From Steve Redick:

I came into something really special. These photos are dated April 19, 1961 near the old fire academy. They are testing the feasibility of putting a second turret on the Snorkel basket, and it’s my dad in the basket! (wearing glasses) He was assigned to Snorkel 2 at the time and I remember him talking about how the 2-gun Snorkel (snorkel 5) never really worked well as they could not properly supply both turrets. Dad was only 33 years old at the time of the photo. Many thanks to my friend who found these photos.
Vintage photo from April 19, 1961 of Chicago FD Sni=orkel 2 testing a second gun in the basket
 
Vintage photo from April 19, 1961 of Chicago FD Sni=orkel 2 testing a second gun in the basket
 
Vintage photo from April 19, 1961 of Chicago FD Sni=orkel 2 testing a second gun in the basket