Simplicity: The rigging is intentionally nominal, emphasizing ease of use for beginners and versatility for rowing or towing once the sail is down. Needs to be some cross pollution from the very popular Sunfish and Sailfish from that era. I guess that after a few extra queries for instance these https://pingdirapp44.directoryup.com/united-states/fort-myers/top-level-category-1/offshore-sailing-school