What is needed to correct an angle of Loll effectively?

To correct an angle of Loll effectively, it is crucial to increase the vertical center of gravity (KG) by loading weight low down. An angle of Loll occurs when a vessel has a negative metacentric height (GM), meaning it is unstable and tends to lean to one side. A low KG, related to the distribution of weight, can help restore stability.

When weight is loaded low in the vessel, it lowers the center of gravity (KG), which can enhance the metacentric height (GM). This adjustment provides the vessel with greater stability and helps to eventually return it to an upright position. By concentrating weight lower in the vessel's hold, the entire system's balance shifts, fostering a more favorable condition for stability.

The other options do not effectively address the fundamental issue of stability associated with an angle of Loll. For instance, loading weight on the high side would exacerbate the problem, as it would create a larger lean to that side. Checking if the heel is due to positive GM is more of an assessment than a corrective action. Changing the course of the vessel might not be a viable or effective solution, as it does not inherently resolve the stability issues at hand.