| abstract |
A combination of a ship having a hold with a bottom and walls, and a tank, which is circular in horizontal section, for transporting a liquefied gas; said tank having a metal shell having (1) a substantially flat metal bottom (2) a spheroidal section constituting most of the upper part of the tank and (3) a toroidal knuckle portion tangentially joined to the periphery of the metal bottom and tangentially joined to the spheroidal section; load bearing insulation between the ship hold bottom and the tank metal bottom; and a skirt, circular in horizontal section, extending from the tank above the toroidal knuckle portion downwardly to a supporting base in the ship hold. |