Backstays

Long lines or cables, reaching from the stern of the vessel to the mast heads, used to support the mast.
Found on http://en.wikipedia.org/wiki/Glossary_of_nautical_terms

Backstays

Lines supporting the masts from fore-and-aft forces.
Found on http://shipwrightjournal.blogspot.co.uk/p/glossary-of-nautical-terms.html

Backstays

Long lines or cables, reaching from the rear of the vessel to the mast heads, used to support the mast.
Found on http://www.translationdirectory.com/glossaries/glossary101.htm

Backstays

Long lines or cables, reaching from the stern of the vessel to the mast heads, used to support the mast.
Found on http://en.wikipedia.org/wiki/Glossary_of_nautical_terms
No exact match found