Oldest waterskiing instructor

According to Official Guinness Records,

The record for the oldest waterskiing instructor was achieved by Robert Christl (Austria, b. 24 June 1922) a qualified water ski instructor since 1984. As of June 2006 he continues to work at the Wasserschischule Mondsee, Austria.
In summer he works 8-10 hours as water-ski instructor
In winter he works 4 hours as ski instructor.

For a complete list of 2006 records, please visit 2006 Guinness Records in Austria.

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