Follows the ship matched to the selected radar contact (true position and velocity) and extrapolates the last contact when no ship is loaded, so notching or the radar speed gate no longer removes the pipper. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YVREx3uo7nz1FEhzveWTUh