Now I mostly have been towed on my TheMightyHobie18 ... but I've helped tow H16's .....

I use a bridle system w/ a "long" tow line (50' min) as mentioned above .... on a H16 we tie the bridle to the corner posts/castings ..... I've seen bent dolphin strikers when tied there .... a single line to the mast is Ok for short distances and be sure to proceed at slow speeds .... but w/ a H16, if the rig is to loose I worry about "popping" the base of the mast out ... and from there things will get ugly fast!!!! I wrap the towline around the front crossbar at the mastbase ...

Now the nice thing about a bridle is that when adjusted right a catamaran will tow straight and need very little steering input .... so I use one for longer and (slightly) faster towing .... keep a good watch ... but you will find you can eat a sandwich ... and drink a beverage .... you should be sitting as far aft as possible and balancing the boat side-to-side also ...

AND ... just like towing a water skier ... the "towboat" MUST maintain a "watch" on the boat they are towing

...And once you tie a "rope" to a boat ... it's a "line" ...

Harry
H18mag/P19MX