As Cookson said, they had to get on the island using the locals' longboats. It takes quite a while to travel from the island to the ship and it would take some time just loading & unloading the longboats. The Navigator must not have had many guests or only a select few made the journey to shore. How would the Marina choose which guests would get the opportunity and what kind of rebellion would there be amongst the unchosen?
Jim

[Linked Image]
It's not easy getting off the longboat

[Linked Image]
The longboats have to get into and out of this small cove, usually under rough sea conditions.

[Linked Image]
Here's a longboat heading back into Bounty Bay

[Linked Image]
Here are a couple of pirates with us.