Section 2 Definitions

201. Application

The definitions of terms which appear in these Rules are to be as specified in this Chapter, unless otherwise specified elsewhere.

202. Length

The length of ship (Ã ) is the distance in meters on the designed maximum load line, from the fore

side of stem to the aft side of rudder post in case of a FRP ships with

of rudder stock in case of a FRP ship without rudder post. However,

rudder post, or to the axis

à is as defined above or

96 %, not exceed 97 %, of the total length on the designed maximum load line.

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203. Breadth

The breadth of ship (Æ ) is the horizontal distance in meters between the outside of side shell plates measured on the upper surface of upper deck plates at side at the broadest part of the hull.

204. Depth

The depth of ship (Á) is the vertical distance in meters at the middle of à measured from the top of keel to the top of the freeboard deck beam at side. Where watertight bulkheads extend to a deck above the freeboard deck and are to be registered as effective to that deck, Á is the vertical distance to that bulkhead deck.

205. Midship

The midship part of ship is the part for 0.4 Ã amidships unless otherwise specified.

206. Fore and End Parts

The fore and end parts of ship are the parts for 0.1 Ã from each end of the ship.

207. Load Line

The load line is the waterline corresponding to the designed summer load draught or the designed sea water load draught in case of a FRP ship which is required to be marked with load lines and the waterline corresponding to the designed maximum draught in case of a FRP ship which is not required to be marked with load lines. However, the designed maximum draught is the waterline

corresponding to the 0.9 Á from the top of keel plate for the FRP ship of which

maximum draught is not assigned.

the designed

208. Load Draught

The load draught (ᾘ) is the vertical distance in meters from the top of keel plate to measured at the middle of à .

the load line

209. Freeboard Deck

1. The freeboard deck is normally the uppermost continuous deck. However, in case where openings without permanent closing means exist on the exposed part of the uppermost continuous deck or where openings without permanent watertight closing means exist on the side of the ship below that deck, the freeboard deck is the continuous deck below that deck.

2. In an FRP ship having a discontinuous exposed deck, the lowest line of the exposed deck or the continuation of that line parallel to the upward deck is taken as the freeboard deck.

210. Strength Deck

The strength deck at a part of ship's length is the uppermost deck which reach the shell plate at any part of that deck. However, in case of having the superstructure, except sunken superstructures, which is not considered effective to longitudinal strength, the strength deck is the deck just below the superstructure deck.

211. Fibre Reinforcements

The fibre reinforcements are glass chopped strand mat (hereinafter referred to as "chopped mat"), roving, roving cloth, woven roving and woven cloth, single-direction roving and multi-directions roving made of fibreglass, aramid fibre or carbon fibre.

212. Resins

The resin is a thermosetting resin for laminating and gelcoats.

213. Blending Proportion

The blending proportion is a ratio in weight of the applied hardener and accelerator to the resin.

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214. Laminating

Laminating is an operation of laying succeeding fibre reinforcement impregnated with resin before curing or before the preceding layer advances in cure.

215. Bonding 【See Guidance】

Bonding is an operation of connecting the FRP already advanced in cure with other FRP members, timbers, hard plastic foams, etc. by means of impregnating fibreglass reinforcements with resin.

216. Moulding

Moulding is an operation of manufacturing FRP products with definite form, strength, etc., by means of laminating or bonding.

217. Single Skin Construction

The single skin construction is a construction composed of FRP single panels moulded with fibre reinforcement and resin.

218. Sandwich Construction

The Sandwich construction is a construction having FRP layers adhered to the both sides of core material such as hard plastic foam, balsa, timber (including plywood), etc.

219. Hand Lay-up Method 【See Guidance】

The hand lay-up method is a method of manual moulding by impregnating fibre reinforcements with resin.

220. Spray Lay-up Method

The spray lay-up method is a method of moulding by spraying simultaneously fibre reinforcements and resin using spray lay-up apparatus.

221. FRP Material Tests

FRP Material Tests are tests and inspections of raw material to be carried out..

222. FRP Specimen Tests

The FRP material tests are tests and inspections of FRP to be carried out prior to the commence- ment of moulding of FRP ships.

223. FRP Strength Tests

The FRP strength tests are tests and inspections to be carried out after the completion of FRP ships.