View all text of Subpart B [§ 167.50 - § 167.1703]
§ 167.51 - In the approaches to Portland, ME: Precautionary area.
A precautionary area is established with a radius of 5.45 miles centered upon geographical position 43°31.60′ N, 70°05.53′ W, the areas within separation zones and traffic lanes excluded.