Magicpaddler wrote on Jan 6^th, 2018 at 1:19am:

Depends on your tripping style.  If you mount the display unit then it works better to mount the transducer.  If you pack the display unit away for portages then some way to put a little water between the transducer and the floor of the canoe probably works best. I like Old salts method. I mount the display, batteries and transducer at home and it is still there when I get back home.

Old Salt: "I don’t mess with water in a bag. My puck dryfoots it. I just glue it to the floor of canoe with a thin layer of silicone caulk, being sure to work air bubbles out. Makes it easy at portages, just turn it off, rotate head, and tell your son to pick it up and meet you on other side."
some silicone tube labels mention 'quick set' (3 hrs), don't recall the brand(s). i've leaned toward using those.