Ukraine has opened a new chapter in naval warfare, claiming to have crippled a high‑value Russian submarine with an explosive ...

The underwater hunt for the missing Malaysia Airlines jet resumed Thursday with the redeployment of the U.S. Navy-owned robotic submarine Bluefin-21, authorities said. The sub will spend six days ...

The robotic submarine aiding in the search for Flight MH370 resurfaced early for the second time in two days on Wednesday. Officials blamed a “technical issue” for Bluefin-21's early return from the ...