Na-613d Manual — Nako

A: Yes – use a 4–8 ohm speaker via the external speaker jack (usually 3.5mm or 2-pin connector).

If you cannot locate a free PDF, consider purchasing a used manual from online marketplaces or contacting a marine electronics repair shop – they sometimes have internal service documents. Need specific help? Write down any button labels or the serial number on the back of your NA-613D, then post on a marine electronics forum like The Hull Truth or Panbo. nako na-613d manual

A: It likely activates Triple Watch (monitors channel 16, 9, and a priority channel). A: Yes – use a 4–8 ohm speaker