: To move them across a chart without slipping, you must "walk" them by firmly anchoring one side while moving the other.
: To keep parallel conductors from touching or vibrating excessively due to wind (aeolian vibration), hardware like spacers is used to maintain uniform geometry. 4. Related Marine/Navigation Note Linhas Paralelas do Condutor
If you are referring to (Parallel Rules) used by a Condutor (Maritime Navigator/Officer), these are tools used for traditional chart work: : To move them across a chart without
: They transfer angles and bearings across a nautical chart to plot a ship's course. Linhas Paralelas do Condutor