MV-Plan uses the Buhlmann ZHL-16B and ZHL-16C decompression models with m-value gradient factors for extra conservatism.
Gradient factors are a mechanism to introduce conservatism on top of the Buhlmann model. Essentially they represent a percentage of allowable over pressurisation of the theoretical tissue compartment(s). So a GF of 100% means standard Buhlmann, a GF of 0% means that no compartment is allowed to go above ambient pressure (not very practical). The methodology proposed by Eric Baker proposes a starting gradient factor to be applied to the first deco stop, and an ending gradient factor to be applied to the final stop, with a sliding scale in between. Typical values are 30-80, meaning the first stop is 30% of maximum overpressure, the last stop is 80% overpressure, thus implementing an initial "deep stop" and a measure of conservatism for the last stop. MV-Plan limits the GF to 90% because Buhlmann never intended divers to use 100% of his maximum over pressure as it represents the point where 5% of divers get the bends. Further information can be found here
MV-Plan is limited to:
These limits are imposed because of basic common sense - i.e. the validity of the model is questionable beyond this range. If this presents a problem to you and you wish to experiment with plans outside of this range please email me.
MV-Plan supports 6 languages: English, French, German, Spanish, Italian and Polish. If you would like to help add your language please contact us.
Yes. MV-Plan 2.0 fully supports CCR diving with configurable setpoints, multiple diluents, and complete bailout planning with stress gas consumption calculations.
MV-Plan 2.0 is available on:
No. MV-Plan does not collect any personal data, does not require an account, and does not include ads. All dive plans are stored locally on your device.
MV-Plan was written as a personal project so that I could experiment with m-value gradient factors. A commercial version of MV-Plan implies a level of support and warranty that I am not able to give. Hence the best solution is to make MV-Plan available free to the diving community.
Yes. The source code for MV-Plan is available under the AGPL-3.0 license. You are encouraged to look at the source code and re-use it for your own projects. If you are interested in contributing to the on-going development of MV-Plan then please contact us.