Damn ISM!!! Still think that anything that is used for navigation needs to be type approved like true ECDIS, Radars, etc… as required (for good reason) . When personal computers get relied upon (for nav.), you just don’t know how much the person behind the wheel is relying upon the information (possibly too much)…and you have no control over the equiment or software (other than allowing it or not). I would say <strong>not</strong> 100% of the time. Not, as a commercial mariner anyway. Liability is a funny thing…plus other problems arise…freecell and solitaire are a few.