f. Calculation method of maximum stacking layers

Each cargo has a maximum stacking layers value for each placement method.

1) "Compute stacking layers per cargo type": only restricts how many layers any single cargo placement can stack; there is no restriction across different cargo types.

2) "Cargo with the same stack code is treated as one type when computing stacking layers": restricts the total layers when different cargo types are stacked together; cargo with the same stack code is treated as one type. See Stack code above.

Example: many different-spec cargo items must be loaded with the requirement that all cargo, however stacked, must not exceed 5 layers. Set the same stack code for these cargo items and set the maximum stacking layers of each to 5, then choose "Cargo with the same stack code is treated as one type when computing stacking layers".