12.5 0 — 3.0× / 1 Exercises · South Pacific Ocean 3 9.8 0 — 1.4× / 2.2 Derelicts · Indian Ocean 3 6 0 — 0.8× / 3.8 Nav aids · Gulf of Mexico long running 2 171.9 6 815 0.7× / 2.8 Cable ops · Gulf of Guinea 2 112 2 67 1.7× / 1.2 Exercises · Ionian Sea 2 59.8 2 29 10× / 0.2 Other · North Atlantic Ocean 2 52.4 1 81 2.5× / 0.8 Cable ops · Mediterranean Sea - Eastern Basin 2 49.8 1 37 0.9× / 2.2 Surveys · Coral Sea new 2 48.1 3 100 new / 0 Incidents · Caribbean Sea 2 46.9 2 50 0.7× / 3 Cable ops · Andaman or Burma Sea 2 44.6 3 40 10× / 0.2 Spills · Gulf of Mexico 2 30 1 40 0.4× / 4.6 Spills · North Atlantic Ocean 2 30 0 — 1.0× / 2 Other · Black Sea new 2 25.5 0 — new / 0 Cable ops · Tasman Sea 2 17.6 1 24 1.3× / 1.6 Incidents · Arabian Sea 2 17.3 1 29 1.4× / 1.4 Incidents · Mediterranean Sea - Eastern Basin 2 7.3 0 — 2.0× / 1 Debris · North Atlantic Ocean 2 7.2 0 — 1.7× / 1.2 Exercises · Andaman or Burma Sea 2 7.1 0 — 5.0× / 0.4 Quakes · Coral Sea 2 6 0 — 0.5× / 4.2 Quakes · Ionian Sea 2 6 0 — 10× / 0.2 Derelicts · South Atlantic Ocean 2 6 0 — 1.3× / 1.6 Icebergs · South Pacific Ocean 2 5.6 1 3 10× / 0.2 Derelicts · Bay of Bengal 2 4.1 0 — 10× / 0.2 Derelicts · Gulf of Mexico 2 4.1 0 — 3.3× / 0.6 Exercises · Baltic Sea 2 2.5 0 — 2.5× / 0.8 Wrecks · Persian Gulf long running 1 124 4 417 5.0× / 0.2 Nav aids · Inner Seas off the West Coast of Scotland 1 96.4 3 211 0.3× / 3.6 Cable ops · Indian Ocean 1 76.4 3 57 1.3× / 0.8 Surveys · Arabian Sea long running 1 72.5 3 393 1.7× / 0.6 Nav aids · Sea of Okhotsk long running 1 70 2 773 5.0× / 0.2 Ordnance · North Sea long running 1 62 2 800 1.7× / 0.6 Cable ops · Persian Gulf 1 62 2 142 0.3× / 3.4 Volcanic · Philippine Sea long running 1 62 2 642 new / 0 Exercises · South China Sea 1 59.3 1 35 0.8× / 1.2 Wrecks · South Atlantic Ocean 1 47.5 2 110 5.0× / 0.2 Cable ops · Arabian Sea 1 39.5 1 31 0.4× / 2.4 Nav aids · Singapore Strait 1 38.7 2 186 new / 0 Surveys · Black Sea 1 38.4 2 56 5.0× / 0.2 Nav aids · South Pacific Ocean 1 35.5 1 95 1.3× / 0.8 Exercises · Laccadive Sea 1 33 1 32 0.3× / 3.2 Nav aids · Celtic Sea long running 1 31.7 1 463 0.3× / 3 Nav aids · Mediterranean Sea - Western Basin 1 31.3 2 71 new / 0 Nav aids · Irish Sea and St. George's Channel 1 31 1 66 0.4× / 2.4 Missiles · North Pacific Ocean 1 31 1 61 0.2× / 4.4 Incidents · Eastern China Sea 1 30.6 1 30 new / 0 Missiles · Aegean Sea long running 1 29.9 1 394 5.0× / 0.2 Surveys · Gulf of Suez 1 29.5 1 29 5.0× / 0.2 Surveys · Mediterranean Sea - Eastern Basin 1 29.2 0 — 0.3× / 3.4 Cable ops · Black Sea 1 25 0 — 2.5× / 0.4 Incidents · Sea of Okhotsk 1 24.6 1 24 5.0× / 0.2 Surveys · North Atlantic Ocean 1 22.6 1 22 1.7× / 0.6 Incidents · Mediterranean Sea - Western Basin 1 17.6 1 40 2.5× / 0.4 Incidents · Ligurian Sea 1 15.4 1 15 new / 0 Surveys · Indian Ocean 1 14.5 1 45 1.3× / 0.8 Cable ops · Philippine Sea 1 13.8 0 — 5.0× / 0.2 Other · Bay of Bengal 1 12.2 0 — new / 0 Spills · North Pacific Ocean 1 12 1 44 new / 0 Cable ops · Bay of Bengal 1 11.6 1 11 0.4× / 2.8 Surveys · Celtic Sea 1 10.9 0 — new / 0 Incidents · Philippine Sea 1 10.9 0 — 0.3× / 3.6 Piracy · South Atlantic Ocean 1 10.5 1 10 new / 0 Incidents · Singapore Strait 1 9.5 0 — 5.0× / 0.2 Other · English Channel 1 9.2 1 9 2.5× / 0.4 Cable ops · Makassar Strait 1 8.6 1 8 new / 0 Incidents · Solomon Sea 1 8.1 0 — 1.7× / 0.6 Ordnance · Aegean Sea 1 7.4 0 — new / 0 Incidents · Adriatic Sea 1 6.2 0 — 1.7× / 0.6 Cable ops · Strait of Gibraltar 1 6.2 0 — new / 0 Mines · Indian Ocean 1 6.1 0 — new / 0 Incidents · Malacca Strait 1 5.9 1 5 5.0× / 0.2 Incidents · Andaman or Burma Sea 1 5.7 1 5 5.0× / 0.2 Missiles · Laccadive Sea 1 5.3 0 — 1.0× / 1 Exercises · Bering Sea 1 5 0 — 5.0× / 0.2 Missiles · Indian Ocean 1 5 0 — 5.0× / 0.2 Quakes · Solomon Sea 1 3.5 1 33 0.4× / 2.6 Nav aids · Coral Sea 1 3.2 0 — 0.5× / 2.2 Cable ops · Celtic Sea 1 3.1 0 — 5.0× / 0.2 Derelicts · Coral Sea 1 3 0 — 0.6× / 1.6 Quakes · Flores Sea 1 3 0 — 5.0× / 0.2 Quakes · Indian Ocean 1 3 0 — 0.3× / 3 Quakes · North Atlantic Ocean 1 3 0 — 1.3× / 0.8 Derelicts · Persian Gulf 1 3 0 — new / 0 Debris · Philippine Sea 1 3 0 — 2.5× / 0.4 Icebergs · Southern Ocean 1 2.6 1 2 1.7× / 0.6 Nav aids · Arafura Sea 1 2.4 0 — new / 0 Exercises · Alboran Sea 1 2.3 0 — 5.0× / 0.2 Exercises · North Atlantic Ocean 1 2.3 1 2 0.5× / 2.2 Wrecks · Caribbean Sea 1 2 1 2 5.0× / 0.2 Incidents · Ionian Sea 1 1.8 0 — new / 0 Nav aids · Gulf of Alaska 1 1.6 0 — 0.4× / 2.6 Exercises · Coral Sea 1 1.4 1 1 1.7× / 0.6 Exercises · Mediterranean Sea - Eastern Basin 1 1 0 — 0.4× / 2.8 Piracy · Arabian Sea 1 0.9 0 — 0.1× / 10.4 Wrecks · Irish Sea and St. George's Channel 1 0.7 1 0 5.0× / 0.2 Piracy · Red Sea 1 0.7 0 — 5.0× / 0.2 Cable ops · Balearic (Iberian Sea) 1 0.4 1 0 new / 0 Derelicts · Philippine Sea 1 0.4 0 — 5.0× / 0.2 Surveys · Sea of Marmara 1 0.4 1 0 new / 0 Incidents · Great Australian Bight 1 0.3 0 — 2.5× / 0.4 Exercises · Indian Ocean 1 0.3 0 — 0.7× / 1.4 Debris · South Pacific Ocean 1 0.3 1 0 new / 0 Exercises · Philippine Sea 1 0.2 1 0 0.7× / 1.4 Incidents · Tasman Sea 1 0.1 0 — 0.7× / 1.4 Incidents · Bass Strait 1 0 0 — 5.0× / 0.2 Incidents · Timor Sea 1 0 0 — new / 0 Surveys · Arctic Ocean long running 0 155 5 1,194 — / 0 Surveys · Beaufort Sea long running 0 124 4 1,269 — / 0 Other · South Atlantic Ocean 0 124 4 88 0.0× / 1.2 Cable ops · South China Sea 0 111.5 3 160 0.0× / 0.8 Cable ops · Mozambique Channel 0 110 3 93 0.0× / 0.2 Nav aids · Arabian Sea long running 0 93 3 966 0.0× / 0.2 Nav aids · South China Sea long running 0 93 3 900 — / 0 Surveys · The Northwestern Passages long running 0 93 3 543 — / 0 Wrecks · The Northwestern Passages long running 0 86.3 1 1,244 — / 0 Nav aids · Caribbean Sea long running 0 65.5 2 434 0.0× / 0.4 Nav aids · Gulf of California 0 62.7 2 261 0.0× / 0.2 Nav aids · North Pacific Ocean long running 0 62.7 2 421 0.0× / 3.8 Wrecks · Arabian Sea 0 62 2 288 — / 0 Ordnance · Black Sea 0 62 2 217 — / 0 Nav aids · Kara Sea long running 0 62 2 877 — / 0 War risk · Mediterranean Sea - Eastern Basin long running 0 62 2 982 0.0× / 0.2 Other · North Pacific Ocean long running 0 62 2 655 0.0× / 0.2 Other · North Sea long running 0 62 2 506 0.0× / 0.8 Restricted · North Sea long running 0 62 2 893 — / 0 Structures · North Sea long running 0 62 2 900 — / 0 Wrecks · North Sea 0 62 2 326 0.0× / 1 Nav aids · Southern Ocean 0 62 2 70 — / 0 Incidents · Japan Sea 0 34.9 0 — 0.0× / 0.8 Derelicts · South China Sea 0 34.5 1 60 0.0× / 1.6 Other · South China Sea 0 34.5 1 163 0.0× / 0.2 Other · Adriatic Sea 0 31 1 88 — / 0 Wrecks · Arctic Ocean 0 31 1 161 — / 0 Wrecks · Barentsz Sea 0 31 1 106 — / 0 Nav aids · Bass Strait 0 31 1 305 0.0× / 0.6 Surveys · Bay of Bengal 0 31 1 52 0.0× / 0.2 Wrecks · Bay of Bengal 0 31 1 185 — / 0 Surveys · Bering Sea 0 31 1 189 — / 0 Mines · Black Sea 0 31 1 217 — / 0 Cable ops · Caribbean Sea 0 31 1 52 0.0× / 0.2 Other · Caribbean Sea 0 31 1 42 0.0× / 0.2 Surveys · Chukchi Sea long running 0 31 1 424 — / 0 Wrecks · Coral Sea 0 31 1 65 0.0× / 0.2 Nav aids · Eastern China Sea long running 0 31 1 717 — / 0 Wrecks · Eastern China Sea 0 31 1 91 — / 0 Surveys · Gulf of California 0 31 1 32 — / 0 Other · Gulf of Mexico 0 31 1 266 — / 0 Ordnance · Inner Seas off the West Coast of Scotland 0 31 1 238 — / 0 Cable ops · Java Sea 0 31 1 34 0.0× / 0.2 Cable ops · Kara Sea 0 31 1 69 — / 0 Nav aids · Laccadive Sea 0 31 1 280 0.0× / 0.2 Nav aids · Mediterranean Sea - Eastern Basin 0 31 1 56 0.0× / 1.2 Nav aids · Mozambique Channel 0 31 1 112 — / 0 Cable ops · North Atlantic Ocean 0 31 1 46 0.0× / 3.4 Structures · North Atlantic Ocean 0 31 1 164 — / 0 Wrecks · North Atlantic Ocean long running 0 31 1 846 — / 0 Nav aids · Persian Gulf 0 31 1 205 — / 0 Wrecks · Philippine Sea 0 31 1 77 — / 0 Restricted · Sea of Okhotsk long running 0 31 1 841 — / 0