7A.1 General Requirements

  7A.1.1 The machinery and it's installation should, in general, meet with the requirements of one of the Classification Societies named in the National Annex. The Class Survey or Notation should include, as a minimum, propulsion and electrical generation machinery and shafting. For existing and new vessels which operate with periodically unattended machinery spaces, the machinery and its installation should meet the standards of SOLAS Chapter II-1/Part E - "Additional requirements for periodically unattended machinery spaces, so far as is reasonable and practicable to do so".

Plastic piping may be accepted where the piping and the arrangements for its use meet the requirements of the IMO Fire Test Procedures Code.

  7A.1.2 The requirements for main propulsion are based upon the installation of diesel powered units. When other types of main propulsion are proposed, the arrangements and installation should be specially considered. Where gas turbines are to be fitted, attention should be paid to the guidance contained within the IMO High-Speed Craft Code, and installation is to be to the satisfaction of the Administration.

  7A.1.3 Notwithstanding the requirements of paragraph 7A.1.1, in a fuel supply system to an engine unit, where a flexible section of piping is provided, connections should be of a screw type or equivalent approved type. Flexible pipes should be fire resistant/metal reinforced. Materials and fittings should be of a suitable recognised national or international standard.