Nortek Dopler Velocity Log Aids Volvo Ocean Race Entrant

Press Release
Thursday, May 24, 2012

Nortek collaborated with Puma Ocean Racing to fit a modified compact Doppler Velocity Log to PUMA’s 'Mar Mostro' Volvo Ocean Race competitor

“The collaboration between Nortek and the entire PUMA team has resulted in an tool that provides unique information to the sailing crew.  They can now measure leeway, a first in sailing, and use it to measure ocean currents much more precisely than ever before,” said Atle Lohrmann, CTO of Nortek.

“This is the biggest advancement in sailing instrumentation since the invention of the GPS,” said Hopkins, who runs performance testing for PUMA and worked with Nortek on the project. “Nortek adapted their new DVL technology to our sailing performance needs, to measure very high speeds along the boat's track and very low speeds across it. With Nortek's history of deploying instruments on buoys in hostile Arctic conditions, we knew that we could trust the Nortek DVL in a race around the world.”

Leeway is the sideways skidding angle a boat makes as it sails forward. Leeway can be changed on a Volvo Open 70 yacht by adjusting the daggerboard immersion and canting the keel. The adjustable daggeboards and keel act like wings underwater to counteract the force of the sails. The crew relies on Nortek DVL leeway measurements to optimize PUMA's Mar Mostro performance at all times, providing the core data upon which every other performance measurement is based.

The Nortek DVL uses acoustic techniques to measure water velocity along each of the four beams.  The sensor is mounted in the bottom of the lead bulb of the keel. The acoustic beams are oriented forward, aft and abeam.  Data from each beam is streamed to the on board computer which also receives data from the inertial motion sensor and the keel cant angle sensor. Velocity and orientation measurements are then used to output true forward boat speed and leeway. Real time currents can be directly estimated by differencing the GPS boat speed over ground and the boat speed through the water.


Maritime Reporter September 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds


ADF’s New Amphibious Capability Demonstrated

Australia’s newest military capability, the Amphibious Ready Element, has demonstrated its capacity in waters off the North Queensland coast during the Sea Series of exercises.

Rieber Amends Dolphin Deal

Norwegian shipping company GC Rieber Shipping ASA has entered into an agreement with Dolphin Geophysical to increase Dolphins competitiveness in a challenging market.

Volvo Ocean Race Partners with Yacht Racing Forum

The Volvo Ocean Race has agreed a three-year partnership with the Yacht Racing Forum.   "We are delighted to welcome the Volvo Ocean Race as a long-term partner,

Marine Materials

Kalmar to Upgrade MSC Terminal VLC (Valencia) Cranes

Kalmar, part of Cargotec, has announced a large contract to heighten and extend the handling capabilities of eight ship-to-shore (STS) cranes at MSC Terminal VLC in Valencia, Spain.

Wärtsilä Debuts Package for hydropower & industrial plant

Wärtsilä Corporation, a global leader in complete lifecycle power solutions for the marine and energy markets, expands into a new market segment, offering a comprehensive package of seals,

Demands for Icebreaker Tours Spiral

Plans to terminate commercial tours to the North Pole on the nuclear-powered icebreakers of the Atomflot company in 2016 have surged the demand for these tours.


Volvo Ocean Race Partners with Yacht Racing Forum

The Volvo Ocean Race has agreed a three-year partnership with the Yacht Racing Forum.   "We are delighted to welcome the Volvo Ocean Race as a long-term partner,

Regulations for Singapore's Kusu Pilgrimage Season

The 2015 Kusu Pilgrimage season will commence on 13 October 2015 and end on 11 November 2015. During this period, many ferries and harbour craft carrying

Steel Processing for largest Sail Boat Begins

Processing of steel for Hull 483 started on sheet-cutting machine in Shipbuilding Industry Split on 22 September 2015. It is the largest square-rigged ship contracted for a Monaco buyer,

Maritime Contracts Navigation Offshore Oil Pipelines Port Authority Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0755 sec (13 req/sec)