RADIO COMMUNICATIONS

• Suitability and effectiveness of the radio equipment

  A high gain aerial was required at EPG and MES locations. We noted the radio batteries were more difficult to charge than in previous years. While all batteries were charged in the comfort of HFC before heading into the field, even unused batteries discharged within 24hours in moderate temperatures.

  Moreover, the solar panel charger for the radio batteries has two disadvantages: The batteries are cold during the charging process and in moderate winds the solar panel cannot be securely anchored to e.g. a tent. We suggest providing a black plastic box with clear lid to store the batteries and charger during charging. In sunny conditions solar heating will significantly rise battery temperature and hence charging capacity. A simple and inexpensive thermistor mechanism could be used prevent overheating through regulating air circulation within the box. A couple karabiners glued to the solar panel will assist greatly in charging batteries in windy locations.

• Reception/transmission conditions and suitability of radio schedule timing

  As last year, we noted that communications at EPG on channel 3 and 5 were poorer than the previous season at a very similar location when a hand held without high gain aerial was reliable.

• Scott Base's general efficiency during radio schedule

  Radio communication was efficient, professional, and appreciated. The timing of the radio schedule convenient.