Star Trek: Expanded Universe Starship Cutaway #1.
The Ptolemy Class Tug Mk II the USS Hubble NCC-3848 by
as seen in my Celestia render "Almost Home", fav.me/d38gcav
The Mk II was a retrofit of the well known Ptolemy Class by
, which featured a small shuttlebay at the base of the ventral connection pylon.
Not all my own work, the cutaway is a modification of the canon Ptolemy Class Tug (see Star Trek: Canon Universe Starship Cutaway #7) which in turn is a heavy conversion of the Constitution Class (Classic) cutaway by
(see Star Trek: Canon Universe Starship Cutaway #1), as seen in Ex Astris Scientia - and freely available on Google Images.
Ptolemy MK II:
Background: Heavily modified by myself from the SFC3 "Vessel Library" background.
Disclaimer: Star Trek is a registered trademark of Paramount Pictures - no copyright infringement is intended.