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LIMIT commands for a variable area criterion.

Question:

Given the following criteria how would I write a limit command to satisfy the
equation ?

An area under each righting arm curve up to the angle of maximum
righting arm of not less than the area determined by the following
equation:  A = 10.3 + 0.187 (30-Y) at max RA.

It takes two consecutive LIMIT commands to handle this criterion:

LIMIT(1) AREA FROM 0 TO MAX AT 15 > 13.1
LIMIT(2) AREA FROM 0 TO MAX AT 30 > 10.3

These are mentioned in the manual under the LIMIT command in the Command
Dictionary.

Syntax Notes:
1) These two limits must be consecutive; e.g. 1 & 2 as above.
2) The /LIMIT:COMBINE subparameter must also be used on any RA command
where the two limits are to be evaluated as a single varying limit.

The interpretation is that the limit value is 13.1 when the angle of MAX is at
15°, 10.3 when   it is at 30° and a linear interpolation between 13.1 and 10.3
when it is between these angles.

Keywords: Offshore Supply Vessel Criterion, IMO A.469 2.5.2
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