What would I need to run two units off my trolling motor mounted transducer ? I have a Hummingbird 1199 SI and a Helix 10 SI .Will use one for maps mainly and other for SI and sonar . This will save button pushing while fishing unless I want to mark something . I will have a Helix Megs 12 SI linked to one off the ones in front also . The one on console for searching while at the big motor . .
