Section 1 General

101. Propulsion and auxiliary engine, etc.

1. Internal combustion engines, gas turbines, shafting, power transmission systems, pressure vessels, etc. are to comply with the relevant requirements in the Rules for Classification of Steel Ships or other equivalent rules. However, for the requirement of Pt 5, Ch 3, 203. and 204. of the Rules for Classification of Steel Ships, it is be complied with following requirements.

(1) Intermediate shaft and thrust shaft

(A) The diameter of intermediate shaft and thrust shaft shall be not less than

mm

: according to Pt 5, Ch 3, 203. of the Rules for Classification of

Steel Ships.

(B) For yacht restricted in coastal service, it may be reduced to 95 % of values calculated by

(A) above.

(2) Propeller shaft and stern tube shaft

(A) The diameter of propeller shaft and stern tube shaft with effective protection against

mm

: Pt 5, Ch 3, 203. and 204. of the Rules for Classification of Steel Ships

: factor concerning material of shaft as follows

: specified minimum tensile strength (N mm ) of proposed material. For the

(B) For propeller shaft and stern tube shaft with corrosion-resistant materials or without effective

protection against seawater corrosion, it is to be applied to Pt 5, Ch

Guidance for Classification of Steel Ships .

3, 204. of the

(C) For a yacht restricted in coastal service, it may be reduced to 95 % of values calculated by

(A) or (B) above.

2. Main and auxiliary engines, gear and water-jets may be installed with ratings as for yachts.