In 1953, the would revolutionize submarine design around the world with its teardrop hull and round cross-section.

Lights blazed out from it suddenly, showing the teardrop hull and the Reiver stenciled across the bow.

They were built with teardrop hulls and the fin was built from glass fibre to keep weight down.

This design, already visible on very early submarines is called a "teardrop hull", and was patterned after the bodies of whales.

The boats had a teardrop hull and diving depth was 150m.

The teardrop shaped hull and large sail suggest heavy Kilo influence.

This design, visible in early submarines (see below) is sometimes called a "teardrop hull".

A teardrop hull is a submarine hull design which emphasizes hydrodynamic flow above all other factors.

The class is the first to be fully developed within China and also the first Chinese submarine to use the modern teardrop hull shape.

A crystal-faceted teardrop hull, similar to the ships that had once captured the Enterprise.