16. Go to the table with the globe.
Put the following objects on the table:
D shaped ruler
Angle measuring instrument
L shaped ruler
Old style sea compass
You'll automatically receive a paper in your inventory with some coordinates.
17. Go to the desk/code panel to the right of the wheel. The code is related to a picture of a man on a wall named Charles Fryatt.
Search online when he was born: 1872.
Put this code into the panel.
24. Go to the exit door and enter the code:
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25. Mission accomplished!
Proceed to Mission 6.