Baltic Deco Planner Frequently Asked Question

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What tables/algorithm does Baltic use ?

Baltic implements VPM/B and ZHL16B with Gradient Factors, it is not based on table look-ups.

What ZHL16 values are used ?

The halftimes used (0.9 and upwards) are ;

• N₂: 4, 8, 12.5, 18.5, 27, 38.3, 54.3, 77, 109, 146, 187, 239, 305, 390, 498, 635
• He: 1.88, 3.02, 4.72, 6.99, 10.21, 14.48, 20.53, 29.11, 41.20, 55.19, 70.69, 90.34, 115.29, 147.42, 188.24, 240.03

For ZHL16, the a and b coeffecients are the B values.

Where did the algorithm implementations come from ?

Both were implemented for another project in 2007 and 2008 respectively. The ZHL16 implementation is based on available litterature, such as Dr. Bühlmann's Tauchmedizin, and Dr. Wienke's "Technical Diving in Depth".

The VPM/B implementation is a reimplementation of Erik C. Baker's reference fortran implementation.