On July 30 , 1998 , a Beechcraft 1900D , operating as Proteus Airlines Flight 706 from Lyon to Lorient in Brittany , was hit by a privately-owned Cessna 177RG over Quiberon Bay , killing all 15 people on board both aircraft . The biggest contributing factor to the accident was the crew of the 1900D electing to take a detour to fly around the SS '' Norway '' . While finishing the sightseeing pass over the ship and shifting their attention to landing preparations , the crew did not use the '' see and avoid '' concept that was part of the visual flight rules they were operating under . As well , the pilot of the Cessna had failed to turn on his plane 's transponder , effectively making the aircraft invisible to radar systems on the ground
Proteus Airlines Flight 706
Proteus Airlines Flight 706
Proteus Airlines