The Magazine for Underwater Professionals
22nd January 2018
Deep BV, a Dutch survey company specialising in hydrography, marine geophysics and oceanography, has purchased underwater acoustic technology supplied by Sonardyne International, UK, to support its inshore, harbour, coastal and offshore activities.
“The two Mini-Ranger 2 ultra-short baseline tracking systems and WSM 6+ mini transponders were delivered to Deep BV’s headquarters in Amsterdam within days of the order being placed and put straight to work during an operation to search for unexploded ordnance (UXO),” said Sonardyne.
The company added: “Mini-Ranger 2 boasts a number of features that makes it ideal for underwater operations such as UXO surveys which require high-accuracy positioning but without the cost and complexity associated with a deepwater USBL solution. It can simultaneously track 10 targets at very fast update rates, it is quick to install on small vessels and has a tracking range of 995 metres, extendable to 4000 metres.”
For its first project with Mini-Ranger 2, Deep BV installed one of the systems on board its 15-metre, twin hull research vessel Deep Volans, and configured it to track a WSM 6+ transponder mounted on a remotely operated towed vehicle named Iron Lady. Accurate positioning is paramount for the Iron Lady’s control software in order to ‘fly’ the six-metre wide gradiometer UXO set-up just two metres above the seabed.
Klaas Visser, chief technology expert at Deep BV, said: “We’ve been a user of Sonardyne’s pre-generation Scout USBL system for several years and have been pleased with the results it’s delivered. However, now was the right time to replace these systems and upgrade to Sonardyne’s 6G product family with all of its attractive features and performance gains.”