A tour of the harbour is included with a multi-attraction ticket to the Historic Dockyard. I recommend taking the tour early on to get an overview of the area and introductory information about this busy port.
In addition to the ships, which are amongst the attractions, there are various Royal Navy and other ships in the harbour. I'll include a few examples from my April 2017 visit.
|Powerful & Helen|
|102 and 81|
Also, here is a brief video clip from the tour.