Man saved from dying at Folsom Lake

http://www.abc10.com/story/news/local/2015/12/20/folsom-lake-drowning/77681278/

"...two men were on a boat at Folsom Lake Friday and were dredging for a plane that had crashed during the 1960s.  For unclear reasons their boat overturned during their operations"

Inland waters, can I assume VHF radio could have prevented this?  I started carrying one this summer, thinking I wanted it for cold water emergencies among other reasons.

Does the Ranger or whoever operates the lake consistently monitor the radio?  Cell phone might a been more helpful in this situation. 

I believe this time of year there isn't anybody routinely monitoring VHF as well as VHF is (generally) line of sight type of operation.  I agree that cell would have been best & fastest for receiving help.

Very fortunate for sure. Glad they are okay.