# Running backstay

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A **running backstay** is a rigging component on a sailboat which helps support the mast.[1][2] A running backstay runs from each lateral corner of the [stern](/source/Stern) to the mast at the level where the [forestay](/source/Forestay) begins in the fractional rig. Because they are attached low on the mast, they can present a significant problem in an accidental [gybe](/source/Jibe), as the boom hits the stay, with the possibility of breaking the boom, mast, or both.

During [beating](/source/Sailing#Beating_or_.22working.22) or [reaching](/source/Reaching_(sailing)), the running backstay in [windward](/source/Windward) side is in tension. The one in the [leeward](/source/Leeward) side is lazy. As the boat tacks they change over. Another function of the running backstay is to adjust the tension of the forestay to suit the sailing angle and sea condition. In general, during a hard beat when the boat sails very close to the wind, the running backstay is tightened to increase the tension of the forestay. The [genoa](/source/Genoa_(sail)) is sheeted in. Under these conditions, the [draft](/source/Draft_(sail)) of the genoa is brought forward reducing the [drag](/source/Drag_(physics)).

## References

1. ["How to set up running backstays on your sailboat | Cruising World"](https://www.cruisingworld.com/how/backstays-future/). *www.cruisingworld.com*. 2013-03-28. Retrieved 2024-02-22.

1. Textor, Ken (1995). [*The New Book of Sail Trim*](https://books.google.com/books?id=2JIbS0c1XPwC&dq=Running+backstay&pg=PA104). Sheridan House, Inc. ISBN 978-0-924486-81-4.

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