What would you consider the best frequency for dynamic environments? If there was one theoretical "King of the Hill" frequency you had to pick, what would it be? The range is relatively close, ranging from metropolitan to rural 15 mi max (details below). The range is close enough that there should be an appropriate "bracket" of distance where one frequency can be applicable. This is without the use of repeaters, and for voice simplex use, and it doesn't have to be your typical ham modulation. (Let's assume the appropriate wattage according to distance and other variables such as the proper equipment and antennas are automatically employed so we don't have the need to discuss that.) If you'd like to pitch in what RF modulation you would suggest, that's fine, but I'm not looking nor asking for such in this post. I will be posing that question in a separate post here: https://forums.qrz.com/index.php?threads/best-rf-modulation-for-dynamic-environments.698188/ I live in a peculiar environment, where the city center (where I currently work and reside) has buildings about a 1^2mi on a hill, then just outside of the city center it transitions small buildings for 1-3^2 mi on a flatter terrain, followed by endless miles of farmland. I have tree points of contact: 1. Inside the heart of the city center through endless floors and buildings, usually no more than 2. City center to city limits approx. 3 mi out 3. City center to 15 mi out Concerns: 440MHz simplex is great for the buildings...but not much else here. 70cm tends to get "eaten" by the farmland, and for mid distance (1-2mi out), sometimes 2M shoots right over my head, and I can receive 220MHz great and 440MHz with some haze.