Even if VFR a map is a must, never trust any electronic gadget 100%. Even with
redundant systems there is a potential loss of electrical power.

DeltaDeltaDelta wrote:

Do you people with GPS units (either panel mounted or portable) use only
them when you fly, or do you plan the same route on a map as well and plot
your position in flight, for backup in case the unit looses pickup? I've
recently seen the SR-22 panel and some Lancair models and it got me
wondering whether aside from all these hi-tech gadgets people still use the
good old roadmap.

Triple Delta