Which type of calculation does Type 1 stability instrument software perform?

The correct response reflects that Type 1 stability instrument software is designed primarily to calculate intact stability only. This type of software focuses on assessing the stability of a vessel when it is undamaged and fully intact. Intact stability refers to the ability of a ship to return to an upright position after being heeled by external forces such as wind or waves without any significant loss of buoyancy or structural integrity.

Intact stability calculations typically involve evaluating factors such as metacentric height, righting levers, and stability curves to ensure that the vessel remains seaworthy under normal operating conditions. These calculations are essential for ensuring safety during the vessel's operations, particularly in determining how the ship will behave in various loading conditions and sea states.

The other options pertain to different aspects of stability calculations. Damage stability checks are focused on how a vessel performs when it has sustained damage that compromises its buoyancy, and these would not be covered under Type 1 stability instruments. Likewise, calculating both intact and damage stability would require more comprehensive software capabilities. Lastly, while cargo weight distribution is a critical component of stability, it falls under operational practices that affect stability rather than being a specific function of Type 1 stability instrumentation. Thus, the emphasis on intact stability ensures a clear