To put it simple – modular BCD consists of  universal, exchangeable components. User can replace or add any piece without having to buy entirely new BCD.

In other words: you decide what kind of configuration to use at the moment. 


At the beginning of our adventure with scuba diving – it is sufficient to have a BC which simply works. If the BC is able to manage the buoyancy somehow – it is ok. However, most of us, divers, are the physical evidence of the rule : “the more you have – the more you want” :-). It obviously applies to various aspects of diving (courses, dive travels, equipment etc.). As a consequence we often need to make massive changes in our equipment configuration.

The modular system is bought only once and do not need to be completely replaced later on.


No matter if you are going to dive on a shallow reef or in the deepest cave – you can use a backplate and harness as a base of the whole setup.

Switching from the recreational configuration (single tank) to the technical one (twinset + stage tanks) will require only few simple adjustments. Therefore you don’t need  to replace the whole BCD.

The difference between REC and TEC configuration is only the wing.

The basic (and in many cases the only) exchangeable piece of our setup will be your buoyancy compensator (the wing). The rest of accessories remains the same !

Thus, the modular system will grow with you throughout your adventure with diving. In other words it will stay in the form that you want it to be – on the recreational, technical or professional (instructor) level.

By using the equipment you know nothing will unnecessarily surprise you.
As a result, you will be fully focused on diving and/or your diving classes content. Moreover, you will be sure that everything is where it needs to be (no matter the type of dive you do).  Your dives will automatically become easier, safer and more fun.


First of all, it will be best to talk with a professional!

Feel free to contact your local Tecline Equipment Advisors 

…they will help you to choose an ideal option – adapted to your personal needs and plans. 

For more advanced users we recommend to experiment with new configurations – under a direct supervision of an instructor.

The basic components that you need to build your own setup are: 

Dive backplate is the foundation – we will build the rest of our modular BCD on top of it. Depending on your needs, backplates can be made of different materials. 

The full range of all TecLine Backplates is available in our catalog

Our harness will let us carry the equipment on our back and stabilise it underwater. Metal D-Rings help to stow all accessories such as SMBs, backup lights, photo cameras etc. 

You can find the full range of TecLine Harnesses in our catalog. 

Depending on the amount of gas and gear that we need to take with under water – we will need different amount of gas to manage our buoyancy.

This is the function of a buoyancy compensator – th wing.

The ful range of TecLine Wings is available in our catalog. 

There are also several accessories which can help to fine-tune each configuration:

  • single-tank adapters
  • tank bands for single tanks
  • weight pockets
  • trim pockets
  • backplate softpad protections
  • and many others

The full range of TecLine Accessories is available in our catalog. 

on the market you can also find many ready-to-use sets. Despite the fact that they are pre-assembled, they still remain fully modular – in case of a need of any further modification – there is no contradiction to play with those configurations 🙂 

The full range of TecLine BCD Sets is available in our  catalog. 

Article by:
Wojtek Filip & BarTek Trzcinski