A new addition to GHS software, the Crane Module, helps naval architects charged with calculating the complicated effects of a crane's performance on barges. Although the Crane Module is useful for modeling any crane, it is especially powerful in modeling large cranes with multiple hooks mounted on a barge or ship. "Crane manufacturers give a limit to the amount of machine list allowed as the boom lifts and/or rotates," explained Ed Glowacki, owner of Glowacki Engineering, an engineering consulting firm in Florida specializing in naval architecture, "and these cranes are designed to operate on virtually level ground." Glowacki's consulting firm is often called upon to create a modified crane chart for cranes installed on ships and barges – surfaces that are anything but level.