in "classic" horizontal your dive computer is below your body. It counts worst case, kid of.
If you stay vertical to your limit it can miscalculate NDL, as big part of your body will be below computer reading point.
In theory, at least. It is hard to imagine real issue because of that.
If you stay vertical to your limit it can miscalculate NDL, as big part of your body will be below computer reading point.
In theory, at least. It is hard to imagine real issue because of that.