My dear husband tells me that one can buy small gizmos to put on a boat and make it detectable to radar. That sounds like a good idea too.

I want to add that I admire the courage of the leader of the kayakers, who set out rescuing people even though he had a dislocated shoulder. Both my mother and my sister have suffered dislocated shoulders from falls, and they tell me the pain is simply terrible.

He also says that a factor in the five sunk boats in the Lake Travis parade is that no doubt many of the boats were in shallow water. Waves that start in deep water (the original river channel) and go into shallow water (the drowned floodplain) get taller as they approach shore. Since Lake Travis is a reservoir created from a broad river valley, it probably has lots of shallow water.

Good for you for reporting the hostile boater to the Coasties.