What frequency should be used to contact the FSS to activate a flight plan when departing from Harvey Field?

Harvey Field utilizes a frequency of 122.55 MHz for activating flight plans via the Flight Service Station (FSS). This frequency is specifically designated for general aviation communications, including pilot-initiated flight plan services. It is important to use the correct frequency to ensure clear communication and efficient activation of the flight plan.

The other frequencies listed—123.45, 122.75, and 122.95—are typically used for other purposes, such as air-to-air communications or different types of traffic advisory services, making them unsuitable for the specific task of activating a flight plan at Harvey Field. Therefore, 122.55 MHz is the appropriate choice for pilots to effectively communicate with the FSS when departing from that location.