Arctic One was a type of  Earth-based ship that was also used as a shuttle to transport to and from the moon. In the ENTERPRISE episode  'Regeneration' it discovers a Borg drone in the arctic which starts to assimilate it. This is the original version before the Borg start to modify it. It was designed by John Eaves, who gave it skids so it could land in the snow. The model is 4.9" (12.5 cm) long.