`46 CFR 171.080 (f) (6) (iii) requires the area between equilibrium and
`downflooding or the second intercept to be > 0.0025 (equ - 1) m-rad.
`This variable area requirement can be calculated and used in the limit
`definition.  Since the limit is static after the limit command has been
`issued, it must be updated by the MXmacro for maximum VCG calculations.

`The following run demonstrates how this can be done.
`Download GF from: 171080F6.zip

read 171080f6.gf
report /nograph

crtpt = "Downflooding point" 70, 15, 15
hmmt 2000
type (cmpt1.s,cmpt2.s) = flood

variable A,H  `temporary variable used by Macro lim

macro lim
 limit (1) angle at EQU < 15              `f6iii
 limit (2) angle from EQU to RA0 > 20     `f6iiiA
 variable A,H
 set H = ABS {HEEL} minus 1
 set A = {H} times 0.0025                     `(area units in m-rad)
 if {A}<0.004 then set A=0.004                `minumum required area for this limit
 limit (3) area from EQU to RA0 or FLD > {A}  `6fiiiB
/

angles 0 2
.lim
MAXVCG 6,8,10 /trim:0/MXMACRO:LIM

MAXVCG 6,8,10 /trim:0/MXMACRO:LIM /TOL:0.002

print preview
report off