Systems and methods are disclosed for securing a programmable integrated circuit device against an over-voltage attack. The device preferably has a data processor equipped with a utilization monitor. The back portion is configured to extend along a snorkeler’s back when the vest is worn and includes at least one layer of floatation material. Exposure is performed on at least two regions of the photoresist layer by at least two binary half-tone masks, respectively, in which a first and second binary half-tone masks of the two binary half-tone masks have different optical transparency distributions. Data included in a reference copy may be stored in native format and be accessible through the application associated with the data. This allows for a new, mechanized, time-released method of feeding hayforage to horses and animals giving a more natural feeding alternative.