An aldehyde differs from a ketone because of its hydrogen atom attached to its carbonyl group, making aldehydes easier to oxidize. Ketones don't have a hydrogen atom bonded to the carbonyl group, and are more resistant to oxidation.
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The Garmin numap update 010-11269-00 is compatible with the Garmin nuvi 660. http://www.gpscity.com/garmin-numaps-north-america-lifetime-updates.html.It is a card with a special download code on the back. Once the card and your unit are registered you can download the mapping.riginal question asked on May 22, 2010, 3:30am. I understand that Garmin no longer supports the nuvi 660 GPS. Will the nuMaps NA lifetime update service work with the nuvi 660?