The SEPLA (Suction Embedded Plate Anchor) is ideal for use in deep water oil and gas exploration. In this paper, transparent soil tests in centrifuge and numerical analysis using large deformation RITSS approach were conducted to study inlined pullout of plate anchors. The loss in anchor embedment during keying can be quantified by inspecting anchor movement in transparent soil or numerical study. This study is to correlate the actual anchor movement observed to that estimated using the chain displacement measured during anchor keying under inclined pullout.