<p style=”text-align: left;”>Will do Paul, thanks.</p>

<p style=”text-align: left;”>Thanks Ross, that’s very helpful.  I do have radar and a chart with its own display.  I have an old Lorentz chart plotter which runs cmap nt+ and is linked to a tv monitor.  There is a separate depth sounder outside in front of the wheel along with a Raymarine wind instrument.</p>
My thoughts were that I could use the laptop linked to the tv monitor with some flash charts from Navionics to have a big display. I thought I could add a dedicated fish finder to show the state of the bottom.  To get a big screen chart plotter which is what I think you mean as an MFD, would cost a fair bit more. Am I better to get it all in one or have separate units so that I don’t lose everything if it malfunctions?