The development of offshore wind farmsat deep and very deep waters requires a carefull and systematic evaluation of the wind energy potential. The following Technical Data Sheet describes our proposal

1. Mission
Floating platform of intense floatation with vertical moorings and excess buoyancy, self installed with
foldable mast for wind measurements, as well as measurement of sea parameters in a wide range of wa-
ter depths.
Technical Datasheet 4.6
Floating wind measurement platform
Technical characteristics
Tension leg type (TLP) self installed floating platform for measurement of wind speed and direc-
tion in a wide range of water depths, for all weather conditions, fitted with a tall tower proper for
taking measurements at the actual height, i.e. at the height where the future wind generator is in-
dented to work, either on sea bottom based foundation or on a floating «wind platform».
The platform is to operate in intense floatation, while during transportation from one place to an-
other she can float freely with safety, carrying her own anchors of big weight, capable of provid-
ing holding capacity for undertaking the excess buoyancy as well as the horizontal forces due to
wave, wind and currents.
The platform is fitted with a foldable mast which is consisting of more than one piece and which,
in free-floating condition, are folded one inside the other and all together inside the specially de-
signed central column of the platform.
The column consists a special feature of the overall design and consists of a cylindrical structure,
closed at the bottom, open at the top and fitted with concave tracks inside which the mast pieces
are sliding. This allows the parts of the mast to be folded inside the column, while at the location
of operation the parts are lifted and connected together to form the complete mast structure.
The platform is designed to be a latticed type structure with cylindrical elements, in a way that a
strong overall structure capable of undertaking the operational and weather loads is formed and
through the mooring system to transfer these loads to the gravity anchors and to the sea bottom.
She is also designed to provide large buoyancy so that, in free floating condition she can carry her
own anchors, to provide large excess buoyancy in operational conditions, while showing a small
water plane area and therefore small exerted weather forces.
Offshore Energy
Systems S.A.
48 Karaoli & Dimitriou Str
152 32 Halandri, Greece
Tel. +30 210 6775 003
fax +30 210 6812 770
www.offshoresystems.gr
tech@martech.gr

2. ΕΕ1.1150-11 (EN) | Α-00 | 17-02-2010
The platform is fitted with systems which allow her to be
characterized as self installed and more specifically with
winches for handling the mooring lines and anchors, with
pumps and piping arrangements for ballasting and
deballasting during installation, and with hydraulic system
for handling the mast parts.
The natural period of the platform can be tuned in a way
that resonance phenomena either with the incidence waves
or with the mast structure can be avoided.
The platform can be provided with additional template
shaped gravity anchors, which can be pre-installed and
which are designed so that the platform anchors are fitted
into them. In this way in extreme weather and water depth
conditions or in bad sea bottom characteristics the necessary
holding capacity is secured, which also secures the integrity
of the platform at all conditions
The gravity anchors can be designed so that shear keys of
different design suitable to different soil conditions can be
fitted on their basis in a way that the anchors are adapted to
the specific soil quality of the sea bottom.
The above-mentioned additional anchors can be designed as
simple gravity anchors or can also be fitted with different
shear keys adapted thus to the expected conditions, or even
removable piles can be fitted so that their holding capacity
is improved.
During the platform installation a method of preloading the
seabed under the anchors can be followed through an alter-
nate ballasting and de-ballasting of the platform so that the
inherence of the anchor and the seabed soil material is im-
proved, while eventual settlement of the soil is taken and the
length of the lines is corrected before the actual operation
starts.
The measurement system of the platform includes anemo-
meters installed at the highest point of the mast and which
record the
wind speed
and direc-
tion, ane-
mometers
at interme-
diate points
so that the
shear pro-
file of the
wind can
be recorded
also. It also
i n c l u d e s
sensors for
recording
the waves
and sea
currents near surface but also at the sea bottom. This information that can be used in the design of the
proper actual wind platform i.e. the platform that will carry the wind generator.
Accelerometers or other suitable sensors that can record either directly or indirectly the motions of the
platform can be included in the platform's recording system, so that the wind measurements that are
contaminated by the platform motions can be corrected.
Offshore Energy
Systems S.A.
48 Karaoli & Dimitriou Str
152 32 Halandri, Greece
Tel. +30 210 6775 003
fax +30 210 6812 770
www.offshoresystems.gr
tech@martech.gr