This from Max Weingardt:

Highland Park Fire Department with Northbrook, Park Ridge, and Winnetka Dive Training

Highland Park FD dive rescue unit

Max Weingardt photo

Highland Park FD divers

Max Weingardt photo

fire department divers in Lake Michigan

Max Weingardt photo

Winnetka FD Utility 28

Max Weingardt photo

E-ONE heavy rescue squad

Max Weingardt photo

ambulance converted for fire department divers

Max Weingardt photo