Everyone should go back to page one and read what Kolibear wrote.
Anyone who thinks that Nav lights are visiable during daylight hours scares the living hell out of me.
Common sense also dictates that the only way anyone would get injured or killed during engine start up is if they were standing directly in the prop arc.
Common sense dictates that if you confirm no one is standing close to the prop /'s it is safe to start...if someone walks into the prop after engine start then it is only selective selection at work and the gene pool is being corrected.
Chuck E.