Seafaring sojourners can now book reservations for the once-in-a-lifetime World Cruise 2017 tour, a 116-day ocean voyage that highlights 62 destinations in 25 countries. Orchestrated by Silversea Cruises aboard its luxury ship Silver Whisper, the cruise departs from San Francisco Bay on January 6, 2017. The lineup includes overnight stays in historic locales, gorgeous panoramas of tropical vistas, and breathtaking views of ancient citadels. The cruise will accept only 382 guests, ensuring passengers can mingle…