What communication devices are preferred in emergencies?

Portable two-way radios are preferred in emergencies due to their ability to provide reliable communication over varying distances and terrains. These devices allow for immediate voice communication, which is critical in emergency situations where swift action and coordination are necessary. They operate on radio frequencies and do not rely on external infrastructure, making them particularly useful in environments where traditional communication lines may be compromised or non-existent, such as underground mines.

Walkie-talkies are similar to portable two-way radios in functionality but typically have a limited range and battery life, which can hinder their effectiveness during critical situations. Landline telephones depend on existing physical connections, which may not be available during emergencies, and signal flares are not a means of direct communication but rather a distress signal that does not provide the back-and-forth dialogue needed to effectively manage an emergency response. Thus, the advantages of portable two-way radios make them the most suitable choice for effective communication in emergencies.