In a handheld you're going to use routinely for communication, you should be looking for:
- A volume knob.
- A squelch knob.
- Loud, clear audio that can be heard over
weather and engines.
That actually rules out quite a few.
Decide if you need DSC and a
GPS for anything. I don't. My handheld VHF is not part of my plan for initial contact to summon
rescue assistance. I do not use my handheld VHF for
navigation because in nearly all cases I'd rather use my
phone, or the
chartplotter, or a dedicated portable GPS. Your use case may be different.
Decide if you need a
battery tray. They are perhaps useful for standby uses. Some handhelds have larger
battery trays that can provide enough
power to support transmit at 5 watts, most don't.
Decide if you need to be able to swap
batteries in a wet
environment. Some radios are sealed even when the battery is being replaced, others are not.
Decide what kinds of
charging connections you can live with. Some are set up for USB
charging, which has to be done in a dry location but uses
cables and a brick you already have. Others have drop in chargers which are bulky but more convenient for regular use.
Decide whether you want the
radio to float. Usually floating radios are bulky or have smaller
batteries and therefore shorter battery life.
I like the Standard Horizon HX380, which doesn't have a GPS or DSC or AIS but is particularly well designed otherwise. There are other good radios out there.