Navigator Global Investments Limited announced that in determining the Navigator Group's interim financial result for the six months to 31 December 2017, there has been a $3.0 million increase in operating expenses for first half 2018 as compared to operating expenses incurred for the six months to 30 June 2017. Despite the higher level of operating expenses incurred in first half 2018 compared to historical periods, the Group expects to report an increase in EBITDA for the half year of approximately 14% compared to that of the corresponding 2017 half year period.