Aastoa or Aasloe in Afjord Sør Trøndelag

I found a family book with the following excerpt "Tiltrem is located on the Norwegian Sea near Jossund, southwest of Afjord. Teksdal and Aastoa are not directly on the water, but are inland a few miles." I looked on a map and thought it was spelled Aasloa---can someone tell me which is correct?