This International Standard specifies a method andThe device for use in determingThe position of the seat index point(SIP) for any kind of seat designed for earth-moving machinery as defined in ISO 6165,and tractors and forestry as defined in ISO 3339-0.
EN ISO 5353:1998 history
1998EN ISO 5353:1998 Earth-moving machinery, and tractors and machinery for agriculture and forestry - Seat index point (ISO 5353:1995)