Basic safety Margin Most of these formulae increase an extra a few metres, which translates to a bit more 'additional rope' as being a 'security margin'. Summary Rigging devices need to have properly calculated and Reduce ropes to function properly. This then enables sheets to manage and halyards to hoist http://nova-argonautica86285.canariblogs.com/the-ultimate-guide-to-sheets-and-halyards-for-boat-10670836