A heading sensor is not required for Quantum 2 but is highly recommended. Adding a heading sensor to the radar allows it to perform better at slower speed (below 15 knots) particularly when tidal set and leeway are present. The presence of the heading sensor also enables target tracking capability using the radar’s MARPA/ARPA system, improves low and zero-speed rendering of radar/chart overlay, and enables a stabilized radar PPI presentation on the chartplotter or MFD (Multi Function Display). The Raymarine EV-1 or EV-2 autopilot sensor cores, or the AR200 augmented reality sensor module are recommended.