The S-82 “Narciso Monturiol” submarine, the second unit of the S-80 series, reached a new milestone in its development by ...

Inside a diesel engine's cylinder, compressed air raises the temperature to ignite injected fuel, and the resulting force drives pistons to power the vehicle's main gears. Chief to this combustion ...

Diesel engines cannot work without oxygen, so how do diesel submarines operate when they're underwater? Their propulsion system accounts for this limitation.

An Iranian navy logistics ship offloaded its crew to Sri Lanka on Friday after suffering engine trouble at sea, days after the U.S. sank an Iranian warship.

The submarine attack on the Dena, which had been making its way back from an international naval gathering hosted by India, ...

Japan now operates five cutting-edge Taigei-class submarines, in addition to its 12 Soryu-class and 6 Oyashio-class vessels.

Add Yahoo as a preferred source to see more of our stories on Google. An Iranian ship offloaded more than 200 members of its crew to Sri Lanka on Friday after suffering an engine failure at sea, just ...

Top 10: World War 2 British planes that deserve much greater fame ...

Sri Lanka discharged 22 Iranian crew from the hospital who were plucked from life rafts after their warship was sunk by a US ...

On the morning of April 14, 1988, the USS Samuel B. Roberts, an Oliver Hazard Perry-class frigate cruising through the ...

The move followed Wednesday's sinking of another Iranian warship by a U.S. submarine. Australia confirmed three Australians were on that submarine.