The Rules and Regulations for the Classification of Special Service Craft apply to sea-going motor, sailing and auxiliary craft of normal form, proportions and speed, generally not exceeding a Rule length, LR of 150 m. These Rules are applicable to the following craft types constructed from steel, aluminium alloy, composite materials or combinations of these materials:  High-speed craft Light displacement craft Multi-hull craft Yachts of overall length, LOA, 24 metres or greater Craft with a draught-to-depth ratio less than or equal to 0,55 In addition, the following craft types will be considered upon request on the basis of the Rules:  Amphibious air cushion vehicles Rigid inflatable boats Hydrofoil craft Foil-assisted craft Craft with a Rule length, LR, less than 24 metres and draught to depth ratio greater than 0,55 This record also includes notices no. 1-4