On trailer by land or with sea transport on a ship.
When looking into how do you transport a large yacht, there are two main forms of boat and yacht transport. Local moves usually just entail trailering the boat or yacht on its own trailer if applicable. For long moves, yachts are placed on flatbed trailers with the assistance of a crane.
The second option is called sea transport. Sea transport entails having the yacht transported by sea by one of two methods. The first option is using a professional ship captain to physically drive the yacht to its new destination. The second option involves placing the yacht on a bigger ship that then transports the yacht across long distances by sea.
As a tip, contract with a licensed and insured boat transport company that knows how do you transport a large yacht.