A box-shaped vessel 120m long and 15m wide is floating in DW of RD 1.005 at a draft of 5m. if her maximum permissible draft in SW in 6m, find how much cargo she can now load.

Area of box shape vessel = (Lx b)
= 120 x 15m,
RD = 1.005, Draft =5m
Mass     = (u/w volume ) x (density)
= (120 x 15 x 5) x (1.005)
= 9045t .

Maximum cargo she can load = (120 x 15 x 6) x (1.025)= 11070 t

Cargo can be load = (11070 – 9045)
= 2025t.