Hull
The term hull refers to the body or frame of a ship or starship. Warp-worthy vessels must have a hull able to withstand extreme accelerations. The hull of a Starfleet vessel was usually separated into two parts: the primary and secondary hulls. Hull plating was an external armor component of a starship's or shuttle's hull. Hull resiliency was a measurement of how well a hull could withstand damage.

The primary and secondary hulls of , , and  starships further consisted of an "outer" and "inner" hull. (; )

Borg cubes utilized technology that automatically regenerated their hull when damaged. (; ) Like Federation starships, they had an "inner hull" and an "outer hull" (or "outer skin"). ()

In 2151, Doctor Phlox was telling Miss 's class about locating a colony of spores on the hull of a craft, but was interrupted by Jonathan Archer before he could finish. ()

A Kyrian reconstruction of the  as the  in the holoprogram The Voyager Encounter had a triple-armored hull, but this was based on a partial, badly corroded schematic found in the Cyrik Ocean on the Kyrian and Vaskan homeworld, which accounted for inaccurate details. ()

Hull materials 
Duranium
Electroceramic
Kelindide
Magnesite
Monotanium
Neutronium
Polyduranide alloy
Tetraburnium
Titanium
Trinesium
Tritanium
Trititanium
Victurium

Hull enhancements 
 Ablative generator
 Ablative hull armor
 Dispersive armor
 Monotanium armor plating
 Parametallic hull plating
 Polarized hull plating
 Reactive armor
 Trellium-D

See also 
 Hull damage
 Hull signature
 Structural integrity field
 Sub-micron fracture

Appendices

Background information 
The basics of these incidents have been referenced in several episodes. More detailed explanations given by the writing and technical staff when creating the show are contained in the Star Trek: The Next Generation Technical Manual and the Star Trek: Deep Space Nine Technical Manual.

External link 
 

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Spacecraft components