30. 题干： 当直航船发觉两船不论由于何种原因逼近到单凭让路船的行动已经不能避免碰撞时，也应采取最有助于避碰的行动，这意味着：

The ship has a speed of more than 14 ______ at 120 ______.

It takes about 12 seconds to reverse ______ full speed ahead ______ full speed astern．

In anchoring orders, walk back the chain means ______.

Hard right rudder means ______．

You are getting closer to the vessel ______，which is on the same course as you．

______？Two degree on starboard．

If two mooring lines are to be placed on the same bollard, which method is best?

A spring line leads _______．

A vessel moored with two anchors，sometimes，at an exposed roadstead to _____.

Which one of the following anchor orders is uncommon term for using？