You will get to hear a good narration of the history of the city and, if you are lucky, a good selection of cheesy jokes. On a clear day this is absolutely the best way to capture that special snapshot of Seattle.
You feel so small when you cruise next to the massive cargo ships that dock in the shipyard. Keep your eyes open here for harbor seals that like to fish here as well.
The Seattle Waterfront Harbor Sightseeing Tour Cruise by Argosy Cruises is definitely a good way to get a first look at Seattle.