Simple Script for Dive Calculation

dive.js

// Namespace to DevelopLive
DevelopLive = window.DevelopLive || {};

// Define Dive
DevelopLive.Dive = window.DevelopLive.Dive || {};

(function () {
    $self = DevelopLive.Dive;

    $self.calcSac = function(psiIn, psiOut, time, 
        depth, tankVolume, tankWorkingPsi) {

        // calculate DAC
        var dac = (psiIn - psiOut) / time,
            // calculate SAC
            sac = dac / ((depth / 33) + 1),
            // calculate RMV
            rmv = sac * tankVolume / tankWorkingPsi;

        // return
        return rmv;
    }
}());