Hey Axeman...
Amobeus is correct in stating that Todd Shannon Sr used to dive the Sligo on a regular basis. The dives used to be done on a small 8 man zodiac out of Humber Park West.
The obligation of the Wednesday night dives was done in the zodiac and the sign up was completed solely at Aqua-Systems. We used to meet at the dock at 6:00 pm for the first dive and then when the weather was good we used to complete a second night dive. I was divemaster on the boat on a few occasions in my first years as a cert. divemaster.
When I was first introduced to scuba MDS was responsible for the OW weekends in Midland, on the Orkney Isle, as well as arranging the pool on Tuesday nights. There were 2 zodiacs, one stored at either Todd Sr's home or MDS. The second was stored at the rear of Oakville Diver's. Sr used to leave the store to P/U the zodiac and meet at the park.
Todd Jr has only done this dive for this summer, using the new boat. Last summer there were no dives done on the Sligo by Sr or Jr due to an illness in the family.
Dive safe,
dmdoug