Main contents of revisions are as follows:

PART TWO  HULL

1) Incorporation of IACS mandatory requirements: clarifying requirements for small hatches on container ship giving access to a cargo hold in accordance with IACS UR S26 (Rev.5); adjusting requirements for minimum thickness of the plate of sea-going ships with L<65m in accordance with IACS UR S3 Rev.2; revision made in accordance with IACS UR S21 Rev.6. UR S21 Rev.6 integrates the original UR S21A and UR S21, applicable to a wide range of hatch cover requirements; fully incorporating newly released IACS UR S35, which gives general process of buckling assessment; revising relevant requirements for rudders in accordance with IACS UR S10 (Rev.7); adding mooring and anchoring requirements for tugs under 45 m in length intended for towing service only or for ships of length less than 90 m in accordance with IACS UR A1 (Rev.8); revising the guidelines for calculation of bending moment and shear force distribution of rudder-rudder stock in accordance with IACS UR S10 (Rev.7); incorporating requirements of IACS Rec.10 (Rev.5), as an alternative, direct force calculation may be performed to determine the necessary anchoring equipment for monohull ships with length less than 90m.

2) Revision of technical requirements: revising technical requirements for butt weld of plates of different thicknesses; further clarifying the specified value of thickness of the plate keels of ships in restricted service to avoid ambiguity; deleting technical requirements for occasionally carrying bulk cargo; revising the definition of a bulk carrier applicable to the chapter on bulk carriers as a typical bulk carrier, along with corresponding revisions; adding technical requirements for external glass balustrades, with provisions for glass material, thickness and connection means.

PART THREE  MACHINERY INSTALLATIONS

Revising requirements for valve type on collision bulkhead in accordance with resolution MSC.474(102); adding the condition where the generator electrical degree is not limited to 3.5°.

PART FOUR  ELECTRICAL INSTALLATIONS

Clarifying requirements when vehicles with fuel in their tanks for their own propulsion are carried in ordinary cargo spaces; revising requirements for electrical equipment of certified safe type when carrying ammonium nitrate fertilizer.