Super Yacht Sub 3 from U-Boat Worx submersible

The Super Yacht Sub 3 from U-Boat Worx (a Dutch company whose previous clients include the rich and famous, not excluding Russian President Vladimir Putin).

As its name suggests, this three-seater is intended to fit on the side of your luxury yacht, giving you and your guests the chance to set off on an underwater adventure at a moment's notice.

So what can you expect when you hand over your €1,750,000 (around £1.4m)?

The sub can drop to a depth of either 100m (330 feet) or 300m (1,000 feet) depending on which model you opt for, and is fitted with six powerful thrusters to help you take on the strongest of ocean currents.

Inside the pod are all the trimmings you would expect, including leather seats and air conditioning, so you can travel in comfort.

One of the most important points to note about the Super Yacht Sub 3 is its compact size (171cm or 5'7' in height) and lightness (3,500kg or 3.4 tons), that gives it plenty of flexibility when it comes to transportation and storage.

Thanks to the 42kWh lithium-ion battery fitted on-board the Super Yacht Sub 3 you can keep going for around 12 hours on a single charge (so you'll need to turn around after about 6).

Also of interest is the 'Manta controller' system that allows you and your guests to take it in turns piloting the sub.

This is another recent innovation we're starting to see in the field of personal submarines: the simplification of the control systems so that anyone can take the wheel with very little self-training.

As you may or may not know, depending on whether you own a luxury yacht, storing and launching your personal sub can be a tricky business.

With this in mind, the Super Yacht 3 has been built to be as versatile as possible in terms of how it can be lowered into the ocean and the types of cranes it's designed to work with, according to the Dutch manufacturer, it can be easily adapted to fit any kind of crane configuration.

'With its flexible lifting arrangement, ultra-small size and ultra-low weight, this submersible is ready to come aboard to add a new dimension to your seafaring,' says U-Boat Worx on the sub's promotional material.

You're probably wondering about safety features too: the Super Yacht Sub 3 is fitted with a safety buoy (for getting back up to the surface), a drop weight (for anchoring the craft) and 96 hours of life support, so if you get stranded you can look after yourself for four days before you need to start getting worried.

The submarine has also been given a DNV-GL classification, that means that the powers-that-be in the maritime industry have officially recognised the Super Yacht Sub 3 as something that's sea-worthy and safe to take out into the ocean.

The craft can be set to autopilot for 8 or 16 hours depending on which model you choose. The hull itself is built from acrylic and steel and access is via a top hatch above the vessel (there's also a side hatch for maintenance use).

Should you want to get in touch with those back on the yacht or on land, there's a VHF handheld unit fitted for that very purpose, while navigation is taken care of with an echosounder and a magnetic compass on board.

If you fancy saving up £1.4m to make a Super Yacht Sub 3 your own, the new luxury submarines are expected to be finished in September 2015, giving you some time to put aside a little every month.

The Super Yacht Sub 3 is small enough to fit inside a shipping container, which again makes transportation much more straightforward once you've put your order in.

U-Boat Worx has a good track record with its previous underwater vessels, which include the C-Explorer 5 being piloted by Vladimir Putin.