Historical
ISO 11591:2011
Small craft, engine-driven - Field of vision from helm position
ISO 11591:2011 specifies requirements for the field of vision from the helm position, forward and astern, in engine-driven small craft of up to 24 m length of hull.
It is not applicable to tiller-steered craft with maximum speed less than 10 knots or sailing craft.
International Organization for Standardization [iso]