Oceanic trench
depressions of the sea floor
Calypso Deep
Manila Trench
Sulu Trench
South Sandwich Trench
Kuril–Kamchatka Trench
Japan Trench
Peru–Chile Trench
Cayman Trough
Aleutian Trench
Tonga Trench
Yap Trench
Middle America Trench
New Hebrides Trench
Beaufort's Dyke
Devil's Hole
New Britain Trench
Mariana Trench
Hellenic Trench
Philippine Trench
Puerto Rico Trench
Manus Trench
Tasman Fracture