`Changing units several times in a run file may become confusing. The example
`below shows one method of having GHS remember which units were used originally
`and resetting them when needed.


READ FV.GF
REPORT CHUNITS.PF
DRAFT 5
VCG 7
SOLVE WEIGHT, LCG

CRIT "AIR VENT" 25,2,6 /FLD

VARIABLE (STRING) SAVEUNIT
SET SAVEUNIT="{WUNIT}"

UNITS MT
LIMIT RA AT MAX TO FLD > 0.1 `meters

UNITS LT
LIMIT AREA FROM EQU TO RA0 OR FLD > 2.82 `feet
UNITS {SAVEUNIT}

RA /LIM:ATTN
REPORT OFF