They offer portability in the same way a cordless phone allows more mobility at home. A handheld radio may be just what you need for use in a dinghy, small boat without electrical systems, or as an emergency backup for your boat's radio. Handhelds have a maximum output of six watts. Due to their short antennas, they have a limited range of five miles. A significant increase in range can be achieved by connecting an external antenna or using a telescoping antenna mounted to the hand-held radio.
Battery life varies with the size of the battery pack.
Many models have optional battery packs with longer operating times, or greater transmitting power, or both. Some have battery saver circuits that turn off the receiver to save power. The battery life of a handheld can be increased by switching from full transmit power to one watt of transmit power. Handhelds are not DSC capable. The most important channel on a VHF radio is Channel 16, the international distress and calling frequency.