The small tug Belle D has become busier with the start of cruise season in Halifax. The tug is used to handle a barge for ship's garbage and waste. The benefit of using a barge, as opposed to trucking the waste away, is that it happens on the 'off' side of the cruise ship and does not interfere with the passengers' comings and goings. All international garbage and waste requires special disposal procedures, including incineration for certain classes of waste.
In the photo Belle D is south bound for pier 31 to handle waste from the cruise ship Veendam.