Under Lock and Keys

Objectives
Collect the Captain's Key, Apothecary's Key, and Navigator's Key on the Swift Vengeance, then use them to open the Reinforced Cage.
 * Captain's Key (quest item)
 * Apothecary's Key
 * Navigator's Key
 * Reinforced Cage unlocked

Description
Three keys? It seems Sylvanas didn't trust any one member of this crew to have access to Proudmoore.

We won't be able to rescue Derek Proudmoore if we can't get his cage open.

We'll need to keep an eye out for keys while we clear the ship.

Rewards
You will receive:
 * 22,300 XP
 * 22,300 XP

Progress
This will all be for nothing if we can't open that lock...

Completion
We've done it!

I was worried I would have to try to bend the cage bars apart.