why is it called a boom on a sailboat

IMAGES

1. "Boom Of Sailboat Sailing At Sea" by Stocksy Contributor "Matthew Spaulding"

   

2. Sailboat Boom Stock Photo

   

3. Buy Boom For Sailboat, St. Thomas, USVI

   

4. Sailboat Boom Stock Photos, Pictures & Royalty-Free Images

   

5. Things You Never Thought to Ask About the Boom on Sailboat

   

6. Things You Never Thought to Ask About the Boom on Sailboat