Magnetic Compass Question...

[MarineGrunt]

According to the Jeppesen Private Pilot Manual, the magnetic compass has the magnet on the "south side" of the float. This was their explaination of what lead to Acceleration/Deceleration error.

In Deremer's book, Aircraft Systems for Pilots, he describes the mag compass as having two magnets, one at the 360 mark and one at the 180 mark. Would this offset the effect of acceleration error? (other than the effects related to magnetic dip)

Does one of these books describe it wrong? Are there two types of Mag Compasses out there?

 

[nosehair]

Instrument Flying Handbook FAA-H-8083-15, page 3-9, "An aircraft magnetic compass has two small magnets attached to a metal float..."
Page 3-12 describes "Dip Error" and explains that a small dip-compensating weight is placed on the float to keep it level at the mid-northern lattitudes (the USA). This small weight is placed on the south end, and, page 3-13 explains how this heavy end rotates due to inertia during acelleration/deceleration.