nope.... the orders you received are just for immersion purposes only, they have no bearing on the player or his actions.
Ubi put the safe in there for a reason... but for whatever purpose - its function was never incluided into the game.
I can only assume that
1. the free cam was to be further modified to incorporate a free walk feature
2. the drawers and cabinets (sme of them) were to be made functional where the player could open them.
3. the safe was to serve some purpose... but due to the fact that many of the developers plans were never implemented into the game before release we may never know why there is a safe "hidden" in the captains quarters.
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