This series is created to meet the demands from Boy Scouts/youth organizations, hikers to use on shorter day trips and schools. Patented red/black north/south lines in the capsule (Field 7 and 26) and a north indicator on the compass needle are standard on the Field series. Probably the world's best selling compass model. The small size and the rounded back of the base plate make this compass an ideal youth/beginners compass for all kinds of navigation on foot. Map measuring scales mm, 1:50k and 1:25k. Declination scale inside the capsule.