Quakes · North Pacific Ocean 11 31.5 1 29 — Quakes · Celebes Sea 9 27 0 — — Surveys · North Atlantic Ocean long running 8 458.6 19 909 — Quakes · South Pacific Ocean 5 17.9 0 — — Spills · North Atlantic Ocean long running 4 60 4 1,440 — Spills · Gulf of Mexico 4 49 2 43 — Quakes · Philippine Sea 4 12 0 — — Nav aids · Caribbean Sea long running 3 2,186.5 74 1,960 — Nav aids · Great Australian Bight 3 35.9 4 138 — Spills · The Coastal Waters of Southeast Alaska and British Columbia 3 31 2 16 — Quakes · South Atlantic Ocean 3 9 0 — — Surveys · Black Sea long running 2 141 6 732 — Cable ops · Tasman Sea 2 33 3 74 — Nav aids · Singapore Strait 2 19.6 2 9 — Exercises · Mediterranean Sea - Western Basin 2 9.6 2 5 — Quakes · Caribbean Sea 2 6 0 — — Nav aids · North Atlantic Ocean long running 1 967.3 33 1,645 — Nav aids · South Atlantic Ocean long running 1 904 31 1,179 — Surveys · South Atlantic Ocean long running 1 403.9 14 1,057 — Wrecks · North Atlantic Ocean long running 1 268.2 9 986 — Cable ops · North Atlantic Ocean long running 1 240.5 9 741 — Nav aids · Bering Sea long running 1 151.2 6 1,285 — Nav aids · Persian Gulf long running 1 150.4 6 1,498 — Nav aids · Arabian Sea long running 1 130.3 5 1,707 — Surveys · Gulf of Mexico long running 1 75.3 3 725 — Cable ops · Black Sea 1 56.4 2 266 — Nav aids · The Coastal Waters of Southeast Alaska and British Columbia long running 1 44.2 2 1,206 — Spills · North Pacific Ocean 1 42 0 — — Other · Great Australian Bight 1 32 2 31 — Nav aids · Sea of Okhotsk long running 1 31.6 2 517 — Spills · Beaufort Sea 1 14 0 — — Spills · Gulf of Alaska 1 14 0 — — Mines · Persian Gulf 1 12.1 1 12 — Nav aids · Gulf of Guinea 1 10.5 1 10 — Quakes · Banda Sea 1 3 0 — — Quakes · Gulf of Mexico 1 3 0 — — Quakes · Gulf of Tomini 1 3 0 — — Quakes · Japan Sea 1 3 0 — — Quakes · Southern Ocean 1 3 0 — — Quakes · Tasman Sea 1 3 0 — — Quakes · Tyrrhenian Sea 1 3 0 — — Icebergs · Southern Ocean 1 0.4 1 0 — Quakes · Gulf of California 1 0.2 1 0 — Nav aids · South Pacific Ocean long running 0 630 21 1,559 — Exercises · North Pacific Ocean long running 0 480 16 613 — Cable ops · Arabian Sea 0 450 15 109 — Surveys · Indian Ocean long running 0 450 15 1,222 — Volcanic · Philippine Sea long running 0 450 15 2,020 — Nav aids · North Pacific Ocean long running 0 420 14 1,546 — Nav aids · Gulf of Mexico long running 0 360 12 1,915 — Wrecks · Arabian Sea long running 0 330 11 1,141 — Wrecks · Persian Gulf long running 0 270 9 1,595 — Wrecks · South Atlantic Ocean long running 0 270 9 972 — Wrecks · The Northwestern Passages long running 0 270 9 1,762 — Wrecks · Caribbean Sea long running 0 240 8 1,206 — Surveys · The Northwestern Passages long running 0 210 7 1,411 — Exercises · Bay of Bengal 0 180 6 92 — Nav aids · Celtic Sea long running 0 180 6 1,023 — Nav aids · South China Sea long running 0 180 6 939 — Surveys · Arabian Sea 0 150 5 168 — Nav aids · Beaufort Sea long running 0 150 5 1,419 — Mines · Black Sea long running 0 150 5 1,587 — Nav aids · Indian Ocean long running 0 150 5 1,042 — Nav aids · Irish Sea and St. George's Channel long running 0 150 5 933 — Missiles · North Atlantic Ocean long running 0 150 5 668 — Cable ops · Persian Gulf long running 0 150 5 1,196 — Surveys · Persian Gulf long running 0 150 5 1,411 — Wrecks · South China Sea long running 0 150 5 2,672 — Surveys · South Pacific Ocean long running 0 150 5 872 — Nav aids · Andaman or Burma Sea long running 0 120 4 1,149 — Exercises · Arabian Sea 0 120 4 95 — Surveys · Arctic Ocean long running 0 120 4 979 — Exercises · Black Sea long running 0 120 4 1,560 — Other · Caribbean Sea long running 0 120 4 1,217 — Cable ops · Celtic Sea long running 0 120 4 790 — Nav aids · English Channel long running 0 120 4 970 — Nav aids · Gulf of Alaska long running 0 120 4 848 — Other · Indian Ocean long running 0 120 4 896 — Other · North Atlantic Ocean long running 0 120 4 798 — Missiles · North Pacific Ocean long running 0 120 4 1,218 — Missiles · South Pacific Ocean long running 0 120 4 598 — Nav aids · Bay of Biscay long running 0 90 3 1,432 — Ordnance · Bay of Biscay long running 0 90 3 1,107 — Spills · Caribbean Sea long running 0 90 3 866 — Nav aids · Coral Sea long running 0 90 3 782 — Exercises · Gulf of California long running 0 90 3 613 — Nav aids · Hudson Strait long running 0 90 3 1,082 — Cable ops · Indian Ocean long running 0 90 3 830 — Nav aids · Laccadive Sea long running 0 90 3 1,111 — Wrecks · Laccadive Sea long running 0 90 3 1,229 — Exercises · North Atlantic Ocean long running 0 90 3 676 — Other · North Pacific Ocean long running 0 90 3 798 — Wrecks · North Pacific Ocean long running 0 90 3 1,285 — Other · Persian Gulf long running 0 90 3 1,230 — Cable ops · Philippine Sea long running 0 90 3 784 — Exercises · Philippine Sea 0 90 3 83 — Nav aids · Philippine Sea long running 0 90 3 922 — Wrecks · South Pacific Ocean long running 0 90 3 1,184 — Surveys · Timor Sea long running 0 90 3 850 — Exercises · Aegean Sea 0 60 2 147 — Nav aids · Arafura Sea long running 0 60 2 784 — Surveys · Bass Strait long running 0 60 2 781 — Nav aids · Bay of Bengal 0 60 2 167 — Wrecks · Bay of Bengal long running 0 60 2 1,070 — Other · Bay of Biscay long running 0 60 2 1,259 — Surveys · Bay of Biscay long running 0 60 2 720 — Surveys · Bering Sea 0 60 2 351 — War risk · Black Sea long running 0 60 2 1,561 — Exercises · Caribbean Sea long running 0 60 2 1,012 — Surveys · Caribbean Sea long running 0 60 2 783 — Surveys · Chukchi Sea long running 0 60 2 1,056 — Wrecks · Coral Sea long running 0 60 2 1,460 — Wrecks · Gulf of Guinea 0 60 2 40 — Wrecks · Gulf of Mexico long running 0 60 2 1,570 — Nav aids · Gulf of Oman long running 0 60 2 814 — Missiles · Indian Ocean 0 60 2 99 — Surveys · Irish Sea and St. George's Channel long running 0 60 2 803 — Surveys · Kara Sea long running 0 60 2 1,436 — Wrecks · Kara Sea long running 0 60 2 987 — Nav aids · Mediterranean Sea - Eastern Basin long running 0 60 2 1,854 — Debris · North Pacific Ocean long running 0 60 2 371 — Towing · North Pacific Ocean long running 0 60 2 826 — Volcanic · North Pacific Ocean long running 0 60 2 911 — Nav aids · North Sea long running 0 60 2 820 — Restricted · Persian Gulf long running 0 60 2 540 — Surveys · Sea of Okhotsk 0 60 2 68 — Cable ops · South Atlantic Ocean long running 0 60 2 663 — Cable ops · South Pacific Ocean long running 0 60 2 615 — Cable ops · Sulu Sea long running 0 60 2 835 — Exercises · Tasman Sea 0 60 2 84 — Nav aids · Tasman Sea long running 0 60 2 785 — Other · Adriatic Sea 0 30 1 121 — Missiles · Aegean Sea 0 30 1 147 — Exercises · Andaman or Burma Sea 0 30 1 95 — Surveys · Andaman or Burma Sea 0 30 1 85 — Other · Arabian Sea 0 30 1 78 — Wrecks · Arafura Sea long running 0 30 1 901 — Nav aids · Arctic Ocean long running 0 30 1 991 — Cable ops · Bass Strait 0 30 1 75 — Derelicts · Bass Strait long running 0 30 1 809 — Wrecks · Bass Strait 0 30 1 93 — Other · Bay of Bengal long running 0 30 1 1,060 — Surveys · Bay of Bengal 0 30 1 89 — Debris · Bay of Biscay long running 0 30 1 1,392 — Wrecks · Bay of Biscay long running 0 30 1 763 — Other · Beaufort Sea long running 0 30 1 809 — Surveys · Beaufort Sea long running 0 30 1 1,056 — Nav aids · Black Sea long running 0 30 1 652 — Other · Black Sea long running 0 30 1 819 — Cable ops · Caribbean Sea long running 0 30 1 876 — Derelicts · Caribbean Sea long running 0 30 1 720 — Surveys · Celtic Sea long running 0 30 1 707 — Quakes · Coral Sea long running 0 30 1 951 — Other · Davis Strait 0 30 1 221 — Wrecks · Eastern China Sea long running 0 30 1 1,068 — Wrecks · English Channel long running 0 30 1 804 — Cable ops · Great Australian Bight 0 30 1 31 — Wrecks · Great Australian Bight 0 30 1 77 — Nav aids · Gulf of California long running 0 30 1 1,537 — Cable ops · Gulf of Guinea long running 0 30 1 787 — Exercises · Gulf of Mexico long running 0 30 1 684 — Storms · Gulf of Mexico long running 0 30 1 638 — Derelicts · Gulf of Oman long running 0 30 1 376 — Wrecks · Gulf of Suez long running 0 30 1 893 — Nav aids · Hudson Bay long running 0 30 1 714 — Wrecks · Hudson Bay long running 0 30 1 1,078 — Wrecks · Hudson Strait 0 30 1 242 — Derelicts · Indian Ocean 0 30 1 74 — Restricted · Indian Ocean long running 0 30 1 837 — Nav aids · Inner Seas off the West Coast of Scotland long running 0 30 1 656 — Exercises · Irish Sea and St. George's Channel long running 0 30 1 638 — Other · Irish Sea and St. George's Channel long running 0 30 1 799 — Wrecks · Irish Sea and St. George's Channel long running 0 30 1 789 — Cable ops · Java Sea long running 0 30 1 978 — Icebergs · Labrador Sea long running 0 30 1 637 — Exercises · Laccadive Sea 0 30 1 84 — Missiles · Laccadive Sea 0 30 1 74 — Surveys · Laccadive Sea long running 0 30 1 1,599 — Cable ops · Ligurian Sea long running 0 30 1 925 — Cable ops · Makassar Strait 0 30 1 154 — Surveys · Makassar Strait 0 30 1 154 — Surveys · Malacca Strait 0 30 1 217 — Other · Mediterranean Sea - Eastern Basin long running 0 30 1 799 — Surveys · Mediterranean Sea - Eastern Basin long running 0 30 1 918 — Cable ops · Mediterranean Sea - Western Basin long running 0 30 1 796 — Surveys · Mediterranean Sea - Western Basin long running 0 30 1 665 — Restricted · Mozambique Channel 0 30 1 170 — Structures · Mozambique Channel long running 0 30 1 1,218 — Derelicts · North Atlantic Ocean long running 0 30 1 973 — Cable ops · North Pacific Ocean long running 0 30 1 610 — Structures · North Pacific Ocean 0 30 1 243 — Other · North Sea long running 0 30 1 638 — Surveys · Norwegian Sea long running 0 30 1 795 — Storms · Philippine Sea 0 30 1 79 — Derelicts · Red Sea long running 0 30 1 558 — Exercises · South Atlantic Ocean long running 0 30 1 636 — Icebergs · South Atlantic Ocean long running 0 30 1 637 — Cable ops · South China Sea long running 0 30 1 884 — Surveys · South China Sea long running 0 30 1 784 — Exercises · South Pacific Ocean 0 30 1 75 —