Im picking up a lowrance x4 fish finder and I wanted to do mount the transducer to shoot through the hull of my aluminum canoe.

First off, is reading through aluminum possible?
Secondly, the thread about this is archived so I can't read it.
Third, can I do it with the standard 60 degree reading external transducer or do I need a special one.
I plan on doing a silicone puck under the front seat if it's possible to read through aluminum and if I can use the basic transducer for that application.

I know basically nothing about how those electronics function, but I do know there can't be air bubbles in the silicone. Any input would be greatly appreciated!!!
Thanks in advance!