_this select 0: SCALAR - Maximum distance to choose point
_this select 1: SCALAR - Minimum distance to choose point
_this select 2: SCALAR - Spread of arc in degrees relative to _unitIn. Is randomised to add fuzziness to final location.
_this select 3: OBJECT - Unit, player, vehicle etc.
_this select 4: SCALAR - Offset initial angle, allows to pick position to the side of _unitIn with -90 or 90.
_this select 5: OBJECT - Target to use for relative position from _unitIn. Allows to pick a position left of _trgtin for example. [optional: default false]