Q would have been proud - 30 years after James Bond disappeared under the waves in a specially adapted Lotus, car designers have done it for real.
Cinema audiences gasped as Roger Moore's 007 took his white Lotus Esprit for a surprise dip to evade the enemy in the film The Spy Who Loved Me.
The "sQuba" will be exhibited at the Geneva Motor Show next month.
These pictures show the €1 million (£750,000) prototype, which can dive to a depth of 10m, in action off the coast of Florida.
The team at his firm Rinspeed replaced the petrol engine with three electric motors, one to power the rear wheels and two for the specially designed propellers.
They are capable of taking it to 75mph on land, a more sedate 4mph while cruising in "boat" mode and a positively tranquil 2mph while underwater.
The company also claims that the car is extremely "green" as well, as it is a zero-emission vehicle powered by rechargeable lithium-ion batteries.