MAJOR CRUISE LINES

Royal Caribbean: Three-star Florida-based operator with huge ships. royalcaribbean.com

Celebrity Cruises: Four-star sister brand of Royal Caribbean. celebritycruises.com Crystal Cruises: Luxurious, offering both deepsea and river cruising. crystalcruises.com MSC Cruises: Four-star product. msccruises.com

Princess Cruises: American outpost of P&O (same owners). princess.com Norwegian Cruise Line: Competes with Princess and Celebrity. ncl.com Oceania: A foodie’s cruise line. oceaniacruises.com

Silversea: Quality product inclusive of alcohol silversea.com