header length field

variable field length

fixed length field

facility length field

variable-length field

head length

(II) that does not permit a misalignment of the visually defined field with the X-ray field along either the length or width of the X-ray field to exceed two per cent of the target to fluorescent screen distance, and

(2) Originally, Directive 94/25/EC covered only recreational craft of a minimum hull length of 2,5 m and a maximum length of 24 m. Directive 2003/44/EC of the Council and the European Parliament of 16 June 2003 amending Directive 94/25/EC extended the scope of Directive 94/25/EC to include personal watercraft, and integrated environmental protection requirements into the amended Directive by adopting exhaust emission limits (CO, HC, NOx and particulates) and noise limits levels for propulsion engines, for both compression-ignition engines and spark-ignition engines.

High AL (Table B2) are derived from the health effects ELV for internal electric field related to electric stimulation of peripheral and autonomous nerve tissues in head and trunk (Table A2).Compliance with the high AL ensures that health effects ELV are not exceeded, but the effects related to retinal phosphenes and minor transient changes in brain activity are possible, if the exposure of the head exceeds the low AL for exposures up to 400 Hz.

(c) ‘direct effect’: effect on the human body directly provoked by the presence of a strong magnetic or electric field, for example the stimulation of muscles, nerves or sensitory organs, tissue heating, vertigo or headaches;