Old 03-21-2019, 08:26 AM
Senior Member
Join Date: Nov 2006
Location: Kent Island, MD
Posts: 2,037

Looks like they are using the Aux. Bat. to run a high draw item (in this case a bow thruster). Having the extra switch isolates the Aux and at the same time allows to them to tie in the House Bat if needed. Looks like a good option to me.
mikie is offline