You should be able to get a depth reading at this speed and much faster. If you're not, it's often a problem with the way the transducer is mounted, maybe a problem with the transducer itself. Swing by this board
The Hull Truth
especially the Electronics board for specific help. This question comes up a lot, so try a search first.
Fuzzy
The Hull Truth
especially the Electronics board for specific help. This question comes up a lot, so try a search first.
Fuzzy