anyone recognise this transducer?

[groundhog]

It has a number stamped on it, WT-20 A.

Which way is front and back?

[groundhog]

Does it matter if it is a fishfinder or depth transducer?
Are they the same thing?

How do you make a fairing block?

Why is it such a weird shape?
Do those protrusions assist it's operation?
What if I cut them off?

[kompressor]

Hello,
I was wondering if you ever found out anything about the transducer.
I acquired one and I know nothing about it.
If you happen to know anything, even a brand name of a mating sonar/ fish finding unit. that would be great. I will also let you know if I find anything.
Thanks,
Isaac

[kompressor]

Mine has a angle bracket, and it looks like it was mounted square edge facing the bow.