Large-scale vessels are maritime transport instruments that are inseparable from the use of steel components. In this industry, the construction or ownership of vessels frequently involves cooperation between Limited Liability Companies (PT) formalized through a contract or agreement. However, during the execution of the procurement agreement for steel-lifting heavy equipment (ship rail crane), the risk of breach of contract may arise when one party fails to fulfill its obligations. This study aims to identify and understand the legal regulations regarding breach of contract under Indonesian positive law, and to analyze the legal liability of the parties involved in the ship rail crane agreement based on Decision Number 519/Pdt.G/2020/PN Jkt.Sel.
This study employs a normative juridical research method with a case study approach. The results indicate that the judges' consideration clearly stated that PT Istaka Karya (Persero) as the Defendant had committed a breach of contract. The Defendant's failure to respond to multiple cease-and-desist letters (somasi) issued by the Plaintiff demonstrated bad faith that resulted in financial losses for the Plaintiff. Based on the decision, the Defendant is ordered to settle and fulfill its legal obligations in accordance with the previously agreed contract.