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