ICS 47.020.90                                                                            TED 17

Reaffirmed 2018

National Foreword

This Indian Standard (First Revision) which is identical with ISO 9785 : 2002 ‘Ships and marine technology - Ventilation of cargo spaces where vehicles with internal combustion engines are driven - Calculation of theoretical total airflow required’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Shipbuilding Sectional Committee and approval of the Transport Engineering Division Council.

This standard was first published in 1999. The present revision has been undertaken to harmonize with current international practices. Besides other, factor of dilution with respect of general cargo spaces have been increased substantially in the revised standard.

The purpose of this standard is to ensure that exposure to substances hazardous to health should be kept as low as is reasonably practicable in work areas in cargo spaces in ships. This can, as a rule, be achieved by limiting exhaust gas emissions as far as possible (by controlling the traffic) and by providing a high flow of air in the cargo spaces. For further information and guidance regarding good practice, please refer to recent guidelines developed by the International Maritime Organization which are contained in the IMO Maritime Safety Committee Circular 729 (MSC Circ. 729), Guidelines arm’ Operational Recommendations for Ventilation Systems in RO-RO Cargo Spaces.

The text of the ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.

Annex A forms a nomative part of this Standard. Annex B is for information only.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.