Run a line from stanchion to stanchion
When installing similar netting on my 27, I wanted to avoid drilling into the deck and creating possible areas of seepage. Instead I tied a line along the bottom of each stanchion and wove it through the bottom of the netting. With sufficient tension there was minimal space between the netting and the deck. I found that for my purpose, keeping small children on deck and my wife appeased, the space was acceptable. Depending upon your needs, it may not be. I would experiment with it though before drilling into the deck, particularly if you envision removing the netting at some point.