At the end of the 1980s, there were hardly any service organisations with European coverage for towed equipment. Finding a workshop in a fairly far-flung foreign country to repair a vehicle that had broken down was not easy in those days without internet.
TRTA decided to bundle the available knowledge of its members and drew up a list of service workshops in each country where members had experienced good service.
This list was regularly updated and eventually gradually became no longer needed as the internet and professional breakdown service organisations became more widely available on the market.