单选题Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a （）.A red triangle with the letter RB white triangle with the letters RGC green square with the letter GD white square with the letters GR

Entering from sea，a daymark on the port side of the channel would be indicated on a chart by a ______.

A.red triangle with the letter R

B.white triangle with the letters RG

C.green square with the letter G

D.white square with the letters GR

A stretch where the channel changes from one side of the river to the other is called a ______.

A.bifurcation

B.transit

C.crossing

D.changeover

Keep the NO1 (浮标) on the port side!

A.buoy

B.mark

C.beacon

D.channel

材料：

When SEA EMPRESS was two or three cables from the Channel entrance，the pilot saw from the changing aspect of the Outer Leading Lights that there was a set to the east．He ordered a course change of 5° to port．The vessel，which was now closing with the Mid Channel Rocks Light Buoy，started to turn to port．The pilot saw the Outer Leading Lights close and then open to the east as the bows entered the channel．The Buoy was very close to starboard and the pilot now saw that the fixed red and fixed white lights of the Outer Leading Lights，the ones indicating the east side of the deepest water in the Channel entrance，were also open to the east．

After the bows had passed the Middle Channel Rocks Light to starboard there was a shuddering vibration，then a sound from the deck below of liquid being forced under pressure，accompanied by a strong smell of oil．The helmsman reported that the vessel was not steering and the pilot ordered&39; full astern&39;．The Chief Officer recorded this order and the vessel&39;s position，which was 1.4 cables northwest of Middle Channel Rocks Light．

SEA EMPRESS，which was trimming by the head and taking a starboard list，continued to run ahead as the main engine was on full astern．There were further main engine movements and the vessel finally lost all way after she grounded again in a position about 3.3 cables south-by-west of the Mill Bay Buoy．The main engine was put to &39;stop&39;．SEA EMPRESS was by this time significantly trimmed by the head and had taken an 18° list to starboard with the starboard fore part of the deck awash and was heading in a northwesterly direction．

问题：

The course of SEA EMPRESS，when entering the Channel entrance，was most likely in a direction of ______．

A.North

B.East

C.South

D.West

When SEA EMPRESS was grounded the second time，her smallest freeboard was on her ______．A.port side before mid section

B.port side after mid section

C.starboard side before mid section

D.starboard side after mid section

A conclusion can be drawn from this passage that SEA EMPRESS was grounded at about ______ hours（LT）．A.0200

B.0900

C.1900

D.2200

“The pilot saw the Outer Leading Lights close and then open to the east as the bows entered the channel”．This indicates that ______．A.the front Leading Light appeared to move to the left of the rear Leading Light

B.the rear Leading Light appeared to move to the right of the front Leading Light

C.the front Leading Light appeared to move to the east of the rear Leading Light

D.the rear Leading Light appeared to move to the east of the front Leading Light

请帮忙给出每个问题的正确答案和分析，谢谢！

What is required to be entered into the Official Logbook?

A.Opening a sideport at sea to renew a gasket

B.The annual required stripping and cleaning of the lifeboats

C.The biennial weight test of the lifeboats and falls

D.The drafts on entering port

You are entering an east coast port and see a buoy with a yellow triangle painted on it．This indicates ______．

A.you are in the vicinity of the ICW

B.the buoy is a special mark

C.the buoy is off station

D.the buoy designates a sharp turn in the channel

A red triangular daymark marks ______.

A.the centerline of a navigable channel

B.the starboard side of a channel

C.a prominent object of navigational interest that has no lateral significance

D.an area of a channel where passing another vessel is permitted