RE: furuno navpilot 511
The Furuno pilots are equivalent to the Simrad AP20 series, not their AP11.
AP20 with RPU160 = $4650. NavPilot500 with HRP16 (same as 160) = $3,795.
AP22 with 160 = $4225. NavPilot511 with HRP16= $3295.
That sounds like less to me.