This is a commemorative cover that was carried aboard the Boy Scouts entry "SA-29 Active" in the South Africa 1971 Cape to Rio Ocean Yacht Race.  It is understood this was the first ever participation by the Scout Movement in an international ocean yacht race.  The cover was signed by all members of the Sea Scout crew.  Only 50 covers were prepared of which half were offered to the public and another five auctioned for Scout funds.