This paper presents a semi-analytical approximation for a two-dimensional (2D) tension
analysis of submarine cables during laying operations. In the analysis, based on geometric
compatibility relations and equilibrium equations, a set of non-linear differential equations are
obtained. The present model considers effects of ocean currents, cable ship motion, pay-out rate,
water depth and material properties on submarine cable behavior in water, which are crucial
during laying operations. As shown in numerical examples, with consideration of currents and
cable ship motion, the cable tension appears to be smaller and cable configuration curve tends
to be fatter than the conventional catenary theory.