My suggestion is to NOT leave you boat when your buddy capsizes.

Instead, sail over to his mast and grab the top of his mast. When he is ready to right the boat, you gently lift the mast and then toss it in the air and give him the little boost that he needs to right his boat.

We did a coaching session with Randy Smyth one time and I capsized. Randy grabbed the top of my mast and gave it a little lift from the small motor boat he was in and the boat came up easier than I have ever experienced.

If you think about how much more leverage you can provide by lifting the mast, you can much easier and much more safely assist your buddy.

This way you dont have to think about leaving your boat unattended.

Bill