MGN 321 (M) AIS on double-ended passenger ferries

Double-ended passenger ferries with one Transmitting Heading Device (THD) must have an interface to maintain correct heading data into AIS


MGN 321 (M) AIS on double-ended passenger ferries

This file may not be suitable for users of assistive technology. Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.


Notice to:

  • all shipowners/operators
  • shipbuilders
  • masters and ship’s officers
  • shorebased maintenance providers
  • equipment manufacturers
  • classification societies and vessel traffic services (VTS) authorities

This notice should be read with MSN 1795 (M)

Published 28 April 2006