The Inland ENC Product Specification edition 2.2 is a set of specifications intended to enable chart producers to produce a consistent Inland ENC, and manufacturers to use that data efficiently in an Inland ECDIS that satisfies the Performance Standard for Inland ECDIS (Section 1). An Inland ENC must be produced in accordance with the rules defined in this Specification and must be encoded using:

• the Inland ENC Feature Catalogue and
• the rules described in the Inland ENC Encoding Guide

The Inland ENC Product Specification edition 2.2 has been adopted by the Inland ENC Harmonization Group (IEHG) and is applicable in North and South America, Russia and Europe.