Fast Cat has three major sections in their ferry service that passengers can choose from.
Biyaheroes.com explains the difference among the three and lets you book any of them online and in real time.
Business Class is limited to a 63-person capacity that's fully appointed with an LCD TV, air-conditioning, and windows that expose the view of the ocean.
Premium Economy offers a 105-passenger capacity with air-conditioning, two LCD TVs, and windows that welcome the ocean view.
Economy gives you an open-air seating arrangement that can accommodate 107 passengers. This has the cheapest fare among the three types.