单选题Vessels should not anchor or trawl in the vicinity of pipelines and are（）in the pipeline area shown on the chart.A Prohibit to anchorB Prohibited to anchorC Prohibited from anchorD Prohibited from anchoring

What measures should be taken if anchor dragging?

Vessels lying afloat at buoys for more than 24 hours should use anchor chain for ______ and insurance wire for ______.

A.bow mooring／stern line

B.forward spring／after spring

C.forward breast rope／forward spring

D.slip rope／stern line

They should take care of（锚链）___to ensure that they are in normal condition.

A.anchor chains

B.anchor ball

C.anchor gear

D.anchor ring

Why should you soak an anchor ________．

A.It can prevent the anchor from slipping during pretensioning

B.It will lubricate all the moving parts of a stock anchor

C.It will increase the maximum breaking strength of the anchor chain

D.It will make it easier to disassemble the anchor for repair

As these features are not all charted，special caution should be exercised ______ vessels navigating in the vicinity．

A.by

B.with

C.on

D.in

Acknowledgement by you of receipt of a distress message from a vessel which，beyond any possible doubt，is not in your vicinity and is a long distance away must be made when ______．

A.vessels nearer the distress vessel acknowledge receipt

B.vessels nearer the distress vessel fail to acknowledge receipt

C.even you have not received the distress

D.even the vessel in distress expressly prohibit you from providing any salvage service

They should take care of（锚）_____to ensure that they are in normal condition.

A.anchors

B.anchor ball

C.anchor gear

D.anchor ring

Before letting the anchor go, you should check that the ______.

A.chain is clear

B.anchor is clear of obstructions

C.wildcat is disengaged

D.All of the above