相关题目
The need for prudence when flying through known areas of forecasted severe weather is well recognized. Presently, ATC procedures call for controllers to assist pilots, particularly when operating on IFR flight plans, in avoiding known areas of severe weather. It is impor tant to remember, however, that there are limitations to an air traffic controller＇s capability for providing such assistance. The controller’s primary responsibility is to provide safe sepa ration between aircraft. No additional services can be given which distract or derogate from that primary responsibility. Additionally, ATC radar equipment, communications conges tion, and traffic may also limit and reduce a controller’s ability to provide any additional service. To a large degree, the assistance that might be given by air traffic control depends upon the weather information available to controllers through weather reporting channels or by pi lots actually requesting to avoid severe weather areas. Because severe weather is extremely transitory in nature, the information available to controllers may be of only limited value, if any – unless frequently updated by pilot reports or radar weather information. In-flight reports from pilots in direct communications with controllers can give vital weather information. Pilots wishing to avoid severe weather along the route should request deviations from route and/or altitude as far in advance as possible. Obtaining clearance to avoid severe weath er can often be accommodated in the en-route areas, away from terminal areas, because there is less traffic congestion. In the terminal areas, ATC coordination is complicated by complex departure routes and adjacent airports. Consequently, controllers are less likely to be able to accommodate requests for weather detours. ATC also has other problems in handling the weather. Under certain conditions, echoes received from precipitation render ATC radar unusable because of clutter. To avoid disruption in radar service, modifications have been made too many radars to reduce precipitation clutter. This feature is known as circular polarization. Terminal radar systems use this feature to reduce clutter during moderate to heavy rain or snow storms in order to keep track of traffic. This necessary process, however, means the controller does not always see the weather on the radar scope. Moreover, if ATC is using a secondary radar system, the controller’s scope displays only those signals emitted by the airborne radar beacon transmitters. With this sys tem the radar scope does not display weather echoes at all. The controllers can, however, be alerted to turn on their normal radar to observe weather, provided this will not result in weather cluttering, rendering the scope unusable for air traffic control. The point to re member is that pilots should realize that the controller’s weather information is often far from complete.5.Which of the following is true? C.
The need for prudence when flying through known areas of forecasted severe weather is well recognized. Presently, ATC procedures call for controllers to assist pilots, particularly when operating on IFR flight plans, in avoiding known areas of severe weather. It is impor tant to remember, however, that there are limitations to an air traffic controller＇s capability for providing such assistance. The controller’s primary responsibility is to provide safe sepa ration between aircraft. No additional services can be given which distract or derogate from that primary responsibility. Additionally, ATC radar equipment, communications conges tion, and traffic may also limit and reduce a controller’s ability to provide any additional service. To a large degree, the assistance that might be given by air traffic control depends upon the weather information available to controllers through weather reporting channels or by pi lots actually requesting to avoid severe weather areas. Because severe weather is extremely transitory in nature, the information available to controllers may be of only limited value, if any – unless frequently updated by pilot reports or radar weather information. In-flight reports from pilots in direct communications with controllers can give vital weather information. Pilots wishing to avoid severe weather along the route should request deviations from route and/or altitude as far in advance as possible. Obtaining clearance to avoid severe weath er can often be accommodated in the en-route areas, away from terminal areas, because there is less traffic congestion. In the terminal areas, ATC coordination is complicated by complex departure routes and adjacent airports. Consequently, controllers are less likely to be able to accommodate requests for weather detours. ATC also has other problems in handling the weather. Under certain conditions, echoes received from precipitation render ATC radar unusable because of clutter. To avoid disruption in radar service, modifications have been made too many radars to reduce precipitation clutter. This feature is known as circular polarization. Terminal radar systems use this feature to reduce clutter during moderate to heavy rain or snow storms in order to keep track of traffic. This necessary process, however, means the controller does not always see the weather on the radar scope. Moreover, if ATC is using a secondary radar system, the controller’s scope displays only those signals emitted by the airborne radar beacon transmitters. With this sys tem the radar scope does not display weather echoes at all. The controllers can, however, be alerted to turn on their normal radar to observe weather, provided this will not result in weather cluttering, rendering the scope unusable for air traffic control. The point to re member is that pilots should realize that the controller’s weather information is often far from complete.4.According to the passage, the ATC radar is unusable because of （ ） .
The need for prudence when flying through known areas of forecasted severe weather is well recognized. Presently, ATC procedures call for controllers to assist pilots, particularly when operating on IFR flight plans, in avoiding known areas of severe weather. It is impor tant to remember, however, that there are limitations to an air traffic controller＇s capability for providing such assistance. The controller’s primary responsibility is to provide safe sepa ration between aircraft. No additional services can be given which distract or derogate from that primary responsibility. Additionally, ATC radar equipment, communications conges tion, and traffic may also limit and reduce a controller’s ability to provide any additional service. To a large degree, the assistance that might be given by air traffic control depends upon the weather information available to controllers through weather reporting channels or by pi lots actually requesting to avoid severe weather areas. Because severe weather is extremely transitory in nature, the information available to controllers may be of only limited value, if any – unless frequently updated by pilot reports or radar weather information. In-flight reports from pilots in direct communications with controllers can give vital weather information. Pilots wishing to avoid severe weather along the route should request deviations from route and/or altitude as far in advance as possible. Obtaining clearance to avoid severe weath er can often be accommodated in the en-route areas, away from terminal areas, because there is less traffic congestion. In the terminal areas, ATC coordination is complicated by complex departure routes and adjacent airports. Consequently, controllers are less likely to be able to accommodate requests for weather detours. ATC also has other problems in handling the weather. Under certain conditions, echoes received from precipitation render ATC radar unusable because of clutter. To avoid disruption in radar service, modifications have been made too many radars to reduce precipitation clutter. This feature is known as circular polarization. Terminal radar systems use this feature to reduce clutter during moderate to heavy rain or snow storms in order to keep track of traffic. This necessary process, however, means the controller does not always see the weather on the radar scope. Moreover, if ATC is using a secondary radar system, the controller’s scope displays only those signals emitted by the airborne radar beacon transmitters. With this sys tem the radar scope does not display weather echoes at all. The controllers can, however, be alerted to turn on their normal radar to observe weather, provided this will not result in weather cluttering, rendering the scope unusable for air traffic control. The point to re member is that pilots should realize that the controller’s weather information is often far from complete.3.The controllers are more likely to clear the pilots to detour severe weather en route just because （ ） .
The need for prudence when flying through known areas of forecasted severe weather is well recognized. Presently, ATC procedures call for controllers to assist pilots, particularly when operating on IFR flight plans, in avoiding known areas of severe weather. It is impor tant to remember, however, that there are limitations to an air traffic controller＇s capability for providing such assistance. The controller’s primary responsibility is to provide safe sepa ration between aircraft. No additional services can be given which distract or derogate from that primary responsibility. Additionally, ATC radar equipment, communications conges tion, and traffic may also limit and reduce a controller’s ability to provide any additional service. To a large degree, the assistance that might be given by air traffic control depends upon the weather information available to controllers through weather reporting channels or by pi lots actually requesting to avoid severe weather areas. Because severe weather is extremely transitory in nature, the information available to controllers may be of only limited value, if any – unless frequently updated by pilot reports or radar weather information. In-flight reports from pilots in direct communications with controllers can give vital weather information. Pilots wishing to avoid severe weather along the route should request deviations from route and/or altitude as far in advance as possible. Obtaining clearance to avoid severe weath er can often be accommodated in the en-route areas, away from terminal areas, because there is less traffic congestion. In the terminal areas, ATC coordination is complicated by complex departure routes and adjacent airports. Consequently, controllers are less likely to be able to accommodate requests for weather detours. ATC also has other problems in handling the weather. Under certain conditions, echoes received from precipitation render ATC radar unusable because of clutter. To avoid disruption in radar service, modifications have been made too many radars to reduce precipitation clutter. This feature is known as circular polarization. Terminal radar systems use this feature to reduce clutter during moderate to heavy rain or snow storms in order to keep track of traffic. This necessary process, however, means the controller does not always see the weather on the radar scope. Moreover, if ATC is using a secondary radar system, the controller’s scope displays only those signals emitted by the airborne radar beacon transmitters. With this sys tem the radar scope does not display weather echoes at all. The controllers can, however, be alerted to turn on their normal radar to observe weather, provided this will not result in weather cluttering, rendering the scope unusable for air traffic control. The point to re member is that pilots should realize that the controller’s weather information is often far from complete.2.Which of the following is the most valuable weather information?
The need for prudence when flying through known areas of forecasted severe weather is well recognized. Presently, ATC procedures call for controllers to assist pilots, particularly when operating on IFR flight plans, in avoiding known areas of severe weather. It is impor tant to remember, however, that there are limitations to an air traffic controller＇s capability for providing such assistance. The controller’s primary responsibility is to provide safe sepa ration between aircraft. No additional services can be given which distract or derogate from that primary responsibility. Additionally, ATC radar equipment, communications conges tion, and traffic may also limit and reduce a controller’s ability to provide any additional service. To a large degree, the assistance that might be given by air traffic control depends upon the weather information available to controllers through weather reporting channels or by pi lots actually requesting to avoid severe weather areas. Because severe weather is extremely transitory in nature, the information available to controllers may be of only limited value, if any – unless frequently updated by pilot reports or radar weather information. In-flight reports from pilots in direct communications with controllers can give vital weather information. Pilots wishing to avoid severe weather along the route should request deviations from route and/or altitude as far in advance as possible. Obtaining clearance to avoid severe weath er can often be accommodated in the en-route areas, away from terminal areas, because there is less traffic congestion. In the terminal areas, ATC coordination is complicated by complex departure routes and adjacent airports. Consequently, controllers are less likely to be able to accommodate requests for weather detours. ATC also has other problems in handling the weather. Under certain conditions, echoes received from precipitation render ATC radar unusable because of clutter. To avoid disruption in radar service, modifications have been made too many radars to reduce precipitation clutter. This feature is known as circular polarization. Terminal radar systems use this feature to reduce clutter during moderate to heavy rain or snow storms in order to keep track of traffic. This necessary process, however, means the controller does not always see the weather on the radar scope. Moreover, if ATC is using a secondary radar system, the controller’s scope displays only those signals emitted by the airborne radar beacon transmitters. With this sys tem the radar scope does not display weather echoes at all. The controllers can, however, be alerted to turn on their normal radar to observe weather, provided this will not result in weather cluttering, rendering the scope unusable for air traffic control. The point to re member is that pilots should realize that the controller’s weather information is often far from complete.1.The controller primary responsibility is （ ） .
As I was about to commence the turn onto the crosswind leg, I spotted the helicopter that was supposedly joining downwind for the right hand helicopter circuit about a mile away in our 11 o’clock, at the same altitude and heading to pass just behind us, i.e., it was right in the middle of the fixed-wing circuit! If I made the turn, I estimated we would have passed within 300m of each other, so I elected to extend upwind and turn crosswind a short while later. At the time the sun was in my 5 o’clock, and I estimated that I was ‘enjoying’ the forecast visibility of 5-7 KM, however, I knew that I was cutting my own flight short. I’d estimate the visibility into sun was probably about 1-2 KM – even from only 1500’ it was barely hard to see any landmarks towards the sun. My suspicion is that the helicopter pilot never saw my aircraft despite stoves, navigation lights and landing lights, and quite possibly they never even know they had passed through an active fixed-wing circuit. The visibility reported by ATC is measured horizontally in all directions by an n observer on the ground. In conditions of low level haze, the flight visibility, measured forward of an aircraft in flight and the air-ground (slant) visibility may be significantly less than that reported by ATC. Also, the flight visibility into sun, particularly at low sun angles, will often be much reduced. The effect of haze on visibility should be covered in basic flight training.5.According to the narrator, the helicopter pilot（ ）.
As I was about to commence the turn onto the crosswind leg, I spotted the helicopter that was supposedly joining downwind for the right hand helicopter circuit about a mile away in our 11 o’clock, at the same altitude and heading to pass just behind us, i.e., it was right in the middle of the fixed-wing circuit! If I made the turn, I estimated we would have passed within 300m of each other, so I elected to extend upwind and turn crosswind a short while later. At the time the sun was in my 5 o’clock, and I estimated that I was ‘enjoying’ the forecast visibility of 5-7 KM, however, I knew that I was cutting my own flight short. I’d estimate the visibility into sun was probably about 1-2 KM – even from only 1500’ it was barely hard to see any landmarks towards the sun. My suspicion is that the helicopter pilot never saw my aircraft despite stoves, navigation lights and landing lights, and quite possibly they never even know they had passed through an active fixed-wing circuit. The visibility reported by ATC is measured horizontally in all directions by an n observer on the ground. In conditions of low level haze, the flight visibility, measured forward of an aircraft in flight and the air-ground (slant) visibility may be significantly less than that reported by ATC. Also, the flight visibility into sun, particularly at low sun angles, will often be much reduced. The effect of haze on visibility should be covered in basic flight training.4.The ATC forecast visibility may be （ ）
As I was about to commence the turn onto the crosswind leg, I spotted the helicopter that was supposedly joining downwind for the right hand helicopter circuit about a mile away in our 11 o’clock, at the same altitude and heading to pass just behind us, i.e., it was right in the middle of the fixed-wing circuit! If I made the turn, I estimated we would have passed within 300m of each other, so I elected to extend upwind and turn crosswind a short while later. At the time the sun was in my 5 o’clock, and I estimated that I was ‘enjoying’ the forecast visibility of 5-7 KM, however, I knew that I was cutting my own flight short. I’d estimate the visibility into sun was probably about 1-2 KM – even from only 1500’ it was barely hard to see any landmarks towards the sun. My suspicion is that the helicopter pilot never saw my aircraft despite stoves, navigation lights and landing lights, and quite possibly they never even know they had passed through an active fixed-wing circuit. The visibility reported by ATC is measured horizontally in all directions by an n observer on the ground. In conditions of low level haze, the flight visibility, measured forward of an aircraft in flight and the air-ground (slant) visibility may be significantly less than that reported by ATC. Also, the flight visibility into sun, particularly at low sun angles, will often be much reduced. The effect of haze on visibility should be covered in basic flight training. 3.According to the passage, the sun was （ ）to the narrator’s aircraft.
As I was about to commence the turn onto the crosswind leg, I spotted the helicopter that was supposedly joining downwind for the right hand helicopter circuit about a mile away in our 11 o’clock, at the same altitude and heading to pass just behind us, i.e., it was right in the middle of the fixed-wing circuit! If I made the turn, I estimated we would have passed within 300m of each other, so I elected to extend upwind and turn crosswind a short while later. At the time the sun was in my 5 o’clock, and I estimated that I was ‘enjoying’ the forecast visibility of 5-7 KM, however, I knew that I was cutting my own flight short. I’d estimate the visibility into sun was probably about 1-2 KM – even from only 1500’ it was barely hard to see any landmarks towards the sun. My suspicion is that the helicopter pilot never saw my aircraft despite stoves, navigation lights and landing lights, and quite possibly they never even know they had passed through an active fixed-wing circuit. The visibility reported by ATC is measured horizontally in all directions by an n observer on the ground. In conditions of low level haze, the flight visibility, measured forward of an aircraft in flight and the air-ground (slant) visibility may be significantly less than that reported by ATC. Also, the flight visibility into sun, particularly at low sun angles, will often be much reduced. The effect of haze on visibility should be covered in basic flight training. 2..Why did the narrator select to extend downwind?
As I was about to commence the turn onto the crosswind leg, I spotted the helicopter that was supposedly joining downwind for the right hand helicopter circuit about a mile away in our 11 o’clock, at the same altitude and heading to pass just behind us, i.e., it was right in the middle of the fixed-wing circuit! If I made the turn, I estimated we would have passed within 300m of each other, so I elected to extend upwind and turn crosswind a short while later. At the time the sun was in my 5 o’clock, and I estimated that I was ‘enjoying’ the forecast visibility of 5-7 KM, however, I knew that I was cutting my own flight short. I’d estimate the visibility into sun was probably about 1-2 KM – even from only 1500’ it was barely hard to see any landmarks towards the sun. My suspicion is that the helicopter pilot never saw my aircraft despite stoves, navigation lights and landing lights, and quite possibly they never even know they had passed through an active fixed-wing circuit. The visibility reported by ATC is measured horizontally in all directions by an n observer on the ground. In conditions of low level haze, the flight visibility, measured forward of an aircraft in flight and the air-ground (slant) visibility may be significantly less than that reported by ATC. Also, the flight visibility into sun, particularly at low sun angles, will often be much reduced. The effect of haze on visibility should be covered in basic flight training.1.The helicopter was（ ）
