BioMarine UNDERWATER ECOTECHNOLOGY 
Boat Anchorage System Boat Anchorage System that has a strong positive impact on the environment favouring the Proliferation of the Marine, Flora and Fauna.
MATHEMATICAL REPORT FOR THE USE OF A TECNOREEF STRUCTURE FOR:
BOAT ANCHORAGE
TECNOREEF MATHEMATICAL RELATION
SHORT DESCRIPTION OF THE ANALYSIS
The analysis aims at underlining the calculation processes which determine the planning of the Tecnoreef structures.
Our calculation proves that the structures do hold the weight of anchorage.
Estimate on the force acting on an anchored boat (horizontal force which has to be counterbalanced by the anchorage system).
Estimate for boats of 15 ml
Assumption:
Heighth of the waves : 5 ml
Anchorage depth : 12 – 15 – 20 ml
Av= exposed surface
V= wind speed ( estimate 154 N = 7,7 m/s)
Ftot.=F wind + F waves
Fwind = 0,72 x A x V x V = 0,72 x 3 x 18 x 18 = 700 N
Fwave = 1000 x 1 x A x V x V = 1000 x 2 x 0,63 x 0,63 = 800 N
F total = 1.500 N
•Leisure boat of 15 ml of length
Sail: AV=15x2=30 AO=15x1=15
Engine: Av=15x3=45 Ao=15x0,75=11,25
Assumption:
H=1m;T=7s;H=10m; V=70/120=0,6 m/s
F.tot. sail=1.300 N+5.400 N=6.700 N
Ftot. engine=1.900 N+4.000 N= 5.400N 7.000 N considered out of prevention
Assumption: L = 3h à =19°
Traction of 19° on an immersed object
Eq.vertical P – R – t sen à =0
Eq.horizontal T=cos à – N = 0 N = m R
Substituting
P= T cos à/ m + T sen à
Assumption m = a 0,60
The weight of the necessary TecnoreefÒ structure is of: (security coefficient of 2 already included)
Boat of 15 ml in 15 m of depth = 13.300 N corresponds to 1.300 kg
Referring to a TecnoreefÒ structure chosen for anchorage this means:
Total weight = Weight of the structure + anchorage force to the seabed + sanding
Total weight = Weight of the structure + ( +100% of the same weight) +
(100 kg per TecnoreefÒ element inserted into the seabead)
Total weight = 1.800 kg + 1.800 kg + ( 6 x 100) = 4.200 kg
The calculation parameters chosen:
1.Coefficient
2.Nevertheless the TecnoreefÒ structures work at coefficients of above
3.All data and all calculation methods have been verified through the planning.
At present the data provided for the assumptions  not necessarily corresponding to the usual
professional instructions  are the result of hydrodynamic studies made in the basin of the
Department for Water and Land Structures Engineering of l’Aquila
The wave action conditions for the analyses in the basin are listed below in order to allow a better comprehension of the project’s data.
Wave action conditions
