how long have you been running the engine to charge the batteries? will the voltage rise if you charge one battery for a while? i expect the voltage will not rise for a while because the batteries were so low. are you at a dock where you can use a charger? how did you get the engine started in the first place? if you are at anchor it will take a long time to fully charge the batteries.
Liberals are people who care about others. Freethinkers are not constrained by the myths of religion.