44 st / February 2014 www.sea-technology.com
WindSentinel Trial Deployment
In 2009, AXYS ran a proof-of-concept trial at Race Rocks
on the coast of British Columbia. One Vindicator was posi-
tioned on an island, the other mounted on the NOMAD hull
offshore. The sensors were 700 meters apart. In reviewing
the results, GL Garrad Hassan stated in a 2011 paper for
the European Wind Energy Association that the buoy mean
wind speed agreed within 2 percent of the reference lidar
This deployment was the world's frst validation of a
foating lidar system, and it confrmed the effectiveness of
the motion compensation feature. Based on the results of
Lidar requires a signifcant power
supply, typically around 100 to 120
watts in standard operation and up to
400 watts in extreme cold. The Wind-
Sentinel power supply has been specif-
cally engineered to support long-term
remote deployments of up to a year at
this level, with minimal service trips.
Sealed lead acid rechargeable batter-
ies power the WindSentinel. These bat-
teries are charged by a wind generator
and two 210-watt solar panels backed
up by a high-effciency diesel generator
for times of extended lulls in the wind.
In this confguration, the WindSentinel
can support the typical system power
draw of 135 watts and, in extremes, can
support up to 500 watts. With this ca-
pacity, the WindSentinel is capable of
meeting its goal of long-term remote deployments.
The third component is the WatchMan500. With this in-
novative technology aboard, each system has an intelligent,
confgurable sensor I/O platform with two-way communica-
tion and diagnostics and an intuitive menu-driven program.
The ultralow-power modular design allows for future system
expansion, and the support for all major telemetries means
that the system can be managed remotely from anywhere.
Onboard data logging and storage of 8 gigabytes can be ex-
tended up to 16 gigabytes. The WatchMan500 allows clients
to manage the system remotely and retrieve data in near real
time, supporting extended remote deployments.
The WindSentinel buoy deployed
off Atlantic City by Fishermen's
Scientifc Data Buoy
Plymouth Marine Laboratory (PML) invites interested parties to
tender for the provision of a scientifc data buoy. The platform,
which will be permanently moored at a long-term monitoring
and marine biodiversity reference site, must include the:
• Ability to raise and lower oceanographic sensors
intelligently through the water column;
• Infrastructure expansion for additional technological
• Ability to withstand the often hostile environment of
the western English Channel.
Invitation to tender
www.westernchannelobservatory.org.uk firstname.lastname@example.org @PlymouthMarine
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