In determining if risk of collision exists， such risk may sometimes exist even when an appreciable bearing change is evident， particularly when approaching ________ ．

先生们： 

兹告知，我轮无线电发射机因损坏而需修理。若您能尽快安排一名无线电技师来船修理，我将不胜感激。 

船长

先生们：

本人通知您，拟在贵港卸下的货物中有10箱各重为38吨的机械，提单号为110～115。由于这些货物超出了我船的卸货能力，本人请您与上述公司联络，利用他们自己的设备于本月6日1000时将这些货物卸下。

船长

This paragraph is a ______ ．

The eye is more ______ than radar．

This is a ______ ．

DISCRIMINATION means the ______ ．

材料：What advantages does the eye have over the radar ？The eye has the following advantages：Reliable 

Sensitive to color 

Can assess heading 

Can identify small targets 

Can see light configurations 

Can assess ship types 

Can identify conspicuous marks 

Can identify flashing lightsHas better discrimination 

Can see changing weather patterns 

Can see effect of sea on vessel 

Not affected by blind arcs (if observer moves)．

问题： BLIND ARCS mean ______ ．

The contract of affreightment is referred to ______ ．

At the substituted port, the carrier is entitled to ______ freight if he had dilivered full cargo there．

材料：If，by reason of or in compliance with any such directions or recommendations，the vessel does not proceed to the port or ports named in the Bill of Lading or to which she may have been ordered pursuant thereto，the Vessel may proceed to any port as directed or recommended or to any safe port which the Owners in their discretion may decide on and there discharge the cargo．Such discharge shall be deemed to be due fulfillment of the contract of affreightment and the Owners shall be entitled to freight as if discharge had been effected at the port or ports named in the Bill of Lading or to which the Vessel may have been ordered pursuant thereto．

问题：If the vessel does not, under the directions of the Charterer, proceed to the port or ports named in the Bill of Lading or to which she may have been ordered pursuant thereto to, she may proceed to all the following ports except ______ ．