Self-catered cabin bookings include basics for all breakfasts and all lunches, but as a host is not included in this cabin type, you and your fellow crew members will have to prepare it yourself. You will be assigned to a standard monohull of 45-50ft.
Fully-catered cabin bookings include all breakfasts, all lunches and two dinners, which are all freshly prepared and served on board by your host. You will be assigned to a premium monohull of 47-53ft.
See here for more details.