The 2AP tracker is sun tracking and positioning instrument. It is used to accurately point small and medium sized payloads, either as a dedicated Suntracker or as a computer based Positioner. The 2AP incorporates two stepper motors controlled by an on-board micro-computer. After configuration as Suntracker by a host personal computer only occasional checks of the internal clock are required. The optional sun sensor kit provides active sun tracking capability for indefinite unattended operation.

The 2AP has a battery back-up for automatic restart after temporary power outages. When fitted with the optional Pointing and Shading Ball Assembly the 2AP provides mountings for up to three shaded pyranometers and four pyrheliometers.