SonarPhone SP-300 T-Box

For those with small yachts or who would like to fit sonar to a tender for checking out anchorages, this portable, battery-powered transducer and Wi-Fi sender is ideal.

The suction cup-mounted SP-300 T-Box comes with a carrying case for the 12V, 4Ah rechargeable battery, charger, transducer and cable. It boasts a powerful, dual-beam 20°-40°, 200kHz transducer with a range of 70m that will run for 20 hours from a full charge. Compatible with Navionics’ SonarChart Live, you could also send your soundings off to the UG database for all to share.

Price about £175 online Contact Vexilar www.sonarphone.mobi

The SonarPhone SP-300 T-Box is a self-contained transducer system for those who want to make their own charts