ISO 11591:2020 pdf download Small craft — Field of vision from the steering position
5 Additional requirements for human-powered craft
5.1 General requirements If the operator of a human-powered craft kneels, sits or stands with his back to the course, it shall be ensured that the superstructure of the craft gives the operator enough room to turn around frequently into the direction of travel to comply with this document (see Clause 4).
6 Additional requirements for power-driven craft with steering wheel or equivalent? fixed? installed? direction? control 6.1 General requirements A forward field of vision shall be provided directly in front of the operator’s eye position throughout the vertical field of vision and extending to at least 15° on either side of a line forward from the eye position (see Figure 1) to the obstructed vision distance as specified in 4.2.2. This may be achieved with normal movement of the operator’s head while maintaining control of the craft.
6.1.1 The requirements for low eye position can be met by an operator’s seat with vertical height adjustment.
6.1.2 From the designated main steering position, standing or seated, the minimum vertical field of vision shall extend from the horizontal with respect to the relevant high eye position to the unobstructed line of vision from the relevant low eye position (see Figures 2 and 3), while ensuring the horizontal arc of vision specified in 4.2.1.
7 Additional requirements for sailing craft under sail or auxiliary power
7.1 General requirements Fixed obstructions to vision shall be such that the field of vision requirements as defined in Clause 4 during normal conditions of use can be maintained with normal movement of the operator in the main steering position.
7.2 Sails Sails or parts thereof may be transparent in order to comply with Clause 4.
7.3 Steering means Sailing craft shall be able to be steered by one or more wheels, tillers, or other steering means. Tillers may have one or more articulating extensions.
8 Owner’s manual
8.1 Human-powered craft
The owner’s manual shall be in accordance with ISO 10240:2019 and shall include the following information.
a) Operator vision from the steering location might be obstructed due to one or more of the following variable conditions:
1) loading and load distribution;
2) speed;
3) sea conditions;
4) reduced visibility (i.e. from rain, darkness and fog);
5) persons or movable gear in the operator’s field of vision.
b) For craft with more than one steering location, those steering locations that do not meet the field of vision requirements shall display the following warning label where it can be seen by the operator:
WARNING —Vision from this steering location is limited. Maintain a lookout as required.
c) For craft with more than one steering location, the main steering position shall be specified.
d) For craft where the operator kneels, sits or stands with his back to the craft’s course, the following warning label shall be displayed where it can be seen by the operator:
WARNING — Vision from this steering location is limited. Maintain a lookout as required.
8.2 Power-driven craft
The owner’s manual shall be in accordance with ISO 10240:2019 and shall include the following information.
a) Operator vision from the steering location might be obstructed by high trim angles of the craft and ue to other factors caused by one or more of the following variable conditions:
1) propulsion unit trim angles (on craft equipped with a power trim system on the propulsion unit);
2) hull trim plane angles (on craft equipped with power operated trim planes or trim tabs on the transom);
3) loading and load distribution;
4) speed;
5) rapid acceleration;
6) transition from displacement to planing mode;
7) sea conditions;
8) reduced visibility (i.e. from rain, darkness and fog);
9) interior lights;
10) position of tops and curtains;
11) persons or movable gear in the operator’s field of vision.ISO 11591:2020 pdf download