CS_MASI

Select from the following set of sentences concerning the auxiliary systems, the sentence(s) you believe are true: The ELT message includes always the aircraft’s gps position. The COOSAS-SARSAT low earth orbiting satellites provide immediate transmission detection. The CVR records the crew's microphone audio signals even if the corresponding PTT switches are not activated. The passenger address system power is immediately disconnected after the shutdown or failure of all engines and auxiliary power units. The ELT cannot be manually activated by the pilots. The CVR records a time reference for synchronization with FDR Data. The unique identification of each ELT is represented as a string of 15 hex characters. The CVR installation includes automatic means to stop the recorder and prevent the erasure feature from functioning within 10 minutes after crash impact. The second-generation ELT beacons will be capable of transmitting a message indicating that previous transmission was a false alert in case of inadvertent activation.

Select from the following set of sentences concerning the Audio Management System, the sentence(s) you believe are true: The AMS audio bandwidth must be maintained between 300 and 3000Hz. Th interphone transmission can be activated using only the PTT switch. The VOX function can be used for radio transmissions. The switches for loudspeaker and mask microphone connection are located outside the Audio Control Panels in some implementations. The binaural capability is available for the pilots in many aircrafts. The Passenger Address transmission is activated with the radio PTT switch.

Select from the following set of sentences concerning the Audio Management System, the sentence(s) you believe are true: The VOX function can be used for radio transmissions. The switches for loudspeaker and mask microphone connection are located outside the Audio Control Panels in some implementations and the AMS may provide loudspeaker attenuation or muting for the operator who is transmitting to avoid audio coupling. Functions: 1. Transmission and reception through aircraft communication systems 2. Transmission through the Passenger Address system 3. Reception from aircraft audio receivers 4. Reception of aural alerts from aircraft systems 5. Interphone function: Communication between aircraft operators 6. Transmission to audio recorders 7. Selective Calling (SELCAL) depending on aircraft configuration. Components: Audio Management Unit (AMU) / Audio Control Panel (ACP) / Jack Panel (JP) / Loudspeaker / Switches / SELCAL Code Panel (if implemented). Each ACP is an independent system. Regulation: ETSO/TSO-C139a: DO-214A. The AMS audio bandwidth must be maintained between 300 and 3000 Hz. The mask microphone can be used for one operator at the same time as the integral headset microphone.

Select from the following set of sentences concerning the Auxiliary Systems, the sentence(s) you believe are true: The Passenger Address system power is immediately disconnected after the shutdown or failure of all engines and auxiliary power units. The ELT Message includes always the aircraft GPS position. The RIPS can provide electrical power to the CVR during all flight duration in case od power loss from aircraft electrical system. CVR records crew's microphone audio even if the corresponding PTT switches are not activated. ELT can be manually activated by pilots. The second-generation ELT beacons will be capable of transmitting a message indicating that previous transmission was a falsetion with FDR. alert in case of and inadvertent activation. CVR records time reference for synchorinzation with FDR. CVR is not mandatory for all aircraft. CVR includes automatic means of stop the recorder to prevent erasure within 10 min after crash. Identification of each ELT is represented as a string of 15 hex characters.

Select, from the following set of sentences concerning the High Frequency (HF) communication system, the sentence(s) you believe are true: HF communication system provides short-distance (up to the line of sight) communications, complementary to satellite communications providing long-distance (over the horizon) communications. Considering spectral efficiency and energy efficiency, the modulation used for the HF system is a double sideband (DSB) full carrier amplitude modulation. K index, solar flux F10.7 index and ionospheric maps allow to know the state of ionosphere and are useful for link performance prediction (by means of different prediction models). Availability of radio channels is semi-random, which makes the use of automated HG systems (ACS,ALE, ALM...) highly recommended to reduce pilot/user interface requirements.

Select, from the following set of sentences concerning the Satellite Communications (SATCOM) system, the sentence(s) you believe are true: Iridium coverage does not include the polar regions. The antenna of the SATCOM system is omni directional, because this kind of antennas increases the coverage. The antenna system has to provide for any aircraft a minimum value for the G/T figure of merit, being this minimum value -19 dB/K over the 85% of coverage. Doppler effect is more important in geostationary satellite systems than in Low Earth Orbit (LEO) satellite systems. The AMMS service in the L band has priority over non AMMS services and the capability of pre-emption in this band. ICAO approved safety services, are currently supported worldwide by Inmarsart and Iridium, and in North Africa by the american mobile satellite consortium and.