On the Preliminary Determination of Ship's Principal Dimensions by Using f/d and GM/B

Abstract

In case of preliminary determination of ship's principal dimensions, a frequently used method is the trial and error method in which the dimensions and hull coefficients of ships are adjusted to obtain required freeboard (f) and metacentric height (GM). The author derived a new, reasonable and simple method to determine the principal dimensions dy the use of dimensionless f/d and GM/B instead of f and GM. Basic formula is GM=KB+BM-KG. From this formula, it is possible to determine Eq. (1), and then to determine principal dimensions from Eqs. (1) and (2). This process is summarized in Table 3.