**5. CTV against 41 m diameter cylindrical floater**

The third calculation models the "bump and jump" against a cylindrical wind turbine floater (**Figures 9** and **10**). The water depth is 23 m.

The studied cylinder has: a 41 m diameter, 7 m draft, 9300 T displacement.

*Optimizing Berthing of Crew Transfer Vessels against Floating Wind Turbines… DOI: http://dx.doi.org/10.5772/intechopen.102012*

#### **Figure 6.**

*CTV berthing against 13 m diameter cylindrical floater (3D view).*

**Figure 7.** *CTV berthing against 13 m diameter cylindrical floater (plane view).*

**Figure 8.** *Curves T/N and fgrip versus λ/B for 2 m Hs.*

#### *Wind Turbines - Advances and Challenges in Design, Manufacture and Operation*

#### **Figure 9.**

*CTV berthing against 41 m diameter cylindrical floater (3D view).*

**Figure 10.** *CTV berthing against 13 m diameter cylindrical floater (plane view).*

One more time, the floater masks the CAT CTV from the incidental waves, therefore the horizontal incident wave loads are masked, while the vertical incident wave loads are only the ones passing below the floater keel.

**Figure 11** compares for 2 m Hs the calculated ratio T/N with fgrip versus λ/B. This time berthing may take place for 2 m Hs whatever the wavelength.

### **6. CTV against 36 m side parallelepipedal floater**

The fourth calculation models the "bump and jump" against a parallelepipedal wind turbine floater (**Figures 12** and **13**). The water depth is 23 m.

The studied cylinder has: a 36 m sides, 7 m draft, 9300 T displacement (same draft and displacement as in Section 5).

*Optimizing Berthing of Crew Transfer Vessels against Floating Wind Turbines… DOI: http://dx.doi.org/10.5772/intechopen.102012*

**Figure 11.** *Curves T/N and fgrip versus λ/B for 2 m Hs.*

#### **Figure 12.**

*CTV berthing against 36 m side parallelepipedal floater (3D view).*

One more time, the floater masks the CAT CTV from the incidental waves, therefore the horizontal incident wave loads are masked, while the vertical incident wave loads are only the ones passing below the floater keel.

**Figure 14** compares for 2 m Hs the calculated ratio T/N with fgrip versus λ/B. This time berthing may take place for 2 m Hs whatever the wavelength.

### **7. CTV against FLOATGEN floater**

The fifth calculation models the "bump and jump" against an existing [9] square hollow floater (**Figures 15** and **16**). The water depth is 23 m [10].

The studied square has [9, 10]: 36 m side, 7 m draft, 6000 T displacement (same draft as in Sections 5 and 6).

Once again, the floater masks the CAT CTV from the incidental waves, therefore the horizontal incident wave loads are masked, while the vertical incident wave loads are only the ones passing below the floater keel.

**Figure 13.** *CTV berthing against 36 m side parallelepipedal floater (plane view).*

**Figure 14.** *Curves T/N and fgrip versus λ/B for 2 m Hs.*

**Figure 17** compares for 2 m Hs the calculated ratio T/N with fgrip versus λ/B. One more time berthing may take place for 2 m Hs whatever the wavelength.
