Comparisons between observed and pre-calculated drafts will give an early indication of any possible de-ballasting or ballasting problems or discrepancies in the loading plan. If there are any large variations between the observed draft and the pre-calculated draft, this should give reason for concern, as stress levels SF & BM might be higher than those pre-calculated.

Therefore, it is important that at the end of each pour or run the observed draft is entered on the load/discharge form and compared to the calculated draft. Any omissions on the load/discharge form may result in a non conformity under the ISM Code and also increase the risk of higher shear forces and bending moments.

散货监管

将吃水观测值和吃水估算值两者进行比较，得出的结果可以较早地反映出可能出现的卸压舱和压舱问题或积载图不符点。如果吃水观测值与吃水估算值有较大的差异，就应该引起注意，因为应力水平中剪力和弯柜数值可能会高于估算值。

因此，确保在每次注入或排出压舱水后把吃水观测值记录到装/卸表上并且与吃水估算值进行比较是非常重要的。装/卸窗体上的项目的任何缺漏都是不符合《国际安全管理条例》的，同时也会增加使剪力和弯矩值增高的风险。