Complex sentence: ST Engineering announced that the group's marine arm, ST Marine will build the eight vessels at its Singapore Benoi Yard, with the core combat systems and combat system integration solutions being supplied by the group's electronics arm, ST Electronics.
Split into simpler sentences: ST Engineering announced that the group's marine arm, ST Marine will build the eight vessels at its Singapore Benoi Yard. The core combat systems and combat system integration solutions will be supplied by the group's electronics arm, ST Electronics.