Question:

Why does GHS return a value of "LARGE" for a residual area ratio? What would cause it to do this and is there a way to make it return a number in this instance?

Answer:

It could simply mean that the limit margin or attained value has too many digits to fit in the field in which it is to be displayed. You can determine whether this is the case by trying it with an increased limit value.

In other cases the limit margin evaluations are reported as LARGE in order to avoid extending the righting arm curve to larger heel angles when it is apparent that the limit margin is already very high.