Template:MGS3 Nav Objectives aren't actually given in the game (there's no mission objectives screen, anyway) but they are included to make your life easier.
Dremuchij South
Objective: Retrieve your backpack Go east and up the slope. Jump down the cliff, climb the tree, walk out onto the branch, and press Triangle near the backpack. There, wasn't that easy? Objective: Locate Sokolov Feel free to practice the controls and such here. Once you're done, go north to the next area.
Dremuchij Swampland
When moving through the swamp, enter by rolling and try to stay near land--sinking and drowning is among the most embarrassing deaths in a videogame, right up there with being killed by the Indian Gavials that inhabit the swamp.
Dremuchij North
East of your starting position is a hidden area with a sniper rifle. The sentries can be dealt with in a number of ways--snipe them; tranquilize them; run in and knife them; take one hostage and use him as a shield to shoot the other, then knock the first out...the possibilities are endless in MGS. There is a pair of thermal goggles in a log in the lowlands to the northeast. Proceed to Dolinovodno.
Dolinovodno
Shoot the beehive. Obviously. This will cause the first guard to run off and spread the hornets to his buddies, so all three will be taken care of for a while. There is an XM16E1 in the alcove under the far end of the bridge.
Rassvet
Objective: Rescue Sokolov Simple enough, just head to the east side of the abandoned factory and enter Sokolov's room from that direction. The guards do not need to be disabled.There will be a longish cutscene, followed by a non-interactive sequence wherein you meet Ocelot and his elite unit...who Snake proceeds to wipe his ass with. Did I mention you are a badass? Objective: Extract Sokolov Unequip your weapon and press Square next to Ocelot's body. This will pick him up and drop him, in the process shaking out an item--in this case, a Mousetrap. Set it near the entrance to the area, then return to Dolinovodno for a surprise.
Dolinovodno Riverbank
Cure your injuries as Para-Medic instructs. Save when asked to.