The bizarre mishap occurred when the driver blindly followed GPS directions down a boat ramp and into the water.
It is not unusual for a car satellite navigation system to offer questionable directions, but some degree of common sense should always be applied when deciding whether or not to actually follow them.
Common sense, however, seemed to be missing entirely from this particular scenario which saw two tourists drive straight down a boat ramp and into a harbor in Kailua-Kona, Hawaii recently.
A video of the incident shows the hapless duo being rescued by a sailboat crew.
"I was just sitting there trying to seek shelter from the rain, and then the next thing, I saw a car drive directly past our boat straight into the harbor at a pretty decent speed," said local Christie Hutchinson who captured the footage.
"It was so confidently done, they didn't have a look of panic on their face. They were still smiling."
It turned out that the tourists (who happened to be sisters) had been following their GPS to the location of a snorkel tours company when it had instructed them to drive into the ocean.
For reasons known only to them, they happily obeyed and plunged the car into the water.