31. 题干： 直航船采取最有助于避碰的行动，这意味着两船：

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？

A helmsman receives the command “Right 15 degrees rudder”. The helmsman＇s IMMEDIATE reply should be ________.