standing tank size limitations, to cause widespread pollution. Pollution not only results from the loss of the cargo of oil or chemicals from a tanker or chemical ship. It can be caused by foundering of ordinary cargo ships, transporting, for example, large quantities of hazardous substances in portable tanks or of pesticides in packaged form. 20. The Sub-Committee therefore considered it essential that all new ships be designed to survive flooding of the machinery space. From its investigations the Sub-Committee concluded there should be little difficulty in satisfying this requirement in ships down to a length of 140-150 m or even to a length of 100 m if a more liberal interpretation of the final condition after flooding is adopted, e.g. giving credit to poop superstructures. 21. It was therefore recommended that the Committee concur with the proposal in the preceding paragraph which might best be implemented by an instruction to the Sub-Committee on Subdivision and Stability to examine and develop appropriate details including necessary amendment of the Safety or Load Line Convention. (c) Measures for limiting the risk of collision or stranding 22. In pursuance of its consideration of individual research studies and model tests on various aspects of stopping and manoeuvrability, the Sub-Committee briefly examined information papers submitted by: (a) the United Kingdom on investigation into squat, a bow duct stopping and manoeuvring device, and a rotating cylinder rudder; (b) the Federal Republic of Germany on model tests on squat, and on the use of controllable pitch propellers in large ships, and (c) by Japan on manoeuvrability tests carried out with a twin screw large tanker. 23. The Sub-Committee, welcoming this further information, encouraged other members to conduct and submit the results of similar and extended research which will be needed for eventual drafting of appropriate recommendations on measures for limiting the risk of collision, stranding or machinery damage. Members agreed to give these important contributions thorough study prior to the next session. It was recommended that the above papers should be submitted as soon as possible to the Sub-Committee on Safety of Navigation for study in connexion with consideration of revision of the collision prevention rules. 24. Concerning the redraft of the Recommendation on the steering gear for large ships, reference is made to paragraph 30 of this report. IV. SAFETY MEASURES FOR CARGO SHIPS WITH UNATTENDED MACHINERY SPACES 25. In pursuance of its remit from the Committee, the Sub-Committee considered comments submitted by Denmark, Israel, the Soviet Union and the United States and the text of additional safety measures proposed by the United Kingdom. 26. After discussion, the Sub-Committee agreed upon a consolidated draft of a Recommendation on Safety Measures for Periodically Unattended Machinery Spaces of Cargo Ships Additional to those Normally Considered Necessary for an Attended Machinery Space set out at Annex VI. This draft Recommendation incorporates certain additional safety requirements over and above those included in those Recommendations previously adopted by the Committee as at Annex XII of MSC XXI/23 and Annex VI of MSC XXII/22. It also includes a number of small editorial amendments. There was, however, an alternative proposal from one delegation in the following terms: "To facilitate attack on a fire on a low level in the machinery space, a special fixed installation operating from outside the space should be accepted as equivalent to the protected fire-fighting position required." and the explanation: "A foam, powder or watersprey system in addition to the fixed system required by the 1960 Safety Convention can cover the low parts of machinery spaces at least as efficiently as a person with a hose." 27. The Sub-Committee recommends that this particular proposal be referred to the Sub-Committee Fire Protection in order that at its next session it might decide whether it should be put forward to the Committee (without further reference to this Sub-Committee) for inclusion in the final recommendation to be put to the Assembly in October 1971. The Committee is invited, subject to this one consideration, to approve the Recommendation for transmission to the Seventh Assembly for adoption. V. AMENDMENTS TO PART O OF CHAPTER II OF THE 1960 SAFETY CONVENTION 28. Arising from consideration at its fifth session of proposals for amending Regulations 29 and 30 of Chapter II of the 1960 Safety Convention with a view to improving safe manoeuvring in particular of large tankers in the event of failure in the main steering gear, the Sub-Committee agreed that the problem would raise wider questions of the present suitability of Part C of Chapter II of the 1960 Safety Convention as a whole. 29. Comments on the matter subsequently submitted by the Federal Republic of Germany, Israel, the United Kingdom and the United States were considered by the Sub-Committee and in the light of the discussion in the Sub-Committee reaffirmed its view formed at the fifth session that the present Part C is outdated and needs to be reviewed. However, thorough study would first be necessary and members of the Sub-Committee were invited to submit detailed comments and proposals in this respect subject to the Committee's concurrence. 30. Meanwhile it became apparent that the Recommendation on Steering Gear agreed to by the Sub-Committee at its fourth session and adopted by the Committee at its twenty-first session, shown at Annex XI of MSC XXI/23, was drafted in too general a manner. In view of the need to deal with the problem of large tankers as speedily as possible, a revised text of the Recommendation was therefore prepared during this session and agreed to by the Sub-Committee and is shown at Annex V. The Committee is invited to approve this revised Recommendation for submission, in lieu of the text shown in Annex XI, MSC XXI/23, to the Seventh Assembly for adoption. VI. RECOMMENDATION ON SAFE ACCESS TO AND WORKING IN LARGE 31. The Sub-Committee received comments by the Soviet delegation on the proposed recommendation for safe access to and attendance of tanks of medium and large tankers which had been submitted by the French delegation to the fourth session. It also noted a paper in which the Norwegian delegation drew attention to proposed national recommendations. An ad hoc working group was established and produced a first draft of a Recommendation on Safe Access to Large Cargo Tanks but in the time available it was not possible for the Sub-Committee to consider this draft in detail. It was agred therefore that the subject be developed at the next session and that meanwhile the ILO should be informed that work on the subject had been commenced in the Sub-Committee. Members were invited to submit further comments on this draft as well as any relevant proposal on safe access to and working in large cargo holds and tanks in time for the next session. VII. SAFETY MEASURES FOR AIR-CUSHION VEHICLES, HYDROFOIL 32. In the absence of further comments on this matter, the Sub-Committee was unable to give further consideration to this item. Members were again invited to submit their comments well before the next session to the Secretariat. It was agreed that at the next session the proposed ad hoc group should commence work on the drawing up a draft recommendation, taking into account any further submissions. 33. In view of the recognized limitations of the applicability of the 1960 Safety Convention to such craft there is an urgent need to bring together the contributions which are being made to the study of the problem by a number of sub-committees. It is recommended that the task of producing a consolidated recommendation be remitted to this Sub-Committee. If the Committee agrees to extend the work programme in this manner the Sub-Committee would take as its starting point, before considering the features perculiar to each type, a central safety philosophy to assure an appropriate standard of safety for the passengers carried in all these high-speed, high-passenger density craft. VIII. SAFETY MEASURES FOR DRILLING RIGS AND PRODUCTION PLATFORMS 34. The Sub-Committe briefly discussed safety measures for drilling rigs and production platforms but lacked further information. Members were therefore urged to submit information on safety measures in accordance with paragraph 34 of DE III/28 to the Secretariat well before the next session. The representative of IACS offered to make relevant requirements issued by member societies available to the Sub-Committee. IX. TRAINING AND QUALIFICATION OF OFFICERS AND CREW OF SHIPS 35. The Sub-Committee considered a paper by the United Kingdom on procedure and concurred that the Ad Hoc Group on Bulk Chemicals should outline the areas in which specialized training of officers and crew is necessary for the safe operation of bulk chemical tankers, taking also account of the information on national training programmes provided by Norway and the United Kingdom. During the session the Ad Hoc Group prepared a draft of the main topics of such training programme. Considering the document the Sub-Committee invited Members to submit comments on this specialized aspect of training to the Secretariat in good time before the next session. 36. Members were invited to include in their delegations to the next session experts on the subject so that the task could be pursued properly. X. WORK PROGRAMME OF THE SUB-COMMITTEE 37. The Sub-Committee, noting that the Committee will consider its future work programme at its forthcoming twenty-third session, considered its own work programme and taking into account work accomplished, agreed on the remaining items as set out at Annex VI. In this connexion the Committee's attention is drawn to the fact that notwithstanding completion of the consolidated Recommendation on Safety Measures for Periodically Unattended Machinery Spaces of Cargo Ships (Annex IV) the view was expressed that in the light of the rapid development of automation in ships, item 9 of the work programme should be retained. XI. DATE OF THE NEXT SESSION 38. The Sub-Committee was informed that proposals are being submitted to the twenty-third session of the Committee calling inter alia for a further meeting of this Sub-Committee this year in order to progress matters relative to early implementation of effective measures to prevent marine pollution by oil. It further took note that the programme of meetings for the next budgetary period 1972/73 would be agreed by the Seventh Assembly in the autumn. No decision could therefore be made in respect of the next session. The view was expressed that although circumstances might sometimes dictate the necessity for an interval of only six months between sessions, this was not normally sufficient to allow delegations to conduct studies in their national bodies and to prepare documents in good time. XII. DECISIONS BY THE MARITIME SAFETY COMMITTEE 39. The Committee is invited to consider and approve the report of the sixth session of the Sub-Committee and in particular: (a) To approve the Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk referred to in paragraph 5 and set out at Annex II and subsequently to request the Sub-Committee on Subdivision and Stability to consider the subdivision and stability requirements in 2.2 of the Code in order to draw up a recommendation for unified application of them and to study the length limits in respect of the ability to survive flooding of the machinery space (paragraph 6(i)); (b) To consider the recommended requirements relating to tank arrangements and to the limitation of tank size referred to in paragraph 9 and set out at Annex III and, if the concepts employed are accepted, to decide the values to be applied therein; (c) To request the Sub-Committee on Subdivision and Stability to consider amendments to the 1966 Load Line Convention and/or 1960 Safety Convention as proposed in paragraphs 20 and 21; (d) To approve the consolidated document on the Recommendation on Safety Measures for Periodically Unattended Machinery Spaces of Cargo Ships Additionally to those Normally Considered Necessary for an Attended Machinery Space, referred to in paragraph 26 and set out at Annex IV; (e) To include in the Sub-Committee's work programme amendments of Part C of Chapter II of the 1960 Safety Convention as proposed in paragraph 29; (f) To approve the Recommendation on the Steering Gear for Large Ships referred to in paragraph 30 and set out at Annex V; (g) To consider the need for consolidation of technical requirements for aircushion vehicles and hydrofoil craft and, if agreed, to decide whether this SubCommittee should be assigned that task (paragraph 35); and (h) To approve the work programme of the Sub-Committee referred to in paragraph 37 and shown at Annex VI. ANNEX I-AGENDA INCLUDING LIST OF DOCUMENTS 1. Adoption of the agenda: DE VI/1—Secretariat. 2. Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk: DE V/9, Annex II, Sub-Committee, DE VI/WP.2, F.R. Germany. DE VI/2, Norway, DE VI/WP.5, Ad Hoc Group. DE VI/2/1, Liberia, DE VI/WP.5/Add.1, Ad Hoc Group. DE VI/2/2, USSR. DE VI/2/3, F.R. Germany, DE VI/WP.10, Ad Hoc Group. 3. Construction and equipment of tankers from the point of view of preventing pollution of the sea: (a) proposed requirements on tank arrangements: DE V/9, Annex III, Sub-Committee DE VI/WP.3/Rev.1, Ad Hoc Group. DE VI/3, Italy, DE VI/WP.3/Rev.1/Corr. 1, Ad Hoc Group. DE VI/3/1, Japan, DE VI/WP.6/Rev.1, Ad Hoc Group. DE VI/3/2, Norway, DE VI/WP.8, Canada and Japan. DE VI/3/3. Denmark, DE VI/WP.8,/Add.1, Canada and Japan. DE VI/3/6, Liberia, DE VI/WP.9, UK. DE VI/3/8, ICS, DE VI/WP.9/Add.1/Rev.1, UK. DE VI/3/9, Canada, DE VI/WP.12, Italy. DE VI/3/10, Poland, DE VI/WP.14, Denmark. DE VI/3/12, USSR. (b) amendments to the 1966 Load Line Convention: DE VI/3/4, Denmark. DE VI/3/5, USSR. DE VI/3/7, Norway. DE VI/3/11, F.R. Germany. (c) measures for limiting the risk of collision or stranding: DE/44, UK, DE/48, UK. DE/45, UK, DE/49, F.R. Germany. DE/46, UK, DE/50, F.R. Germany. DE/47, UK, DE/51, Japan. 4. Safety measures for cargo ships with unattended machinery spaces: DE VI/4, Israel. DE VI/4/1, Denmark. DE VI/4/2, UK. DE VI/4/3, USSR. DE VI/4/4, USA. DE VI/WP.7, Ad Hoc Group. 5. Amendments to Part C of Chapter II of the 1960 Safety Convention: DE VI/5, Israel. DE VI/5/1, UK. DE VI/5/2, F.R. Germany. DE VI/5/3, USA. DE VI/WP.4/Rev.1, Sub-Committee. 6. Recommendation on safe access to and working in large cargo holds or tanks: DE VI/6, USSR, DE/42, Norway. DE VI/WP.1, Ad Hoc Group. 7. Safety measures for air-cushion vehicles, hydrofoil boats and similar craft: 8. Safety measures for drilling rigs and production platforms: 9. Training and qualification of officers and crew of ships carrying hazardous or noxious cargoes: DE VI/9, UK. DE VI/WP.15, Ad Hoc Group, DE/43, UK/Norway. 10. Other matters: DE VI/10, Secretariat. DE VI/WP.13, Secretariat. 11. Report to the Maritime Safety Committee: DE VI/WP.11, Secretariat. DE VI/11, Sub-Committee. ANNEX II-CODE FOR THE CONSTRUCTION AND EQUIPMENT OF SHIPS CARRYING DANGEROUS CHEMICALS IN BULK Preamble 1. This Code has been developed to provide an agreed international standard for the safe carriage by sea of dangerous chemicals in bulk by prescribing the constructional features of ships involved in such carriage and the equipment they should carry with regard to the nature of the products involved. The basic philosophy is one of ship types related to the hazards of various chemicals covered by the Code. 2. The United States publication "Evaluation of the Hazards of Bulk Water Transportation of Industrial Chemicals" was used as the basic guide in evaluating the hazards of the products considered in the Code and supplemented by other hazard rating systems. 3. It is intended that either the Code will be extended or further codes will be drawn up to cover hazardous gases in bulk (compressed or liquefied) and the carriage of dangerous chemicals in non-propelled vessels. 4. It is recognized that the subject of cargo size limitation warrants consideration in the context of the Code. However, in this respect, it is considered that a further study in depth is necessary before any comprehensive provisions can be incorporated. The figures for cargo size limitation which are currently detailed in Chapter V of the Code have therefore been agreed as "holding figures" and it is intended that a deeper study in connexion with this requirement will be undertaken. 5. In order to ensure uniform interpretation and application of the subdivision and damage stability requirements by Administrations the relevant section has to be reviewed. 6. It is recognized that the section on fire protection is at present incomplete and it is intended to await the results of relevant studies currently being undertaken before expanding these provisions. In the meantime, advice should be sought from Administrations with regard to detailed fire protection arrangements. 7. It is intended to re-examine that part of the Code dealing with electrical requirements when work on this subject has been completed by the International Electrotechnical Commission and considered by Administrations. 8. The transitional period for full compliance with the Code by existing ships is not intended to replace any controls over existing ships which may already be in operation in certain countries. During the transitional period, existing ships should comply with the Interim Recommendation for Existing Ships. 9. A list of products which are not considered to come within the scope of the Code is reproduced in Chapter VII. This list may be used as a guide when consideration is being given to the bulk carriage of products whose hazards have not yet been evaluated. 10. The Code will be kept under constant review taking into account both experience and future developments with regard to the bulk carriage of dangerous chemicals. |