Up to 20 miles offshore; $44 to $860
Cellular coverage can be marginal to nonexistent offshore, but these devices can increase range.
The DM547 ($44, digitalantenna.com) universal cell phone cradle from Digital Antenna boosts your signal up to 10 times. The adjustable holder fits most any size mobile phone and has a built-in amplified antenna.
Digital Antenna’s DA4500 ($240) pocketbook-size cellular amplifier and an externally mounted marine fiberglass antenna (18 inches to 8 feet, $160 to $290) boosts signal gain by up to 100 times.
Digital’s PowerMax Wireless Cellular Amplifier/Repeater Systems ($650 to $860) can be connected wirelessly to mobile phones, computers or tablets for ranges of up to 20 miles offshore, depending on cell site location and blockage by structures or hills. Installation requirements reserve these systems for 45-plus-foot boats.