or by the shape of the hull form, internal mass balance ....etc - at least, ship does not have a sonar dome to act as a buoyancy/anti-buoyancy in 19 century....
小貓不會作模型,小貓只愛玩模型;看似小貓玩模型,其實模型玩小貓: A B 補土白膠條,樹脂改套蝕刻片;凹線凸線凹凸線,乾磨水磨銼刀磨; 水性油性消光漆,乾掃手掃噴槍掃;模型一盒三百幾,零件一堆三千幾; 多買多作進步多,買了不作口水多;花錢耗時傷精神,小貓是隻敗家喵。