R. A. Rasmusen Sea Scout Base 7005 NE Marine Dr . Portland , OR 97218 503-288-1677 The Sea Scout base is parallel to the Portland International Airport. Arriving from the west. After passing the National Weather Serice, watch for the Sea Scout Base sign on the left on the dike. Be prepared to make a sharp left hand turn onto what appears to be a walkway --- PLEASE WATCH OUT for cyclists and pedestrians along the dike access trail system. Parking is extremely limited. The entrance and exit are one way --- caution is advised.