Fobas Calculator

With the tightening of environmental regulations under MARPOL Annex VI, ships must frequently transition between high-sulphur fuel oil (HSFO) and low-sulphur fuel oil (LSFO) or ultra-low-sulphur fuel oil (ULSFO) when entering or leaving Emission Control Areas (ECAs). A critical challenge for marine engineers is ensuring that the sulphur content at the engine inlet complies with regulatory limits ( ) before entering the ECA.

In response to increasingly stringent environmental regulations, the maritime industry has faced significant operational challenges, primarily regarding sulphur oxide (SOx) emissions. To comply with MARPOL Annex VI and specifically the rules governing Sulphur Emission Control Areas (SECAs) , vessels must switch from standard heavy fuel oil to low-sulphur alternatives before entering restricted waters. The FOBAS Fuel Changeover Calculator , developed by Lloyd’s Register , has emerged as a critical tool for ensuring this transition is both compliant and safe. fobas calculator

Total volume (in liters or tonnes) of all in-line components, including filters, booster pumps, heaters, and pipes between the settling/service tanks and the engine. To comply with MARPOL Annex VI and specifically