This is a bit dated as we now have an amazing array of navigation aids for any GA cockpit. Examples are Stratus ESG and Stratus 3, especially connected with ForeFlight for a robust glass cockpit or redundancy if you insist on steam instrumentation. These examples are just the tip of the iceberg in terms of what is offered by aviation vendors, big and small. Did I mention synthetic vision, 3D airport views, extension lines, breadcrumbs and on and on on actual VFR or IFR charts with appropriate Jepp plates where required. Oh, how about onboard instant (less than 15 minutes old in most cases) weather, bogey location, elevation and direction, etc.
Airplane Navigation From A to Z