The cruise industry is an ideal crucible for enterprise applications of data science and machine learning. Its ships are veritable mobile cities on the water, powered by full-blown industrial operations. Pricing and revenue management are driven by complex stochastic optimizations, demand forecasting, and price-response predictions. Marketing & eCommerce activities target guests globally with mixes of message, promotions and recommendations. And a portfolio of hotels and global supply chain must be managed to provide millions of guests all that they need locally on the ship. This session will cover case studies for how we leverage math and data to make this work, and in particular how we restarted from 18 months of essentially zero data (aka the pandemic).