Make sure you take a guided tour of the ship -- the guide will be able to show / explain much of the details to you. We had a great guide (Kathleen O'Brien) who was very helpful in explain things to us (and answered all of our questions).
We purchased our entry ticket at the Maritime Museum of the Atlantic (they had discounted Adult entry tickets).
If you are visiting downtown Halifax, and you enjoy history, you should visit this ship.
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