Cargo stripping features for dual-purpose cryogenic tanks on ships or floating storage units for LNG and liquid nitrogen

A carrier for storing and transporting cryogenic liquids, comprising:

• a tank configured to store and transport a cryogenic liquid having a liquefaction temperature;
• a first pump configured to fill the tank with the cryogenic liquid and empty the tank of a first portion of the cryogenic liquid, thereby leaving a second portion of the cryogenic liquid in the tank;
• a tank structure that focuses the second portion of the cryogenic liquid at a location on a bottom of the tank;
• a second pump located at the location and configured to empty the tank of the second portion of the cryogenic liquid except for a residual portion of the cryogenic liquid that is left therein;
• and
• a focused heating structure configured to deliver heat to the location on the bottom of the tank;
• wherein the heat is configured to raise a temperature of the residual portion above the liquefaction temperature, thereby vaporizing all of the residual portion.