The Teledrift™ ProShot™ measurement-while-drilling (MWD) tool is a self-contained tool that uses positive mud-pulsing technology to provide inclination and azimuth measurements for vertical downhole drilling. The tool arrives at the rigsite assembled and loaded into the drill collar, ready to be integrated into the bottomhole assembly by the rig crew. This preassembly, which eliminates the necessity of onsite construction, reduces downtime. The ProShot tool is made of robust materials to promote longevity in the field and ensure that washing from mud flow is minimized. This enables longer, more accurate runs.