Without any form of dip compensation the compass will suffer the full effects of the dipped lines of magnetic force. This will reduce the accuracy of the compass and further reduce the range of latitudes throughout which the compass would be usable.
Adding the pendulous suspension system will reduce the dipping effect thereby improving both accuracy and usable range of latitudes. But because the dipping is not completely eliminated, the pendulous suspension system introduces the turning and acceleration errors.
Adding a balance weight which is appropriate for a given latitude will eliminate the dipping completely, provided the aircraft remains at the latitude. This will also further reduce the acceleration and turning errors. If the aircraft is moved from that latitude some (reduced) degree of dipping will occur and this in turn will increase the acceleration and turning errors.
So it could be argued that by adding pendulous suspension and balance weights, the compass will achieve the best compromise between accuracy, usable latitude range, acceleration errors and turning errors.
Last edited by keith williams; 4th Feb 2017 at 17:28.