I don't know that distance alone is the biggest concern for the boat, but rather the waters that it must ply are the consideration. To go to Catalinita and then to Saona meant that we went into the channel to Catalinita and then had to come back from whence we came and then all the way around the western coast of Saona, past Mano Juan on the south and then further east to Canton de la Playa. It was planned such that we made stops at the Piscina Natural and Mano Juan and even so it was 30 minutes at a stretch in the boat. It was not an option to circumnavigate the east coast of Saona because of the unforgiving waters of Mona Passage. Or so I was told...
It's a 90 minute ride from Saona to Bayahibe by catamaran and I know that some of the stretches of that duration are uncomfortable for some people. I have salt water running in my veins so I don't really understand it, but I've heard it a number of times!
Kaki