Statutory guidance

Approval of Stability Information (MSIS 9)

The requirement for stability approval by the Secretary of State is contained in various SIs and M notices, depending on ship type and size.

This publication was withdrawn on

MSIS 9 has been withdrawn as this document is no longer in use.


Part A Chapter 1, Approval of Stability Information

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.


The main requirements are as follows:

  • merchant shipping (load line) regulations 1998, reg 32(5)* for cargo ships;
  • merchant shipping (passenger ship construction: construction of ships of classes I, II and II(A)) regulations 1998, reg 38; and
  • merchant shipping (passenger ship construction: construction of ships of classes III to VI(A)) regulations 1998, Reg 31.
  • the merchant shipping (passenger ships on domestic voyages) regulations 2000.
  • the merchant shipping (ro-ro passenger ships) (stability) regulations 2004
  • MSN 1823 - safety code for passenger ships operating solely in UK categorised waters
  • the merchant shipping (vessels in commercial use for sport or pleasure) regulations 1998.
  • MGN 280
  • the fishing vessels (safety of 15-24 metre vessels) regulations 2002
  • the fishing vessels (safety provisions) rules 1975.
Published 17 April 2014
Last updated 20 November 2017 + show all updates
  1. An updated version of MSIS 9
  2. First published.