Bill this Jackass.
How much per hour does it cost to run a Coast Guard Cutter, Helicopter, Divers, and Medical staff?
Every one of these trustfund thrillseeker jackasses should be billed for every man-hour, minute and second of all the resources spent saving their jack-asses.
Sounds like the icebreaker was just doing its thing and came across him out in the middle of the lake.
The salaries get paid anyway. The equipment is often is use anyway. Often, the rescue mission is actually good training for something bigger. Lighten up.