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External Access System 

11/01/10

Appendix A

MARINE GUIDANCE NOTE 

MGN 422 (M)

Use of Equipment to Undertake Work Over the Side 

on Yachts and Other Vessels 

Notice to all Shipowners, Masters and Crew 

This notice should be read with the Code of Safe Working Practices for 

Merchant Seamen Chapters 4 and 15 

PLEASE NOTE:-  

Where this document provides guidance on the law it should not be regarded as definitive.   

The way the law applies to any particular case can vary according to circumstances - for 

example, from vessel to vessel and you should consider seeking independent legal advice if 

you are unsure of your own legal position. 

Summary 

This MGN provides guidance on the use of “rail and trolley” and similar systems for 

undertaking “overside” work on yachts and other vessels.  The main points are: 

  to ensure that new systems comply with BS standards; 

  to ensure that existing systems have been checked to an equivalent standard; 

  to ensure operators have been trained in their use; 

  to ensure maintenance is carried out to the manufactures advice 

Annex 1 give details of the relevant legislation that applies and Annex 2 give details of testing 

and operation. 

1. Introduction 

1.1 The use of single point safety “rail and trolley” systems is becoming more prevalent on 

vessels, especially mega-yachts. These allow crewmembers to work outside conventional 

guardrails for cleaning and maintenance purposes on yachts or other vessels. In recent 

years there have been a number of accidents using substandard equipment of this type. 

Also there has been evidence that the manufacturers’ instructions on their use are not 

being followed. The purpose of this notice is to give guidance on their use. 

1.2 Most consist of two travellers linked in tandem that can be separated if necessary into 

independent units.  These are fitted to a metal track rail which allows the travellers to glide 

along it. There is the option of having more than one traveller on the rail. However, many of 

these systems have been designed, and installed, for the sole purpose of sail handling and 

not for supporting workers working over the side of the vessel.  

1.3 Equipment which is used for lifting persons must be designed for the purpose and it is not 

acceptable to use a work station harness or a bosun’s chair attached to a rail and trolley 

system designed for sail handling to enable window cleaning or other overside 

maintenance to be undertaken. 

- 1 - 

MARINE GUIDANCE NOTE 

MGN 422 (M)

Use of Equipment to Undertake Work Over the Side 

on Yachts and Other Vessels 

Notice to all Shipowners, Masters and Crew 

This notice should be read with the Code of Safe Working Practices for 

Merchant Seamen Chapters 4 and 15 

PLEASE NOTE:-  

Where this document provides guidance on the law it should not be regarded as definitive.   

The way the law applies to any particular case can vary according to circumstances - for 

example, from vessel to vessel and you should consider seeking independent legal advice if 

you are unsure of your own legal position. 

Summary 

This MGN provides guidance on the use of “rail and trolley” and similar systems for 

undertaking “overside” work on yachts and other vessels.  The main points are: 

  to ensure that new systems comply with BS standards; 

  to ensure that existing systems have been checked to an equivalent standard; 

  to ensure operators have been trained in their use; 

  to ensure maintenance is carried out to the manufactures advice 

Annex 1 give details of the relevant legislation that applies and Annex 2 give details of testing 

and operation. 

1. Introduction 

1.1 The use of single point safety “rail and trolley” systems is becoming more prevalent on 

vessels, especially mega-yachts. These allow crewmembers to work outside conventional 

guardrails for cleaning and maintenance purposes on yachts or other vessels. In recent 

years there have been a number of accidents using substandard equipment of this type. 

Also there has been evidence that the manufacturers’ instructions on their use are not 

being followed. The purpose of this notice is to give guidance on their use. 

1.2 Most consist of two travellers linked in tandem that can be separated if necessary into 

independent units.  These are fitted to a metal track rail which allows the travellers to glide 

along it. There is the option of having more than one traveller on the rail. However, many of 

these systems have been designed, and installed, for the sole purpose of sail handling and 

not for supporting workers working over the side of the vessel.  

1.3 Equipment which is used for lifting persons must be designed for the purpose and it is not 

acceptable to use a work station harness or a bosun’s chair attached to a rail and trolley 

system designed for sail handling to enable window cleaning or other overside 

maintenance to be undertaken. 

- 1 - 

Summary of Contents for H-50547

Page 1: ...instructions must be provided to the user of this equipment The user must read and understand these instructions before using this equipment Manufacturer s instructions must be followed for proper us...

Page 2: ...ecial order allow 3 weeks for delivery 6 19 81 4 100 315 16 8 FH 5 16 FH C10210 CLEAR Midrange high load pinstop track special order allow 3 weeks for delivery 3 9 101 16 50 131 32 6 SHCS 1 4 SHCS 161...

Page 3: ...r use with Harken approved components Substitutions or replacements made with non approved components may jeopardize compatibility of equipment and may affect the safety and reliability of the system...

Page 4: ...r abrade against unprotected sharp edges TRACK INSTALLATION Always use threadlocking solution or locknuts Precise track alignment at joints is critical for smooth running cars Use Splice Links Part 16...

Page 5: ...in use WARNING This product is part of a personal fall arrest system The user must follow the manufacturer s instructions for each component of the system These instructions must be provided to the u...

Page 6: ...a fall severe injury and death C Inspect shackles for signs of corrosion cracks or elongation If damaged do not use Damaged shackles can indicate that car was overloaded Return complete car assembly t...

Page 7: ...ip car so Pivot Pin slides out C Remove shackle and inspect If it shows any sign of corrosion cracking or wear return complete car assembly to a service recertification center listed on the back of th...

Page 8: ...eveals an unsafe or defective condition remove item from service and destroy it If in doubt please contact manufacturer for further advice 6 Inspection Car Balls Car Balls Order Balls Set Ball HC9606...

Page 9: ...two drops of McLube OneDrop Roll car back and forth to distribute Do not use spray lubricants because ball bearings may skid not roll It is important to clean car as excessive build up of grease dirt...

Page 10: ...s the responsibility of the user organisation to provide the record and to enter onto the record the details required EXAMINATION REPAIR HISTORY Date Reason for Entry Periodic exam or repair Defect no...

Page 11: ...06 29 09 External Access System 11 Drawing H 49971...

Page 12: ...il and trolley system designed for sail handling to enable window cleaning or other overside maintenance to be undertaken 1 MARINE GUIDANCE NOTE MGN 422 M Use of Equipment to Undertake Work Over the S...

Page 13: ...each traveller designed to accommodate a single line such as a harness One of the travellers is fitted with a locking device The device which locks the traveller in position along the track rail must...

Page 14: ...Fax 44 0 23 8032 9251 e mail seafarer s h mcga gov uk General Inquiries infoline mcga gov uk MCA Website Address www mcga gov uk File Ref MC122 6 0026 Published September 2010 Please note that all add...

Page 15: ...ision and Use of Work Equipment Regulations 2006 No 2183 guidance on which is contained in Marine Guidance Note MGN 331 M F require an employer to ensure that all work equipment made available to work...

Page 16: ...410 require employers to ensure that work equipment used for work at height is the most suitable to ensure and maintain safe working conditions for workers using that equipment The Regulations also r...

Page 17: ...anchor points of the traveller bar Again there should be no damage to the structure This test should be repeated at the extreme anchor points and at an intermediate one 5 Precise descriptions of the...

Page 18: ...healthandsafety mcga dqs shs health_and_safety mcga coswp 2008 htm and BS7883 2005 PPE Anchor Device Testing From this we can draw two critical principals A Any safety equipment or lifting device mus...

Page 19: ...val the proof test procedure would be i This is a static test There is no drop load ii The car is not expect to move under these conditions iii Attach a water bag to a single car iv Fill to achieve a...

Page 20: ...lity or responsibility for damages or expenses relating to defects caused by misuse abuse failure to install use maintain or store the HARKEN product as specified in the warranty booklet service bookl...

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