Originally Posted by Channel Ribs
You will only get basic depth with the none M version, the Structurescan transducer is separate to the basic transducer and does not work at planing speeds. Structurescan is only for slow detailed scanning.
I would recommend getting the dual purpose (nine M) version with the standard transducer, with the option to add Structurescan and radar.
The M models are plotter only aren't they?
The HDS 5 and 7 come with a transducer, the HDS 8 and 10 don't, you have to order the transducer separately.
You need one transducer for your HDS unit.
The structure scan comes with its own transducer. Its a different shape and size to the HDS one. You'll need to fit them both.