(EnergyAsia, August 4) — Singapore’s SembCorp Marine, a builder of rigs and vessels for the offshore industry, said its first half net profit jumped 21.6% to S$58.4 million compared with the same period last year. (US$1=S$1.67). Its net profit excluding the effect of tax write-back in 2004, rose 33.6% from S$43.7 million in the first…