... for hands-off operation4) Variety of display modes: A-scope, bottom-lock expansion, marker zoom and unique ... selectable from blue, light blue, white and black.(3) Basic RangeMeters: 5/10/20/40/80/ ... 150fathoms, 200 passi/braza)(5) Zoom RangeTimes 2, 3, 4 and 5 ranges(6) Bottom Lock Expansion ... alternately transmitted), 300W(12) Pulse-length/TX rateDisplay End Depth(m) 5, 10, 20, 40, 80, 150, 300Pulse ...