international air navigation and to foster planning and

development of international civil air transport.

INTERROGATOR, The ground-based surveillance              詢問器，

radar beacon transmitter-receiver, which normally scans    一種地面監視雷達信標收發機。通常在工作時與主雷達

in synchronism with a primary radar, transmitting        同步掃描，發射不連續的無線電信號，不斷地重復要求與

discrete radio signals which repetitiously request all   其工作方式一致的應答機進行回答。所接收到的回答信號

transponders on the mode being used to reply. The        與主雷達接收到的信號相混合，顯示在同一平面位置的雷

replies received are mixed with the primary radar        達屏幕上。

returns and displayed on the same plan position radar

scope.

INTERSECTION,                                            交叉點，

    1. A point defined by any combination of courses,          1.  由航線，徑向方位線，或兩個以上的助航設備

      radials or bearings of two or more navigational              的方位交會而確定的一點。

      aids.

    2. Used to describe the point where two runways             2.  指兩條跑道的，滑行道與跑道，或兩條滑行道

      cross, a taxiway and a runway cross, or two                  的交叉點。

      taxiways cross.

INVERTER, An electrical device for changing direct       變流器，

current to alternating current for standby (emergency)       用來將直流電變成交流電；以供電氣系統備用（緊急）

power supply to electrical system.                       電源的電氣裝置。

                                        TECHNICAL DICTIONARY                                      83

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英漢對照民用航空詞典                                  BOEING

IRS, SEE - INERTIAL REFERENCE SYSTEM              慣性基準系統，

                                                    見Inertial Reference System．