Vessel Volume & Level Calculation - Estimates Volume filled in a Horizontal/ Vertical Vessel with 2:1 Ellipsoidal, Hemispherical, Torispherical and Flat heads. It also calculates volume for different level alarm settings eg High High Liquid Level (HHLL), High Liquid Level (HLL), Normal Liquid Level (NLL), Low Liquid Level (LLL), Low Low Liquid Level (LLLL).