It is important to assess and improve the warship survivability for the weapon threats which have an critical effect on warship. Warship Survivability is defined as the capability of a warship to avoid or withstand a man-made hostile environment. The survivability of the warship consists of three categories (susceptibility, vulnerability and recoverability). Firstly, the susceptibility is defined as the inability of a warship to avoid radars, guns, missiles and ETC. Secondly, the vulnerability is defined as the inability of a warship to withstand the man-made hostile environment. Finally, the recoverability is defined as the ability of a warship to recover the damaged components and systems. This paper has described the vulnerability assessment for the hypothetical system which is composed of critical components. Also, the procedure based on the CAVART model is suggested to calculate the vulnerable probability of the damaged warship.