This novel design of crew transfer boat provides fast and secure passenger transport to offshore installations. She can carry up to 12 passengers as well as a wide variety of payloads. The accommodation is modular and can quickly be removed to provide extra payload area or indeed replaced with alternative modules to provide alternative functionality (typical examples could include dive support, medical facility, workshop, additional berths etc.). This innovative feature helps create an extremely versatile craft that will be able to provide support offshore in a wide variety of roles.