Koppel is the managing editor for the Discovery Channel, the largest cable network in the United States. In this role, he hosts Koppel on Discovery, a series of programmes examining major global topics and events.
The Emmy Award-winning journalist spent 42 years at ABC News. From 1980 until 2005, he was the presenter and managing editor of ABC News Nightline, one of the most honoured broadcasts in television history.
During next month's 10-day Silver Whisper voyage, he will present lectures on his career interviewing international newsmakers and covering major world events. Guests are sure to be intrigued by the stories of his life and times.