Steamly S2-S/Avionics

SECTION 3. AVIONICS

1 Radios

Figure 1: VHF Radio

A 760 channel COM radio (Figure 1) is mounted near the bottom of the middle panel. The COM radio operates in the VHF band between 118.000 Mhz and 136.975 Mhz and has a maximum range of about 15 regions (3.75 km). As a station approaches the maximum range, reception quality will begin to degrade.

The selected frequency is shown in the middle of the radio.

The knob on the left controls the whole MHz value, and the knob on the right controls the fractions of a MHz in 0.05 Mhz increments. A button labeled "+0.025" on the right hand side toggles an addition of 0.025 Mhz on the displayed frequency. In addition the chat commands "com1" and "com2" can be used to select a frequency. For example:

com1 128.125 would set the COM1 frequency to 128.125 MHz.

Each airport in SL, has a specific set of frequencies associated with it that may be viewed by clicking on an airport icon on the Shergood Aviation Map. These frequencies are:

CTAF/TWR - When an airport has an operating control tower, this frequency is used for communication with the control tower. When no control tower is in service, this frequency is the CTAF (Common Traffic Advisory Frequency). The CTAF is used to self-announce position relative to the airport ATIS - Automatic Terminal Information Service - This frequency broadcasts weather and notam information about an airport. Ground - This frequency is used for ground communication at an airport. Normally this frequency is used only when a control tower is in service. In other cases, the CTAF is used. VOR - Frequency of the VOR navigation beacon at an airport. This frequency is used by the NAV radios.

Figure 2: Transponder

Figure 3: GPS