OCIMF_Mooring_Equipment_Guidelines_(Second_Edition)

(Barry) #1

As can be seen the maximum longitudinal force and maximum transverse force at the forward
perpendicular are developed in the ballast coodition. Tbe maximum transverse force at tbe aft
perpendicular is practically equal in ballast and full load condition. These values compare with those
of formulae (10). (9) and (11) in Section 2.4.1 as follows:


Formula (10) Fx max = 0.498 x 1380 + 0.046t3 x 6.1 )( 329.3 = 780 kN


Formlilil ( 9) FVA max = 0.2839 x 3225 + 0.2482)( 19.2 x 329.3 = 2485 kN


Formula (11) F YF max = 0.284 x 7622 + 0.02595 x 6.t x 329.3 = 2217 kN


As can be seen, the values derived by fonnulae (10), (9) and (ll) are in good agreement with the
maximum forces obtained in (his example.

The maximum forces can be compared with the restraint capacities developed for a 250 kdwt tanker
in Append,ix E. This comparison wiJl provide a rough check as to wbether the ship, when moored
at ao idealized mooring arrangement, can stay moored under the recommended design mooring
conditions.

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