River 460 - Category of Design

River 460 – Owner’s manual
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Rotostøp AS, Østkilen 10, 1621 Gressvik, Norway – post@rotostop.no
2 Category of design
Following the European Recreational Craft Directive (2013/53/EU) each boat has to be classified
according to a category of design.
Your River 460 has been assessed to design category C (former „Inshore“) and design category D
(former „protected waters“).
The design category C is described as follows:
„A watercraft given design category C is considered to be designed for wind force up to, and including,
6 (Beaufort scale) and significant wave height up to, and including, 4 m.”
The design category D is described as follows:
„A watercraft given design category D is considered to be designed for wind force up to, and
including, 4 (Beaufort scale) and significant wave height up to, and including, 0,3 m, with occasional
waves of 0,5 m maximum height.”
Remark:
The significant wave height is the average height of the highest third of the waves, which
approximately coincides with the estimated by an experienced observer wave height. Some waves
reach twice the height.
Craft in each category must be designed and constructed to withstand these parameters in respect of
stability, buoyancy, and other relevant essential requirements listed in Annex I, and to have good
maneuverability and handling characteristics.