1.57 FFE LOS HINDRANCE: A HE Concentration (1.7) FFE of ≥ 70mm is considered a two level +1 LOS Hindrance to any LOS traced into, through, within, or from its Blast Area hex(es). This Hindrance DRM never exceeds +1 per FFE, regardless of the number of HE Blast hexes of that concentration it is traced through. For Barrage, see E12.52 and E12.75. See also F11.75