In this paper, the dynamic response of undersea -+towed systems is num
erically simulated. A two body towed system is especially considered i
n detail. The factors influencing the heave of towed-bodies, such as t
he weight of the towed-body (in sea water), the length and the weight
(in sea water) per unit length of the cable between towed-bodies and t
owing ship, are investigated in detail. Calculations show that the two
-body towed system can greatly increases the stability of the towed sy
stem.