What is Harushio-class submarine?

The Wielingen class is a class of four multi-functional frigates built for the Belgian Navy. The ships are named after sandbanks in the North Sea, not far from the Belgian...

The four De Zeven Provinciën-class frigates are highly advanced air-defence and command frigates in service with the Royal Navy of the Netherlands. This class of ships is also known as...

In mathematics, the Pontryagin classes, named after Lev Pontryagin, are certain characteristic classes of real vector bundles. The Pontryagin classes lie in cohomology groups with degrees a multiple of four.

The Padma class is a class of patrol vessels of the Bangladesh Navy. The ships were constructed at the Khulna Shipyard, through a development program overseen and supported by the...

Kora-class corvettes are guided missile corvettes, in active service with the Indian Navy and the National Coast Guard of Mauritius. Four vessels were built at Garden Reach Shipbuilders and Engineers...

The Abhay-class corvettes of the Indian Navy are customized variants of the Soviet Pauk-class corvettes. The class is primarily intended for coastal patrol and anti-submarine warfare. Three vessels of the...

The Aditya-class auxiliary ship is a class of replenishment and repair ships currently in service with the Indian Navy. The class is a modified and lengthened version of the original...

The A-Class Catamaran, often abbreviated to A-Cat, is a development class sailing catamaran for singlehanded racing.

Ton classes are categories used to identify classes of yachts.

A submarine branching unit is a piece of equipment used in submarine telecommunications cable systems to allow the cable to split to serve more than one destination. For example, one...