Newmar NP-12 Nav-Pac - 12V [NP-12]NP 12 Nav Pac 12V Marine communication and navigation electronics such as programmable data transceivers, GPS, and other microprocessor controlled devices require clean and steady DC input power. Their sensitive circuitry is highly vulnerable to voltage drops from engine starts, noise and line spikes from alternators and motors, and noise from various other electronic devices. NAV PAC prevents these conditions from affecting electronics. Features: