Update Discs:
Updated discs are available from Horizon Navigation for $125 each. Improvements in the map database content has required an increase in the amount of CDs needed to cover the US from three discs to nine discs. The latest software release is version 4.7.2, released September 2004. See the Horizon web site for ordering information.
1. California / Nevada, USA (P/N NM20-1100101) CA, NV
2. Pacific NW / Mountain, USA (P/N NM20-1100102) AZ, CO, ID, MT, NM, OR, UT, WA, WY, TX
3. Upper Midwest USA (P/N NM20-1100103) IA, KS, MN, MO, NE, ND, SD, plus parts of IL, MI, WI
4. South Central USA (P/N NM20-1100104) AR, LA, MS, OK, plus parts of TN and TX
5. Great Lakes, USA (P/N NM20-1100105) IL, IN, MI, OH, WI
6. Ohio Valley, USA (P/N NM20-1100106) KY, WV plus parts of IN, MD, NY, OH, PA, TN
7. Northeast USA (P/N NM20-1100107) CT, ME, MA, NH, RI, VT, plus parts of NJ, NY
8. Mid Atlantic, USA (P/N NM20-1100108) DE, VA, DC, plus parts of MD, NJ, NC, PA
9. Southeast USA (P/N NM20-1100109) AL, FL, GA, SC, plus parts of NC