Tretter says the players' union had two primary goals in running the survey and giving each team letter grades.
特雷特表示，球员工会进行调查和给每支球队打分有两个主要目标。
英语百科
Running survey
A running survey is a rough survey made by a vessel while coasting. Bearings to landmarks are taken at intervals as the vessel sails offshore, and are used to fix features on the coast and further inland. Intervening coastal detail is sketched in.
The method was used by James Cook, and subsequently by navigators who sailed under—or were influenced by—him, including George Vancouver, William Bligh and Matthew Flinders.