spherical

Most deep-sea subs have a spherical hull, so the effect of the crushing pressure of the deep is distributed equally.

Titan’s hull was also an unusual shape - cylindrical, rather than spherical.

Scientists describe it as a giant spherical shell around our solar system made of icy, comet-like objects.

The shape of its hull - the part where the passengers were - was cylindrical rather than spherical so the effects of the pressure were not distributed evenly.

Titan’s hull was also an unusual shape - cylindrical, rather than spherical.