A video I saw included one of the pax repeatedly tapping the pilot on the arm/shoulder, apparently to alert the pilot of the proximity of the other helicopter. Did I misinterpret what I saw?
(The reason the avionics fit will be very interesting is if one or both of the helicopters had ASD-B IN with traffic alerting capability and, if it/they were, whether it was operational and, if not, why not. Remember: ADS-B IN is being advertised as something to assist VFR aircraft to avoid collisions.)