If all navigation lights are controlled by one switch, how are they likely connected?

The navigation lights in an aircraft are typically connected in parallel to each other and in series with the switch. This configuration allows all the lights to operate independently while still being controlled by a single switch. If the lights were wired in series with one another, turning off any single light would break the circuit, preventing the rest from illuminating. However, by wiring them in parallel, each light maintains its own path to the power source, ensuring that they can all function simultaneously even if one light fails. The switch, in this case, is in series with the entire parallel setup, controlling the flow of power to the lights as a whole.

This design balances function and safety, as it allows for both the ease of controlling multiple lights with one switch and the reliability of continued operation of the other lights in the event of a malfunction in one of them.