Hitung drink water & Final draft

 Sebuah kpl = 150 m, tiba dimuara sungai dgn sarat depan = 5.5 m & sarat belakang 6.3. MTC = 200 ton/m TPC=15, COF berada 1,5m dibelakang center line. Kpl baru boleh masuk sungai jika Draft belakang=6.2 m shg perlu mengisi Ballast pd Fore peak Tank (FPT)

Hitunglah : drink water yg hrs diisi & Final draft

Draft Lama  = 6.3 m

Draft yg diinginkan         = 6.2 m

Penguranan Draft           = 0.1 m

Boclily Sinkage                 = w/TPC= W/15

COD yg diinginkan            = 10 + W/15

COD Aft     = l/L x COT

                  = 73.5 x w x 61.5

                             150        200

                  = 0.49 x 0.3075 w

                  = 0.1507 w

Draft belakang yg diinginkan = 10 + w/15

0.1507 w     = 10 + w/15

2.2605 w     = 150 + w

1.2605 w     = 150

w                = 119.0 Ton

Bodily Sinkage = W/TPC = 119/15 = 7.93 cm

COT   = Wx d = 119 x 61,5 = 36.59 cm

              MCTC       200

COD Aft  = l/L x COT = 73.5 /150 x 36,59 cm

= 17.93 cm

COD fwd = COT – COD

Aft = 36.59 – 17.93 = 18.66 cm

 Fwt            Aft

Initial Draft          =  5.5000 m     6.3000 m

Bodily Sinkage    =  0.0793 m +  0.0793 m +

Present Draft      =  5.5793 m     6.3793 m

COD      =  0.1866 m +   0.1793 m -

Final Draft   =  5.7659 m    6.2000 m