by detailed mass and moment calculation, in which case the lightweight of the vessel shall be verified by checking the draught, with a tolerance limit of +/- 5 % between the mass determined by calculation and the displacement determined by the draught readings.
z natančnim izračunom mase in momenta, pri čemer se lahkost plovila potrdi s preverjanjem ugreza z dovoljenim odstopanjem +/-5 % med maso, določeno z izračunom, in izpodrivom, določenim z odčitavanjem ugreza.