The heavy duty RTC20C is functionally identical to the RTC15C but features a stout graphite-polyester housing, flush mounted LED command indicators, and stainless steel, piezoelectric switches that will not leak or gum-up.

The RTC20C is wash-down proof and is a good choice for installations where the steering control will be left out in the weather. The RTC20C is compatible with the ComNav 1001, 2001, 1101, and 1201 automatic pilots.