Small Aircraft; Low Wing; 1 Eng; Retractable Gear
Flight Crew Private
Air Traffic Control Non Radar 40; Air Traffic Control Radar 40; Flight Crew Last 90 Days 15; Flight Crew Total 2950; Flight Crew Type 950
Situational Awareness; Human-Machine Interface; Confusion
Aircraft Equipment Problem Less Severe; Airspace Violation All Types; Deviation / Discrepancy - Procedural FAR
General None Reported / Taken
Aircraft; Human Factors
I flew direct to M25 at 4;500 FT. I was using a Garmin 530 to navigate and to show special airspace to me. I flew through R-3704 A&B; someone who had used the airplane before me had changed the settings so the screen I was using did not show the restricted airspace. Several miles after I passed through the space I was scrolling through a Garmin 430 that showed the restricted space. I then realized the mistake I had made. I then looked at the setting on the [Garmin] 530; and saw that it was set for special airspace on the 50 mile screen and I was flying using the 35 mile screen. On my return trip back to my home airport I flew well south of the restricted space. The purpose of the trip was to fly a friend to get a truck and drive it home. In future I need to do a better job of flight planning.
A pilot flew through R-3704 A & B because the Garmin 530 Special Use Airspace range setting was on the 50 miles scale and he was flying on the 30 mile scale.