请翻译该轮本准备在卸货期间更换船旗但是由于事故发生在更换船旗前船级社需要在修理完成后才能继续更换船旗。根据代理消息相关更换船旗手续最终于28日1450hrs完成。由于等sailing channel该轮最终于当日1930时离开。

The ship was supposed to change its flag during the unloading period of this round, but due to an accident that occurred before the flag change, the classification society needs to wait until the repairs are completed before proceeding with the flag change. According to the agent's message, the necessary procedures for changing the flag were finally completed at 14:50 on the 28th. Due to waiting for the sailing channel, the ship finally departed at 19:30 on the same day.