DIVING ASSISTANT 1.0  - Properties

  1. Main functionality:
    • Type of dives
      + multiple diving, multi-day diving
      The program allows to plan multi-day dives. The system will check that you have maintained the basic safety rules for such dives.
      + multi-level diving
      You can prepare plan of multi-level diving. Program allows you to enter any number of depth segments.
      + altitude diving
      Application allows you to plan diving on higher altitude. For your convenience, we have provided an easy to use conversion mechanism (atmospheric pressure to alitutude and vice versa) in range from 0 to 3000m / 9800ft. We use near-real models: ISA (International Standard Atmosphere) and NOAA (National Oceanic and Atmospheric Administration ).
    • Decompression and stops
      + calculation of decompression stops
      Deco stops are calculated according to the basic algorithm ZH-L16, with the possibility to choose one of the variants and dive site paramters. Model takes into account 16 or 17 teoretical tissues and multiple inert gases.
      + calculation of time and depth of safety stop
      Depending of dive site and configuration, system automaticaly select recommended depth and time of safety stop.
      + deep stops
      Optionally, you can enable deep stops. You can choose from several well known methods, which can be selected depending on your preferences and recommendations of diving organizations. On time and depth of deeps stops has impacts a number of other parameters i.e. dive site parameters, current tissue saturation. Deep stops afects the calculation of other dive parameters.
    • Control of gas.
      + breathing gas pressure
      Built-in gas pressure control mechanisms verify acceptable operating parameters have not been exceeded. Particular attention should be paid to the minimum and maximum partial pressure of oxygen (PPO2). Maximum pressure is dynamicaly selected based on other dive parameters. We pay attention to the recomendations of NOAA and DAN.
      + gas narcosis verification
      The application has a built-in database to determine a gas narcosis and control the safety limits.
      + oxygen txicity control
      Depending on the duration, depth and type of gas, the oxygen can be toxic for the diver. The system calculate and dynamicaly selects the limits of generally used indicators of toxicity PPO2, OTU and CNS.
    • Personal preferences
      + personal limits
      The application allows to setup your personal limits i.e. maximum depth with accordance to your diving certificate or maximum single dive time. This allows for better matching profiles to individual needs.
      + variants, conservatism
      According to your preferences you can set the application mode and a variant of the algorithm. Novice divers can choose more conserative settings. Advanced divers - settings more aggressive.
      + breathing set
      In order to plan the dive, must be taken into account breathing set parameters. This element is often forgotten. The application allows you to select one of several predefined sets.
      + breathing gas reserve (spare)
      Depending on the type of diving, the application enables you to adjust the size of the reserve of breathing gas. This is one of most important safety rules. Spare of air should be selected depending on the complexity of each dive.
  1. Advanced functions:
    • Presentation of the profile
      + profile chart
      The program has a built-in mechanism for the rapid presentation of the dive profile in form of a simple graph. Profile graph (chart) is available on the planning form and also for printing.
      + advanced charts
      You can view a number of advanced charts. They allow you to visualize such gas saturation of individual tissues during the dive.
      + review of detailed data
      During dive planning, the system displays a simplified typical dive plan. On a separate tab we have provided view of details. It allows you to track profile of the dive with high accuracy. You can check, for example, partial pressure, oxygen saturation, no-decompression time, GF ratio and more.
      + report for printing
      The application has a built-in module to generate reports specifically designed for printing. On request, we provide the description for developers and designers to create their own, modified report.
    • Data saving
      + profile data saving
      All details of calculated profile can be saved to XML file. This file is suitable for late analysis or importing to external tools.
      + profile graph saving
      Just like data, you can also save a chart. Saving is possible to popular image formats: BMP, GIF, JPG, PNG, and TIF. You can send the file by e-mail or print.
      + M-Values saving
      In order to analyze in the external tools, we have provided the ability to save the current table limits so-called M-Values​​. Saving is possible to XML file.
  1. Diving engine - basic properties:
    • Algorithms
      + decompression and stops
      Engine calculates the saturation of the tissues and decompression stops based on the ZH-L16 algorithm, variants ZH-L16A, ZH-L16B, ZH-L16C. Additionally, you can choose between dynamic mode and conservative. Deep stops are possible to calculate according to the methods Pyle, NAUI, SSA and GF.
      + pressure
      Internal engine has built-in dive calculation pressure according to the simple model (linear), NOAA and ISA. By default we use NOAA model. Pressure of the water is calculated linearly according to typical values ​​for fresh and salt water.
      + oxygen toxicity and gas narcosis
      CNS index is calculated on the basis of a set of linear equations and NOAA table limits (1991), based on studies whose authors are Dr. F.K. Butler, Dr. Edward D. Thalmann, Dr. Christian J. Lambertsen, Dr. Russell E. Peterson. OTU index is based on the method developed by the team of Dr. Christian J. Lambertsen. OTU limits are consistent with the development of team of Dr. Bill Hamilton. The maximum gas pressure for different dive parameters are based on the recommendations of NOAA.
    • Scope of calculations.
      + resolution of calculation
      Resolution of computed profile is at least one minute for constant depth and 100cm (variable time) for descent and ascent.
      + scope of calculated parameters
      During generating the correct profile for each step is calculated and stored in the memory a number of parameters. The following are the most important data.
      For each of the tissues are calculated: half time of saturation, parameters for limiting, the exposure time, exposure pressure, current partial pressure, oxygen saturation, pressure tolerance, the rate of GF, GF tolerance. For each set of tissues: the maximum pressure tolerance, the resultant pressure tolerance, current GF, target GF.
      In addition, for each step: the gas pressure, saturation, depth, next deco stop, safety stop, type and parameters of the next deep stop, water type, altitude, type of breathing mixture, a set of breathing, consumption rate, decompression time, the minimum time to flight, target and preferred GF, phase and diving action.
      + warnings
      Engine diving has warnings module that allows you to eliminate the main threats. Generated alerts cover the following areas: maximum depth and dive time, the relative narcosis of gases, oxygen toxicity, the amount of breath, the dives sequence.