Most lightships have been replaced by lit buoys or other structures. It has pivoting flukes that dig into the ground as tension is placed on the anchor. It does not have a stock . A hole in between compartments in the bottom of the boat to allow water to flow into the bilge where it is sent overboard . On a boat most ropes are called lines.
Propane is a common fuel used for cooking and heating.
Propane is more easily available throughout the world than CNG however, so it is used for most boats outside of North America. A leaning to one side when not underway. Usually the result of an improperly loaded boat. Heeling is different from a list because it is caused by the forces of wind acting upon a sailboat that is underway. When a boat changes tacks , the direction of the heel will change sides, whereas a list is a continual leaning to the same side under any condition.