Listener questions about marine pilots

Today, some questions about pilots from a new listener to the Ship Report. A great opportunity to talk about one of my favorite subjects.

Steve asked, "Are pilots onboard for the whole journey, say Astoria to Portland?  At anchorage, as well? Also, are there pilot "bases" in Kalama and Portland in addition to Astoria?" 

Today we'll talk about these questions and more about the fascinating topic of marine pilots.