Good trim is the ability to be neutrally buoyant and maintain a stable, horizontal position buoyancy control.
It is a prerequisite for a number of underwater pursuits, and mastering it may result in experiencing less fatigue, reduce gas consumption, learn new skills more easily, safeguard the environment and benefit from improved confidence and control. We would like to raise awareness about the benefits of good bouyancy through a new, exciting challenge: the MasterTrim contest.We would like to raise awareness about the benefits of good bouyancy through a new, exciting challenge: the MasterTrim contest.
This game is bulit with the support of Green Bubbles Project

Green Bubbles is an EU research project managed by a consortium of nine academic and non-academic entities in six countries (Italy, The Netherlands, Malta, Turkey, South Africa, USA). These bring expertise from disciplines including social science, environmental science, IT and computer science, medicine and engineering. Launched in 2015 and with a four-year lifespan, Green Bubbles aims to maximise the benefits associated with SCUBA diving, whilst also minimising its negative impacts. The ultimate goal is to promote the sustainability of the scuba diving industry.
The ultimate outcome of the project is expected to be the development and implementation of a new and holistic quality label for sustainable diving operations.
Green Bubbles has received funding from the EU's H2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement N° 643712.