The Orca heirloom beans are also called Calypso, Yin-Yang and Vaquero. I cooked these beans with water, garlic, cumin and salt. And used the pressure cooker.
You can cook the orca beans on the stove using a conventional pot however it will take more than 2 hours for them to be ready. Same applies if decided to use a slow cooker. You can cook them there bit will take long hours.