Coming in on a cruise ship and I wonder if we would make your departure time of 8:20. We won’t be first off and arrive at 7 am.
You need to contact the company by email. Just google the name and you will find a link to them. I was just a passenger so can only tell you a limited amount of information.
Get an answer from Calypso Outer Great Barrier Reef Cruise from Port Douglas staff and past guests.