chapter INTRODUCTION -- part 1 IN THE BEGINNING WAS AN IDEA -- chapter 2 THE ORIGINATORS -- chapter 3 AN IRRESOLUTE BEGINNING -- part 4 THE INCORPORATION OF GEMA -- chapter 5 THE FIRST UNDERWATER SOUND AND RADAR EQUIPMENT -- chapter 6 DETE- AND S-EQUIPMENT -- chapter 7 FIRST SURPRISES -- chapter 8 DROP THE MAGNETRON, PICK UP THE TRIODE -- chapter 9 A RADAR SUCCESS WITH AIRCRAFT -- chapter 10 THINGS MOVE FORWARD -- chapter 11 YEAR OF DECISIONS -- chapter 12 THE BEGINNING OF PRODUCTION -- chapter 13 THE TIME JUST BEFORE THE WAR -- chapter 14 GEMA IS BOUND TO ARMAMENTS -- chapter 15 WAR DOES NOT STOP RESEARCH -- chapter 16 HARD BUT SUCCESSFUL YEARS -- chapter 17 TURBULENT TIMES -- chapter 18 ON THE WAY TO POWERFUL RADAR AND SONAR -- chapter 19 INTENSIFICATION TO THE LIMIT -- chapter 20 GEMA’S CONSTRAINED ENDING -- chapter 21 TRANSLATOR’S EPILOGUE.