Choosing the right walkie-talkies for a cruise ship can be a bit confusing, but let's break it down. There are two types of walkie-talkies to consider: FRS and GMRS.
FRS (Family Radio Service) walkie-talkies operate on a lower frequency and were originally designed for low-power communication. You can find cheap options for kids' entertainment or higher quality ones with a range of a couple of miles. However, FRS walkie-talkies may struggle to work well inside the cabin, as they are more effective in open areas like the ship's deck or public spaces.
On the other hand, GMRS (General Mobile Radio Service) walkie-talkies are more powerful and operate on a higher frequency range. They can provide better reliability, but it's important to note that you need a license to use them in the US, which costs around $80. Additionally, their use is restricted in some parts of the world due to interference with emergency services frequencies.
GMRS radios give you access to all FRS channels, as well as exclusive channels. However, these exclusive channels are often used for emergency distress discussions by various countries, so civilian use can lead to serious consequences.
It's also worth mentioning that FRS radios come in different frequency bands: VHF (Very High Frequency) and UHF (Ultra High Frequency). VHF walkie-talkies are better for longer ranges and open spaces, making them suitable for use between ships or at festivals. UHF walkie-talkies have a lower range but can penetrate solid surfaces better, making them more suitable for indoor use.
Considering all these factors, GMRS walkie-talkies are the best option for a cruise ship, but they require a license. If you don't want the hassle of getting a license, a UHF FRS walkie-talkie is a more common choice. Keep in mind that their effectiveness may be limited inside the cabin due to metal structures. However, stepping into corridors or public areas with more open spaces can improve their range and effectiveness. These walkie-talkies don't require a license and won't cause any trouble with port authorities.