Icebergs · Labrador Sea surge 27 29.3 2 32 10× / 2.6 Incidents · North Pacific Ocean 24 102.5 4 47 1.5× / 16.4 Exercises · Black Sea surge 19 111.8 2 34 5.0× / 3.8 Exercises · North Pacific Ocean 18 94.9 3 35 1.5× / 12 Incidents · North Atlantic Ocean 17 252.7 11 72 1.9× / 9 Exercises · Yellow Sea surge 16 130 7 36 2.4× / 6.8 Incidents · South China Sea 15 93.1 1 62 1.6× / 9.4 Nav aids · North Sea long running 14 383.5 12 607 1.6× / 8.6 Missiles · North Atlantic Ocean surge 14 51.4 2 37 3.5× / 4 Incidents · South Pacific Ocean surge 13 53.6 0 — 3.3× / 4 Incidents · Indian Ocean 12 51.5 0 — 1.1× / 10.8 Incidents · Mediterranean Sea - Eastern Basin 10 44.1 4 33 1.7× / 5.8 Incidents · Gulf of Mexico surge 8 133.4 4 45 5.0× / 1.6 Cable ops · South China Sea 7 308 11 251 1.8× / 3.8 Cable ops · North Atlantic Ocean 7 245.6 7 131 1.2× / 5.8 Nav aids · Caribbean Sea surge long running 7 161.4 10 431 18× / 0.4 Nav aids · North Atlantic Ocean long running 6 427.3 15 483 1.3× / 4.8 Exercises · Philippine Sea 6 73.3 3 43 1.9× / 3.2 Cable ops · Kara Sea surge 6 65 6 250 10× / 0.6 Incidents · Coral Sea 6 48 3 29 1.7× / 3.6 Nav aids · Irish Sea and St. George's Channel surge 6 40.2 2 96 3.0× / 2 Missiles · North Pacific Ocean 6 28.7 2 35 1.0× / 6.2 Quakes · South Pacific Ocean 6 23.1 0 — 0.5× / 12.2 Quakes · North Pacific Ocean 6 19.2 0 — 0.8× / 7.4 Incidents · Philippine Sea surge 6 18.5 1 30 5.0× / 1.2 Exercises · Mediterranean Sea - Eastern Basin 6 9.4 0 — 1.4× / 4.2 Incidents · Caribbean Sea surge 5 112.4 2 51 2.3× / 2.2 Derelicts · South Pacific Ocean surge long running 5 69.1 2 764 5.0× / 1 Spills · Gulf of Mexico 5 28 4 15 1.0× / 5.2 Missiles · South Pacific Ocean surge 5 18.5 1 27 5.0× / 1 Quakes · Bismarck Sea surge 5 14.4 1 18 6.3× / 0.8 Incidents · South Atlantic Ocean 5 13 0 — 0.8× / 6.2 Icebergs · North Atlantic Ocean new 5 7.3 0 — new / 0 Cable ops · Norwegian Sea 4 133.5 5 89 1.1× / 3.8 Cable ops · South Atlantic Ocean 4 132 2 113 0.1× / 28.2 Exercises · South China Sea 4 65.5 4 34 1.1× / 3.6 Surveys · South Atlantic Ocean 4 63.5 3 113 0.8× / 4.8 Exercises · Bay of Bengal 4 56.7 1 37 0.8× / 4.8 Cable ops · North Sea 4 46.9 2 73 0.9× / 4.6 Derelicts · North Atlantic Ocean 4 29.9 0 — 1.8× / 2.2 Incidents · Bay of Bengal 4 15.8 0 — 1.8× / 2.2 Exercises · Gulf of Mexico surge 4 15.7 2 31 10× / 0.4 Exercises · Baltic Sea surge 4 11.2 0 — 2.2× / 1.8 Nav aids · South Atlantic Ocean long running 3 288.4 10 1,062 0.4× / 6.8 Nav aids · Gulf of Mexico long running 3 124.7 4 996 0.9× / 3.2 Nav aids · Inner Seas off the West Coast of Scotland long running 3 68.9 2 392 1.4× / 2.2 Piracy · South China Sea surge 3 54.6 1 43 3.0× / 1 Spills · North Pacific Ocean surge 3 42 1 44 2.5× / 1.2 Spills · The Coastal Waters of Southeast Alaska and British Columbia surge 3 42 0 — 7.5× / 0.4 Surveys · Sea of Azov surge 3 29.1 1 39 15× / 0.2 Surveys · Kara Sea surge 3 21.4 3 8 15× / 0.2 Containers · Arabian Sea surge 3 9 0 — 3.8× / 0.8 Quakes · Bering Sea surge 3 9 0 — 5.0× / 0.6 Quakes · Southern Ocean surge 3 9 0 — 3.0× / 1 Derelicts · South Atlantic Ocean surge 3 8.9 0 — 3.0× / 1 Quakes · Solomon Sea 3 7.3 1 27 1.1× / 2.6 Surveys · Celtic Sea new 3 5 0 — new / 0 Derelicts · Arabian Sea surge 3 3.4 1 3 5.0× / 0.6 Nav aids · North Pacific Ocean long running 2 181.2 6 602 0.7× / 2.8 Surveys · North Atlantic Ocean 2 80.9 2 62 1.3× / 1.6 Nav aids · Celtic Sea long running 2 74.8 3 644 0.9× / 2.2 Other · North Sea long running 2 68 2 687 2.5× / 0.8 Other · North Pacific Ocean long running 2 64.9 2 836 2.0× / 1 Surveys · South China Sea 2 51.9 2 30 10× / 0.2 Other · Arabian Sea 2 48 1 65 5.0× / 0.4 Other · North Atlantic Ocean new 2 44 1 262 new / 0 Nav aids · Laccadive Sea new long running 2 43.3 2 461 new / 0 Exercises · Arabian Sea 2 41.2 1 35 0.7× / 3 Spills · North Atlantic Ocean 2 40 0 — 1.0× / 2 Exercises · South Atlantic Ocean 2 29.3 0 — 0.2× / 8.6 Exercises · North Atlantic Ocean 2 20.6 1 35 0.8× / 2.4 Surveys · Gulf of Suez 2 20.2 0 — 10× / 0.2 Wrecks · Gulf of Mexico new 2 20.1 1 13 new / 0 Incidents · Banda Sea new 2 18.1 0 — new / 0 Cable ops · Andaman or Burma Sea new 2 16.6 0 — new / 0 Towing · Tyrrhenian Sea new 2 16.6 0 — new / 0 Incidents · Aegean Sea new 2 16.1 0 — new / 0 Exercises · Laccadive Sea 2 15.6 1 14 0.6× / 3.2 Derelicts · North Pacific Ocean 2 15 1 23 0.6× / 3.2 Exercises · Andaman or Burma Sea 2 10.9 0 — 2.0× / 1 Quakes · South Atlantic Ocean 2 10.5 0 — 3.3× / 0.6 Derelicts · South China Sea 2 9.3 0 — 2.0× / 1 Quakes · North Atlantic Ocean 2 7.2 1 31 5.0× / 0.4 Quakes · Coral Sea 2 6 0 — 1.4× / 1.4 Icebergs · Davis Strait 2 6 0 — 0.2× / 8.8 Containers · Eastern China Sea new 2 6 0 — new / 0 Derelicts · Indian Ocean 2 6 0 — 0.4× / 4.8 Quakes · Indian Ocean 2 6 0 — 1.0× / 2 Incidents · Java Sea 2 5.5 0 — 5.0× / 0.4 Icebergs · South Atlantic Ocean 2 5.3 1 8 0.6× / 3.2 Icebergs · Barentsz Sea new 2 3.5 1 23 new / 0 Nav aids · Great Australian Bight 2 2 0 — 10× / 0.2 Exercises · Bering Sea 2 1.5 0 — 2.0× / 1 Incidents · Hudson Bay 2 0.5 0 — 5.0× / 0.4 Nav aids · The Coastal Waters of Southeast Alaska and British Columbia 2 0.1 0 — 1.0× / 2 Surveys · Arctic Ocean long running 1 143.5 5 1,375 0.7× / 1.4 Surveys · Beaufort Sea long running 1 124 4 1,450 0.3× / 3.2 Restricted · North Sea long running 1 123.8 4 1,074 1.3× / 0.8 Cable ops · Persian Gulf 1 122.5 4 272 1.0× / 1 Nav aids · English Channel long running 1 85.2 3 847 0.5× / 2 Nav aids · Indian Ocean long running 1 69.7 2 406 1.3× / 0.8 Nav aids · Coral Sea 1 69.4 2 104 0.5× / 2 Other · Indian Ocean 1 68.1 3 172 2.5× / 0.4 Exercises · Aegean Sea 1 63 3 210 5.0× / 0.2 Surveys · Black Sea 1 62 2 119 0.7× / 1.4 Volcanic · Philippine Sea long running 1 62 2 823 new / 0 Wrecks · South China Sea 1 59.5 2 80 2.5× / 0.4 Surveys · Arabian Sea long running 1 57.9 1 496 new / 0 Other · Mediterranean Sea - Eastern Basin 1 39.6 1 106 2.5× / 0.4 Cable ops · Gulf of Mexico 1 37 2 181 2.5× / 0.4 Incidents · Mozambique Channel 1 35.2 0 — 1.7× / 0.6 Other · Caribbean Sea 1 34 1 223 new / 0 Surveys · Barentsz Sea 1 33.5 1 42 2.5× / 0.4 Nav aids · Bass Strait long running 1 32.1 1 486 2.5× / 0.4 Restricted · Black Sea long running 1 31.9 1 421 new / 0 Cable ops · Sea of Okhotsk 1 31.6 2 71 1.0× / 1 Cable ops · Baltic Sea 1 31 1 83 new / 0 Surveys · Bering Sea long running 1 31 1 370 1.7× / 0.6 Incidents · Laccadive Sea 1 30.2 1 30 1.7× / 0.6 Nav aids · Gulf of Alaska 1 22.5 1 22 0.4× / 2.6 Incidents · Gulf of Guinea 1 18.6 1 18 5.0× / 0.2 Structures · Gulf of Suez 1 16.5 0 — new / 0 Spills · Bering Sea 1 14 0 — 5.0× / 0.2 Cable ops · Gulf of Guinea 1 12.3 1 12 1.7× / 0.6 Wrecks · Makassar Strait 1 11.5 1 11 new / 0 Restricted · Barentsz Sea 1 10.7 1 10 new / 0 Incidents · Davis Strait 1 10.5 0 — 0.5× / 2 Piracy · Sulu Sea 1 10 0 — new / 0 Wrecks · English Channel 1 8.8 1 8 1.7× / 0.6 Structures · Arabian Sea 1 8.5 1 8 new / 0 Missiles · Barentsz Sea 1 7.4 0 — 1.7× / 0.6 Incidents · Singapore Strait 1 7 0 — 5.0× / 0.2 Other · Sea of Okhotsk 1 6.6 1 6 new / 0 Ordnance · North Pacific Ocean 1 6.3 1 6 2.5× / 0.4 Debris · North Atlantic Ocean 1 5.9 0 — 5.0× / 0.2 Missiles · Indian Ocean 1 5.8 0 — new / 0 Quakes · Philippine Sea 1 5.8 0 — 0.8× / 1.2 Piracy · Gulf of Guinea 1 5.7 1 5 1.7× / 0.6 Nav aids · Timor Sea 1 5.3 0 — 0.8× / 1.2 Missiles · Laccadive Sea 1 4.7 0 — 1.3× / 0.8 Missiles · Gulf of Guinea 1 4.6 0 — new / 0 Surveys · Inner Seas off the West Coast of Scotland 1 4.4 1 4 new / 0 Derelicts · Caribbean Sea 1 4.2 0 — 2.5× / 0.4 Exercises · Sea of Azov 1 4.2 0 — new / 0 Cable ops · Inner Seas off the West Coast of Scotland 1 4.1 0 — new / 0 Missiles · Bay of Bengal 1 3.9 0 — 1.3× / 0.8 Surveys · North Sea 1 3.9 0 — 1.7× / 0.6 Surveys · Bay of Bengal 1 3.7 1 3 new / 0 Incidents · Andaman or Burma Sea 1 3.5 0 — new / 0 Exercises · Eastern China Sea 1 3.3 1 3 1.3× / 0.8 Quakes · Arabian Sea 1 3 0 — new / 0 Incidents · Arabian Sea 1 3 0 — 1.3× / 0.8 Derelicts · Coral Sea 1 3 0 — 0.7× / 1.4 Containers · Gulf of Aden 1 3 0 — new / 0 Quakes · Gulf of Alaska 1 3 0 — 1.7× / 0.6 Derelicts · Gulf of Mexico 1 3 0 — 1.7× / 0.6 Icebergs · Hudson Strait 1 3 0 — 1.0× / 1 Derelicts · Kara Sea 1 3 0 — new / 0 Debris · South Pacific Ocean 1 3 0 — new / 0 Other · The Northwestern Passages 1 3 0 — 1.7× / 0.6 Exercises · Gulf of Alaska 1 2.4 0 — 5.0× / 0.2 Derelicts · Gulf of Alaska 1 2 1 2 new / 0 Other · Bering Sea 1 1.9 0 — 5.0× / 0.2 Other · Bali Sea 1 1.8 0 — new / 0 Storms · North Atlantic Ocean 1 1.6 0 — new / 0 Nav aids · Bristol Channel 1 1.5 0 — 2.5× / 0.4 Incidents · Makassar Strait 1 1.5 0 — new / 0 Surveys · Sea of Okhotsk 1 1.5 1 1 1.0× / 1 Towing · Arctic Ocean 1 1.3 1 1 new / 0 Incidents · Baltic Sea 1 1.1 0 — new / 0 Derelicts · North Sea 1 0.9 0 — 5.0× / 0.2 Incidents · Bali Sea 1 0.8 0 — new / 0 Surveys · Andaman or Burma Sea 1 0.5 1 0 new / 0 Other · English Channel 1 0.5 0 — 5.0× / 0.2 Quakes · Andaman or Burma Sea 1 0.4 1 0 new / 0 Other · Arafura Sea 1 0.4 0 — 1.0× / 1 Incidents · Baffin Bay 1 0.3 0 — new / 0 Other · Davis Strait 1 0.3 1 0 5.0× / 0.2 Nav aids · Hudson Bay 1 0.3 0 — new / 0 Incidents · Hudson Strait 1 0.2 0 — 5.0× / 0.2 Incidents · Balearic (Iberian Sea) 1 0 0 — new / 0 Nav aids · Arabian Sea long running 0 155 5 1,147 0.0× / 0.2 Wrecks · Arabian Sea long running 0 124 4 469 0.0× / 0.4 Structures · North Sea long running 0 124 4 1,081 0.0× / 0.4 Nav aids · South China Sea long running 0 124 4 1,081 — / 0 Cable ops · Barentsz Sea 0 93 3 113 0.0× / 1.2 Wrecks · Persian Gulf long running 0 93 3 598 — / 0 Other · South China Sea 0 93 3 344 0.0× / 0.2 Surveys · The Northwestern Passages long running 0 93 3 724 0.0× / 0.6 Nav aids · Sea of Okhotsk long running 0 63.5 2 954 0.0× / 0.2 Towing · Barentsz Sea 0 62 2 52 — / 0 Nav aids · Bay of Bengal 0 62 2 146 0.0× / 0.4 Cable ops · Black Sea 0 62 2 38 0.0× / 1.4 Surveys · Caribbean Sea 0 62 2 36 — / 0 Nav aids · Gulf of California long running 0 62 2 442 — / 0 Exercises · Ionian Sea 0 62 2 210 — / 0 Nav aids · Kara Sea long running 0 62 2 1,058 — / 0 War risk · Mediterranean Sea - Eastern Basin long running 0 62 2 1,163 — / 0 Wrecks · North Sea long running 0 62 2 507 0.0× / 0.2 Nav aids · Persian Gulf long running 0 62 2 386 0.0× / 0.4