Tracking near-sea targets by the shipborne optical-electronic equipment may be failed for the swing of ship and sea-noise-wave. For precisely controlling the near-sea targets

a new algorithm is proposed for the automatic tracking of near-sea targets combined the CA model based Least Square Method (LSM) with the approximate-comparison model based on feed forward control technology. The algorithm firstly feeds the speed data come from an inertial angle to the speed loop by the CA model based LSM

then it is used to determine whether the sea-noise-wave is acquired or not by the approximate-comparison model. If the sea-noise-wave is acquired

the tracking mode should be switched from TV tracking to guiding tracking. An experiment is carried out

results demonstrate that the re-acquire time has been shortened to 437 ms from 5.39 m

which is higher an order of magnitude than that of original method. By proposed algorithm

an automatic tracking can be realized and the re-acquire time come from "dipping sea" is shortened greatly.