Having a second person on the chase boat is good. Having a second person who is cat sailor is better. This person will know where the chase boat needs to be possitioned to assist in righting or be able to go in the water to assist in righting the boat. I have had circumstances where that person was needed to sail the boat back to shore because the crew and skipper became incapacitated.
Safetly gear on the chase boat(besides tow lines, flags, multiple radios, fenders) should always include vest,gloves and possibly a harness(helps when righting boats).