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These and other boat styles are welcome in Marathon races.
OMCKRA maintains a standard specifications policy to promote fairness in the sport. Boat styles/types may be grouped into one class. For example, depending on measurements, the ICF K1 is grouped with some Surfski into the HPK (high performance kayak) class.
Want to learn more about boat Specifications?
See OMCKRA's policy on boat specifications, safety and other documents in our 'documents' page.