It should be about 12' long and tied to the mast post. I used to tie mine to the mast post just under the mast ball and store it on a pocket in the trampoline. If you find yourself capsized, get the line out of the pouch and throw it over the top hull so that it falls down the bottom side of the cat. Use it to lean out....

There are other nuances to righting the boat too....briefly; be sure to try and orient the bows so they are roughly pointing into the wind. Sometimes you have to stand out on, and submerge, the bows to get the boat to pivot properly.