Active

Sets the selected hard ground regions active. Only active hard ground regions are included in noise calculations.

Find it here:

MOUS_ICO Menu: Noise > Hard ground regions > Active

or

MOUS_ICO Menu: Noise > Hard ground regions > Dialog box

MOUS_ICO Select one or several hard ground regions in the list

MOUS_ICO Dialog box: Active

or

nco: Select a hard ground region

MOUS_ICO Popup menu: Active

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