How do you beat docks level in tactical assassin?

To beat the Docks level in Tactical Assassin, carefully observe the movements of the enemies and the layout of the environment. Use your sniper rifle to eliminate targets without being detected, focusing on the guards that pose the greatest threat to your mission. Pay attention to the timing of their movements and take your shots when they are isolated. Lastly, make sure to complete any objectives specified in the level to ensure success.