SECRET SERVICE DATA 1/3
After getting on board go straight ahead. At some point go through a container on the left.
Turn left after leaving the container. Take the secret before using Walkiria rockets to shoot two helicopters belonging to the enemy.
SECRET SERVICE DATA 2/3
During the explosion at the bottom decks of the ship you will reach a control room guarded by your enemies.
After eliminating the enemies look under the desk situated opposite the entrance.
SECRET SERVICE DATA 3/3
At the end of this mission you will reach a control room situated upstairs guarded by two hostile soldiers.
After eliminating the enemies check the desk situated on the right. The secret is under one of them.