经谷歌搜索，与block fee有关的解释如下：

block fees means an amount of money paid by a tourist hunting company for the concession of a hunting area for a single hunting season; Sample 1.

（From Law Insider）

Block fees are fixed fees paid to lawyers for their work on specific activities or stages of an eligible criminal case.

（From Quora）

前者指的是tourist hunting company就某一狩猎季节的狩猎区域支付的费用，后者指的是就律师在某一刑事案件的特定工作或阶段支付的固定费用。很显然，这两者都不符合此处的语境。

因此，可以添加关键词，缩小范围，搜索“block fee + shipping”，结果如下：

The costs of ship surveys of ships with a class are usually settled between shipowner and classification society in, so called, block fee contracts.

If the ship classification contract is “pay-per-use”, all interventions are invoiced individually. In case of a “block fee” contract, the ship owner will agree with us on the eventual inclusion or exclusion of unscheduled interventions.

由前述定义，特别是第二处可知：如果船舶评级合同按次收费，那么所有的干预措施将单独收费；如果是block fee合同，则船东会与我们就包含或不包括意外干预措施进行约定。

再结合元照英美法词典中对于block一词的释义，如：

block policy综合保险单；总括保险单；统保单

承保被保险人所有财产的绝大部分风险的保险单。

可以得出，这里的block其实就是“总的”的意思，因而可以译为“打包收费/费用”。

以下为相关双语示例，供参考：

BLOCK FEES

打包收费

Company A will charge the Block Fees as set out in the Ship Schedule(s)

A公司将按船舶检验计划拟定的服务进行成打包收费。

Company A shall be entitled to terminate this Contract immediately or withdraw the classification and withhold certification of any ship referred to in this Contract at any time if the Client(s) fail(s) to make due payment of any Block Fee in accordance with clause 4 above after having received at least fifteen (15) days prior written notice of such failure.

如果客户在接到款项未支付的书面通知后十四（14）天内未能根据前文第4条的规定支付任何到期的打包费用，Company A有权随时立即终止本协议，或取消船级并停发本协议提及的任何船舶的证书。