Being a canoeist, I already have a throw rope as req'd by law. The many boaters on here no doubt have at least 1 as well. I'd recommend carrying 1 each when 2 or more are ice fishing, esp on dicey ice like we have right now.
If you don't have 1 I suggest a proper throw rope rather than 1 of those el cheapo sold at Can Tire to fulfill the min legal req'mts.
Stay safe out there!