A deck mounted tow line removes the need for a waist worn version, meaning the boat takes the strain during towing sessions not you and your back.
This neat bag form Valley is usually mounted within reach on the back deck. There is 15m of floating braided cord, stainless steel clips, floats and a shock absorbing system all packed up ready for deployment. The bag is attached to the deck with velcro strips so it releases on load. A great choice for those who don't want to wear a waist worn version.