Description

The purpose of all RTF messages is to convey information or instructions unambiguously to a specific recipient or recipients. Use of standard format and content will help to achieve this purpose.

Use of nonstandard message format and/or content may result in one or more of the following undesirable outcomes:

• The message is not received by the intended recipient;
• The message is acted on by an unintended recipient (call sign confusion);
• The message has to be repeated, resulting in delay in response and frequency congestion;
• All or part of the message is misunderstood;
• Parts of the message may be confused and incorrectly acted on.

Composition of Messages

The following provisions abridged from ICAO Annex 10 Volume II, Chapter 5, Section 5.2.1. are designed to achieve the above objectives: