Video of the incident captured by local Christie Hutchinson showed the agile crew swimming to the driver and passengers to help them exit the silver Chrysler Town & Country through the front window.
Meanwhile, another pair of men tied a rope to the back of the truck in an attempt to pull it back onto the boat ramp but failed as it quickly sank completely.
According to a Storyful report by Hutchinson, the crew of the sailboat Nanea saw the car crash into the port next to them as they were returning from a day of sailing.
The passengers were tourists finding a Manta Ray Snorkel tour company in the harbor Hutchinson said. They followed GPS directions and mistakenly turned into the water.
Viewers of the humorous clip pointed out that "The Office" characters Michael Scott (Steve Carell) and Dwight Schluter (Ryann W. Wilson) found themselves in a similar predicament.
A fan wrote, "I've just completed viewing this episode of The Office."
For many others, the unbelievable events and subsequent reports left a pressing question: How did this happen?
"An expensive vacation," quipped one savvy traveler. One would hope they purchase additional insurance for their rental vehicles.
Watching the video below: