Radiocommunications (Aircraft and Aeronautical Mobile Stations) Class Licence 2006
Eljay is on the money, you really don't know what you are missing until you have the second frequency (or radio). They are great when you are flying away as a group, you can chat all day on chat whilst listening to centre at the same time. My XCOM had a push button on the yoke where I could switch from the primary to the secondary which was really handy.
I'm tipping that you'll end up with an IcomA210 or an XCOM760. They do a similar job, although the XCOM is smaller, uses less power and the intercom is better based on my experience (I'm not taking price into consideration). The A210's had a lot of issues when they came out but they are fairly sorted now.
1
(a) aero club operations
(b) flying school operations
(c) firespotting
119.1
2
Parachute club operations
119.2
3
Helicopter operations:
(a) air to air communications only
(b) ground to air and air to ground communications only
120.4
120.8
4
Aviation sport
120.85
5
Emergency operation:
(a) Satellite location:
(i) until 31 January 2009 — for aircraft stations and aeronautical mobile stations only
(ii) for aircraft stations only
(b) Homing:
(i) for aircraft stations only
121.51
243.01
406–406.1
121.51
Note
1 By international agreement, from 1 February 2009 the COSPAS‑SARSAT System will receive transmissions only in the frequency range 406‑406.1 MHz.
6
Glider or sailplane operations
122.5
122.7
122.9
7
Fishing operations or agricultural operations including stock mustering
122.8
8
Pilot to pilot communications
123.45
9
Air show
127.9
10
Traffic information broadcasts by aircraft (TIBA):
(a) at or above FL200
(b) below FL200
128.95
126.35
11
Aircraft industry testing
129.1
12
Crop dusting
129.6
13
Aerodrome operations
129.9
14
Charter purposes (above 20 000 feet)
135.95
15
Charter purposes and other purposes not listed in another item
126.4
128.9
135.55