Hospital | Walkthrough S.T.A.L.K.E.R.: CS Guide

The situation here is similar to Agroprom Sewers which means you won't be allowed to use your personal map. Thankfully, there's nothing you should be worried about, because this level has a very linear structure and you'll be operating in small rooms. As for threats, you'll be dealing with a lot of Monolith units and you're going to have to take down an enemy helicopter as well.