Class 1
The term class 1 might refer to:

 Class I destroyer, alternate name for the 
 Class I heavy cruiser, alternate name for the 
 Class 1 nebula, a type of nebula
 Class 1 probe, a type of probe
 Class 1 overseer, a title
 Class I scout, alternate name for the 
 Class 1 shuttle, a type of spacecraft
 Class I starship, a family of starships in service to Starfleet in the 23rd century
 Class 1 supervisor, a title
 Class 1 transport, a type of spacecraft
 Class I transport / tug, alternate name for the 
 Class 1 wormhole, a type of wormhole

You may also be looking for:

 , another series of classifications

Class 01