Leica Geosystemsreleased new firmware for the Sprinter 100M electronic levelswith line-leveling applications and onboard GSI (Grid Security Infrastructure) commands. The new line-leveling applications cover the most common field leveling procedures practiced by surveyors and engineers, including backsight and foresight (BF); backsight, foresight and foresight, backsight (BFFB); and backsight and intermediate sight and foresight (BIF). The new onboard commands facilitate two-way communication between the instrument and a PDA or data collector. Existing Leica Sprinter 100M instruments can be upgraded for a nominal fee, and new units may be ordered with this optional firmware. (Leica Geosystems, Norcross, Ga.)