General HydroStatics
Ship Stability Software
Command of the Week
(New or interesting aspects of GHS that you may not know about)

RAH /SIZE

Normally the RAH command scales its plots as large as possible to minimize whitespace. But that means a series of RAHs runs would be plotted at different scales when their maximum righting arms differ significantly... making them difficult to compare at a glance.

This can be fixed using the RAH /SIZE:max parameter by specifying the same maximum (and optionally minimum) righting arm scale values. An even easier way to handle this is to specify /SIZE:* on subsequent RAH runs so the scale sizes from the first RAH plot are reused. For example:

READ LINER14
DR 12 | SO WE LCG | VCG 8
CRT FLOODER 75 14 20
REPORT
RA
RA /GRAPH:ONLY /STOP:FLD /SIZE:*
RA /GRAPH:ONLY /STOP:FLD
REPORT CLOSE /PREV

In this example, the /GRAPH:ONLY parameter omits redundant table output (see COW194) and the /STOP:FLD parameter stops subsequent RAH runs when the downflooding point immerses, preventing plots from reaching their normal maximum righting arm and heel values:


But when /SIZE:* is present, the stopped plot remains nicely scaled the same as the preceding original:



Questions, comments, or requests?
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Port Townsend, WA 98368 USA

www.ghsport.com

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