Isolated grave could be a single burying in a German Graveyard. Sometimes there were special graveyards where all the killed flyers were buried. In Munich its usually Fürstenfeldbruck or Hochmutting near Schleißheim. If there is a single grave the IDPF speaks of isolated grave. I have problems reading the MACR. Technical problems. I'll be back this evening. Have to leave now, If there is any hint where the isolated grave was?