Triton Submarines and British marque Aston Martin have joined forces to create the ultimate luxury submersible. Project Neptune is a sleek super-sub capable of diving to depths of 500 metres while cossetting passengers in an uber-luxe interior. Weighing 4,200kg and standing just 1.9 metres tall, the submersible is compact enough to squeeze into a tender garage or can easily sit on deck in pride of place. Project Neptune offers a bulbous cabin for panoramic views complemented by a quintessentially Aston Martin interior featuring hand-stitched leather and a carbon fibre trim. While a top speed of five knots might not sound like much – particularly for an Aston Martin – it’s actually four times the acceleration of Triton’s flagship 3300/3 submarine.