Silversea Cruises Cancellation Policy

https://www.silversea.com/guest-terms/united-states/united-states-ctc-en/

For current U.S. Classic or Expedition All-Inclusive Plus fares, the deposit is fully refundable at 151+ days before arrangements begin. Penalties are 15% at 150–121 days, 25% at 120–91 days, 50% at 90–61 days, 75% at 60–31 days, and 100% at 30–0 days.