Specifies the minimum requirements to allow efficient lashing and securing of semi-trailers, as defined in ISO 3833, on board Ro/Ro ships, indicating in particular the lashing arrangements on the semi-trailer and the securing method to be used. Annex A gives, for information to semi-trailer designers, the securing point arrangements generally used on Ro/Ro ships, annex B describes for information some design indications to decrease damage during handling.