There is only one file type that uses the .TSL extension:
Tracker Status Log
A TSL file is a Tracker Status log used by Subsite Electronics software such as TMS Plus and TSR Mobile. It contains horizontal directional drilling (HDD) tracking information for dill pipe locations, which includes the GPS coordinates, depth, and pitch.
TSL files are created by a TK Series HDD Guidance System used to log the drill pipe location. These files can then reviewed by the TSR, TMS Plus, and TSR Mobile applications.
Subsite Electronics specializes in HDD guidance systems for installing and maintaining underground pipe and cable. The applications allows you to plan bores, monitor real-time progress, and create reports.
Updated: October 30, 2016