Join Date: Oct 2003
Location: Bloomfield Hills, MI, USA
Generally, one is used for 'Housekeeping' IE: total miles, running hours, stopped hours, speedo functions, etc. The second unit is there for primary routing chores. That is why you may see an old SPIII on one side and a 2610, 2720, or Zumo on the other.
The routing is done by the faster unit while the old guy just counts miles and time. There is backup potential there also should one go down during the rally.
J. Averill Townsend
Bloomfield Hills, MI
2002 K1200LTC - Silver
1978 R100/7 - Very, very Black
2004 Bushtec Quantum - Silver, of course...(SOLD)
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