SR20
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 4; Flight Crew Total 168; Flight Crew Type 168
Situational Awareness
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Executed Go Around / Missed Approach; Flight Crew Took Evasive Action
Human Factors
I was inbound to ZZZ from the southeast at 1;500 feet MSL; making entry for a left-hand downwind for Runway XX. Listening on CTAF; there was a Helicopter flying the practice ILS [Runway] XY into ZZZ; about 5 miles out. There were two aircraft ready to go on Runway XX; a Cirrus Aircraft X and an experimental Aircraft Z. The Helicopter continued to make position reports; e.g. 'ZZZ Traffic; Navy helicopter on 4 mile final; ILS [Runway] XY'The Cirrus started to roll on Runway XX; while the Helicopter was now on about a 0.5 mile final for runway XY. As I overflew the field; I watched as the Helicopter and the Cirrus were on a collision path headed towards the intersection of runways at ZZZ. While the Cirrus was on the roll; he inquired on CTAF if the Helicopter had the Cirrus in sight. The Helicopter said it did and being a helicopter; was able to immediately with a swift pitch up maneuver; reduce airspeed and come to a hover before the runway intersection; thus preventing a collision. The Cirrus continued to take off and fly the upwind leg up and out of the airport. I believe the issue stemmed from the Helicopter making radio calls including IFR terms while the pilot in the Cirrus may have been a VFR only pilot. The inclusion of 'ILS' may have caused confusion with the Cirrus pilot; making them feel that the helicopter was farther away than reality.
Pilot reported a Near Mid Air Collision during final approach.