Four o'clock
The voice of the ranger in the _ Arrow _ came softly through the open intercom into the tiny control room of the _ Hound _ . A woman 's voice , tense with excitement , but disciplined and controlled . `` Range five hundred miles , four seventy five , four fifty -- '' And then Merril 's voice , calm and reassuring , giving heart to all the untried ones aboard with his steady conning commands . `` Four o'clock jet , easy , hold her . Drivers up one half standard . Steady goes . Meet her .