TZ Professional v4 excels at "Target Tracking." You can overlay AIS targets and Radar images directly onto your charts. The "ARPA" safety features (Automatic Radar Plotting Aid) provide clear collision warnings, which are vital for night navigation or heavy fog. A Quick Warning on "Cracks" It is highly recommended to avoid "cracks" or "upd" patches for navigation software like TIMEZERO for several reasons: Reliability: