Ships and submarines fight wars above the waves and below, but which of those two is faster? We break down the differences in speed between the two.

Submarines need to operate stealthily and quietly. In some areas, warming waters and changing salinity levels could make that easier.

At least six people are believed to be dead and another nine injured — six critically — after a tourist submarine sank off of Egypt’s Red Sea coast Thursday.

Higher carbon-dioxide levels in the atmosphere change all these things. The gas’s mere presence acidifies seawater. Its warming effects alters its temperature, and by melting ice changes the salinity, too. Sources of ambient noise such as winds, waves and whales are all affected. And the changes all differ from place to place.

The Italian Navy will study the upgrade of its in-service U212A Todaro-class submarines with technologies developed for the U212 NFS program.

GD secures a $1.07 billion contract to provide long lead time material associated with Virginia Class Block VI submarines.

The Kalibr cruise missile, which has a range of up to 1,550 miles, has seen extensive use in strikes against Ukraine.

Questions are now being asked about what caused the vessel to sink - and the security measured around such tours.

At UDT 2025 exhibition in Oslo, Norway, Turkiye's leading company Aselsan showcased MERCAN family of submarine optronic mast systems