Skyhawk 172/Cutlass 172
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Commercial
Flight Crew Last 90 Days 15; Flight Crew Total 350; Flight Crew Type 180
Situational Awareness
Conflict NMAC
Flight Crew Executed Go Around / Missed Approach; Flight Crew Took Evasive Action
Human Factors
Arriving in the Deland (DED) airspace; a radio call was made 5 miles out and entering the upwind leg for a left pattern for runway 5.  A downwind leg call was then made.  3 aircraft are in the pattern and can be heard over the radio and seen by both pilot (I) and passenger. One aircraft was departing to enter the pattern behind us.  One aircraft was in front of us by about 1 mile.  These 2 aircraft were making appropriate radio calls as was I for every leg of the traffic pattern (downwind; base; final).  On short final at approximately 100 feet directly over the airport fence; a Cessna appeared approximately 10 feet below us.  An immediate go around was executed.  After reentering the pattern; we landed with no further incident. The Cessna had made no radio calls and was not visible to anybody else in the traffic pattern upon further questioning.  Later questioning also determined the Cessna was a training flight that had just departed Ormond Beach (OMN).  The lack of lighting and lack of radio usage by a student and flight instructor caused a near collision.  Usage of a radio is a crucial component to safety at uncontrolled airports.
C172 pilot reported an NMAC with another light aircraft in the pattern at DED. Reporter stated lack of adherence to radio procedures was a major factor in the incident.