OpenMarine

We have configured the Raspberry 3 with the original system that comes on the SD card.

We writte the openplotter with the Raspberry Pi Imager and it does not start (the green light does not turn on). We have done it with a new SD card and it doesn't work either.

Does the Raspberry have to be formatted in any way other than changing the SD card?

You don't need to do anything to the Raspberry Pi itself, just install a correctly imaged SD card. It is puzzling why it doesn't work for you.

Which OP image are you using?