4.操縱性試驗 Maneuvering test4.1回轉(zhuǎn)試驗 Turning test (Only for first vessel/僅首制船)4.2Z形操縱試驗 Z-Maneuvering test (Only for first vessel/僅首制船)4.3急停倒車/正車試驗 Crash stop astern test and ahead test急停倒車試驗是為了證明主機(jī)能適應(yīng)船舶的應(yīng)急停止的能力和了解從下令緊急停車直至船舶航速降至零為止的時間和距離