Quakes · South Pacific Ocean 13 39.2 1 32 1.3× / 10 Exercises · North Pacific Ocean 11 50.7 1 35 1.6× / 7 Cable ops · South Atlantic Ocean 10 77.6 2 85 0.3× / 30.2 Quakes · North Pacific Ocean 10 27.1 1 21 1.6× / 6.4 Nav aids · North Sea surge 8 221.8 9 226 2.1× / 3.8 Incidents · Philippine Sea surge 8 10.9 0 — 2.7× / 3 Exercises · South Atlantic Ocean surge 7 85.8 3 35 8.8× / 0.8 Incidents · North Pacific Ocean 6 262.9 2 74 0.8× / 7.2 Cable ops · Mediterranean Sea - Eastern Basin surge 6 54.6 2 48 2.7× / 2.2 Exercises · Black Sea 6 41.9 0 — 0.9× / 6.6 Incidents · South Pacific Ocean long running 5 146.1 2 367 0.8× / 6 Missiles · North Pacific Ocean 5 60 2 91 0.9× / 5.6 Nav aids · Irish Sea and St. George's Channel 5 50.4 2 56 1.9× / 2.6 Derelicts · South Pacific Ocean surge 5 27.6 0 — 3.1× / 1.6 Exercises · Bay of Bengal 5 23.1 1 24 1.5× / 3.4 Surveys · Bristol Channel surge 5 20.1 1 20 2.8× / 1.8 Exercises · Laccadive Sea 5 10.6 1 24 0.9× / 5.6 Exercises · North Atlantic Ocean 4 105.4 1 176 0.4× / 10.8 Exercises · Yellow Sea surge 4 83.7 2 38 4.0× / 1 Surveys · North Atlantic Ocean surge 4 69.7 2 129 2.5× / 1.6 Exercises · Japan Sea surge 4 68.5 2 35 5.0× / 0.8 Cable ops · Mediterranean Sea - Western Basin surge 4 57 2 30 2.5× / 1.6 Other · South Atlantic Ocean surge 4 17 1 14 5.0× / 0.8 Quakes · Indian Ocean 4 14.1 0 — 0.9× / 4.4 Surveys · Mediterranean Sea - Western Basin surge 4 6.6 0 — 20× / 0.2 Nav aids · South Atlantic Ocean 3 136 5 201 0.4× / 7 Nav aids · Indian Ocean surge 3 122.6 5 82 3.8× / 0.8 Ordnance · North Sea surge 3 64.8 4 42 15× / 0.2 Cable ops · Celtic Sea 3 49.1 1 80 0.4× / 8.2 Exercises · Mediterranean Sea - Eastern Basin 3 36.2 3 63 0.7× / 4.4 Icebergs · South Atlantic Ocean 3 23.4 0 — 0.9× / 3.2 Derelicts · Mediterranean Sea - Eastern Basin 3 15.7 2 9 1.7× / 1.8 Exercises · South Pacific Ocean 3 13.2 0 — 1.7× / 1.8 Exercises · Aegean Sea 2 126.6 6 178 0.7× / 3 Cable ops · Bay of Bengal 2 120.2 3 194 2.0× / 1 Other · North Sea 2 113 3 72 3.3× / 0.6 Nav aids · English Channel 2 102 3 198 0.7× / 2.8 Wrecks · South China Sea new 2 83.4 3 306 new / 0 Nav aids · Celtic Sea 2 67.7 3 236 1.0× / 2 Nav aids · Inner Seas off the West Coast of Scotland long running 2 58.9 2 696 0.6× / 3.6 Other · North Atlantic Ocean 2 45.1 2 22 0.4× / 5 Wrecks · English Channel new 2 44.3 2 23 new / 0 Cable ops · North Sea 2 43.4 2 65 0.8× / 2.4 Other · Persian Gulf long running 2 42.6 2 604 3.3× / 0.6 Surveys · Sea of Okhotsk 2 42.6 2 21 10× / 0.2 Exercises · Malacca Strait 2 34.1 1 29 5.0× / 0.4 Surveys · Mediterranean Sea - Eastern Basin 2 31.1 2 21 2.5× / 0.8 Spills · Gulf of Mexico 2 17 1 16 1.3× / 1.6 Icebergs · Southern Ocean 2 13.5 2 6 10× / 0.2 Incidents · North Atlantic Ocean 2 6.6 1 69 0.4× / 5.6 Quakes · Molukka Sea 2 6 0 — 2.5× / 0.8 Derelicts · Gulf of Mexico new 2 5.4 0 — new / 0 Exercises · Arabian Sea 2 1.7 0 — 0.6× / 3.2 Wrecks · Irish Sea and St. George's Channel 1 126.6 4 297 5.0× / 0.2 Nav aids · Bay of Bengal long running 1 96.2 2 638 0.7× / 1.4 Cable ops · South China Sea 1 85.8 3 81 0.6× / 1.6 Other · Bay of Bengal 1 62.5 3 120 5.0× / 0.2 Nav aids · North Atlantic Ocean 1 61.5 2 56 0.3× / 4 Incidents · Mediterranean Sea - Eastern Basin 1 61.4 1 72 0.4× / 2.4 Incidents · Tasman Sea 1 57.3 0 — 1.0× / 1 Surveys · Bay of Bengal 1 54.3 2 240 new / 0 Nav aids · Caribbean Sea 1 49.4 2 195 5.0× / 0.2 Debris · North Pacific Ocean long running 1 36.7 1 379 5.0× / 0.2 Wrecks · Indian Ocean 1 35.8 2 206 new / 0 Nav aids · Mediterranean Sea - Western Basin 1 33.1 1 191 1.0× / 1 Incidents · South China Sea 1 30.1 0 — 0.6× / 1.6 Nav aids · Ionian Sea long running 1 30 1 584 2.5× / 0.4 Nav aids · Persian Gulf long running 1 30 1 1,304 1.0× / 1 Nav aids · South China Sea long running 1 30 1 743 1.7× / 0.6 Incidents · Bay of Bengal 1 28.5 0 — 2.5× / 0.4 Incidents · Bismarck Sea 1 27.9 0 — 2.5× / 0.4 Volcanic · Andaman or Burma Sea 1 24.3 1 24 new / 0 Exercises · Mediterranean Sea - Western Basin 1 23.5 0 — 0.4× / 2.8 Incidents · Arabian Sea 1 22 0 — 0.5× / 2 Derelicts · Bay of Bengal 1 22 0 — new / 0 Nav aids · Arafura Sea 1 14.2 1 14 new / 0 Spills · Caribbean Sea 1 14 0 — new / 0 Surveys · South Pacific Ocean 1 12.8 0 — new / 0 Surveys · Adriatic Sea 1 11.9 1 11 5.0× / 0.2 Other · Arabian Sea 1 10.3 1 83 2.5× / 0.4 Ordnance · Philippine Sea 1 10.3 1 10 1.3× / 0.8 Derelicts · South Atlantic Ocean 1 9.2 0 — 0.8× / 1.2 Surveys · Bay of Biscay 1 9.1 0 — 2.5× / 0.4 Debris · Bay of Biscay 1 6.4 0 — new / 0 Derelicts · Celtic Sea 1 6.4 0 — 1.7× / 0.6 Cable ops · Philippine Sea 1 6.4 1 6 5.0× / 0.2 Restricted · Irish Sea and St. George's Channel 1 6.3 1 6 new / 0 Cable ops · Labrador Sea 1 6.3 1 6 new / 0 Derelicts · Arabian Sea 1 6.2 0 — 0.7× / 1.4 Derelicts · North Atlantic Ocean 1 6.2 0 — 0.7× / 1.4 Debris · Tyrrhenian Sea 1 6.1 0 — 5.0× / 0.2 Exercises · Philippine Sea 1 6 0 — 1.0× / 1 Derelicts · Indian Ocean 1 5.5 0 — 1.3× / 0.8 Quakes · Southern Ocean 1 5.4 0 — new / 0 Cable ops · Arabian Sea 1 5.1 1 44 0.6× / 1.6 Spills · North Pacific Ocean 1 4 1 4 1.3× / 0.8 Cable ops · English Channel 1 3.6 1 3 0.3× / 3.2 Quakes · Bismarck Sea 1 3 0 — 1.7× / 0.6 Quakes · Gulf of California 1 3 0 — new / 0 Quakes · Sea of Okhotsk 1 3 0 — new / 0 Quakes · South Atlantic Ocean 1 3 0 — 2.5× / 0.4 Exercises · Gulf of Mexico 1 2.8 0 — 1.0× / 1 Other · Labrador Sea 1 2.1 1 2 2.5× / 0.4 Surveys · Coral Sea 1 1.8 0 — 5.0× / 0.2 Other · Inner Seas off the West Coast of Scotland 1 1 0 — 2.5× / 0.4 Surveys · Celtic Sea 1 0.8 1 0 0.1× / 10.2 Wrecks · Ionian Sea 1 0.6 0 — new / 0 Cable ops · Laccadive Sea 1 0.5 1 113 2.5× / 0.4 Quakes · Coral Sea 1 0.4 1 0 0.5× / 2 Incidents · Celtic Sea 1 0.1 0 — 1.3× / 0.8 Debris · Arabian Sea 1 0 0 — 5.0× / 0.2 Nav aids · Arabian Sea 0 240.5 7 352 0.0× / 0.8 Nav aids · Tasman Sea 0 180 6 312 0.0× / 0.4 Nav aids · South Pacific Ocean 0 171.5 4 290 0.0× / 1.4 Nav aids · Coral Sea long running 0 165.3 5 374 0.0× / 2.6 Surveys · Baffin Bay long running 0 150 5 637 — / 0 Wrecks · Persian Gulf 0 120.8 4 253 0.0× / 0.8 Nav aids · Tyrrhenian Sea 0 120 4 224 0.0× / 0.8 Wrecks · Arabian Sea 0 90 3 303 0.0× / 0.2 Surveys · Beaufort Sea long running 0 90 3 539 — / 0 Nav aids · Great Australian Bight 0 90 3 208 0.0× / 0.6 Exercises · Ionian Sea 0 90 3 178 0.0× / 1.6 Nav aids · Red Sea 0 90 3 332 0.0× / 0.4 Incidents · South Atlantic Ocean 0 82.3 0 — 0.0× / 5.2 Nav aids · Andaman or Burma Sea long running 0 75.8 1 365 0.0× / 0.6 Incidents · Indian Ocean 0 74.3 1 75 0.0× / 4.4 Surveys · Arabian Sea 0 60 2 110 0.0× / 0.2 Surveys · Arctic Ocean long running 0 60 2 539 — / 0 Nav aids · Bass Strait 0 60 2 142 0.0× / 0.4 Wrecks · Mediterranean Sea - Eastern Basin long running 0 60 2 367 0.0× / 0.2 Wrecks · North Sea 0 60 2 251 0.0× / 1 Piracy · Persian Gulf 0 60 2 142 — / 0 Wrecks · South Pacific Ocean long running 0 60 2 396 0.0× / 0.4 Surveys · Tasman Sea 0 60 2 156 — / 0 Wrecks · Yellow Sea long running 0 60 2 379 0.0× / 0.2 Nav aids · North Pacific Ocean 0 45.3 1 313 0.0× / 0.4 Wrecks · North Pacific Ocean 0 45.3 1 157 — / 0 Other · Coral Sea 0 30.5 0 — 0.0× / 0.4 Incidents · Coral Sea 0 30.5 0 — 0.0× / 4.6 Structures · Adriatic Sea 0 30 1 286 — / 0 Debris · Arctic Ocean 0 30 1 191 — / 0 Surveys · Bass Strait 0 30 1 40 0.0× / 0.2 Surveys · Bering Sea 0 30 1 72 — / 0 Cable ops · Black Sea 0 30 1 51 0.0× / 0.4 Wrecks · Caribbean Sea 0 30 1 162 — / 0 Surveys · Chukchi Sea 0 30 1 72 — / 0 Surveys · Greenland Sea long running 0 30 1 855 — / 0 Nav aids · Gulf of Mexico 0 30 1 80 0.0× / 0.4 Wrecks · Gulf of Mexico 0 30 1 276 0.0× / 0.6 Ordnance · Gulf of Oman long running 0 30 1 366 0.0× / 0.2 Nav aids · Gulf of Suez 0 30 1 215 0.0× / 0.8 Wrecks · Gulf of Suez 0 30 1 75 — / 0 Other · Indian Ocean 0 30 1 43 0.0× / 0.6 Restricted · Indian Ocean 0 30 1 67 0.0× / 0.2 Surveys · Indian Ocean 0 30 1 178 — / 0 Wrecks · Malacca Strait 0 30 1 265 0.0× / 0.4 Nav aids · Mediterranean Sea - Eastern Basin 0 30 1 314 — / 0 Nav aids · Mozambique Channel 0 30 1 79 0.0× / 0.4 Other · North Pacific Ocean 0 30 1 157 0.0× / 0.4 Restricted · Persian Gulf 0 30 1 42 — / 0 Structures · Persian Gulf 0 30 1 255 — / 0 War risk · Persian Gulf long running 0 30 1 423 — / 0 Surveys · Philippine Sea 0 30 1 54 — / 0 Nav aids · Singapore Strait 0 30 1 116 0.0× / 0.2 Wrecks · Singapore Strait long running 0 30 1 402 — / 0 Wrecks · South Atlantic Ocean 0 30 1 109 — / 0 Cable ops · South Pacific Ocean 0 30 1 124 0.0× / 0.2 Other · South Pacific Ocean 0 30 1 63 0.0× / 1 Surveys · Strait of Gibraltar 0 30 1 33 — / 0 Other · Tasman Sea 0 30 1 233 0.0× / 0.6 Cable ops · Tyrrhenian Sea 0 30 1 75 — / 0 Surveys · Balearic (Iberian Sea) 0 28.2 0 — — / 0 Surveys · English Channel 0 25.1 0 — 0.0× / 3.2 Wrecks · Bay of Bengal 0 21.7 0 — 0.0× / 0.2 Other · Singapore Strait 0 18 0 — 0.0× / 0.2 Other · Mediterranean Sea - Eastern Basin 0 17.2 0 — 0.0× / 0.6 Exercises · Tyrrhenian Sea 0 16.5 0 — 0.0× / 0.8 Nav aids · Laccadive Sea 0 15.3 0 — 0.0× / 0.6 Nav aids · Philippine Sea 0 15.3 0 — 0.0× / 0.4 Incidents · Tyrrhenian Sea 0 15.2 0 — 0.0× / 0.8 Nav aids · Bristol Channel 0 7.7 0 — 0.0× / 0.8 Wrecks · Laccadive Sea 0 6 0 — — / 0 Quakes · Philippine Sea 0 2.2 0 — 0.0× / 4 Containers · North Pacific Ocean 0 1 0 — — / 0 Wrecks · Bass Strait 0 0.8 0 — — / 0 Volcanic · Philippine Sea 0 0.8 0 — 0.0× / 0.2 Exercises · Red Sea 0 0.7 0 — 0.0× / 0.2 Ordnance · Mediterranean Sea - Western Basin 0 0 0 — 0.0× / 0.4 Cable ops · North Atlantic Ocean 0 0 0 — 0.0× / 9 Derelicts · Philippine Sea 0 0 0 — 0.0× / 0.4 Surveys · South Atlantic Ocean 0 0 0 — 0.0× / 1.4 Surveys · South China Sea 0 0 0 — 0.0× / 0.2