Yes, there is some rolling and pitching of the boat and you may take some time to adjust to it. The catamaran is capable of attaining a maximum cruise speed of 32 nautical miles but goes at a relatively slower speed between 22 and 24 nautical miles for passenger comfort. Several traveller reviews mention that one is likely to experience sea sickness towards the early part of the journey but as the vessel approaches the relatively quieter water near Havelock, the sickness reduces or disappears. Travellers have given mixed reviews of on-board toilet facilities. Do remember, you will not be allowed to stand outside in the open during the journey.