Complex sentence: Arriving Subic Bay 28 March, she headed for her "Market Time" station 5 April and remained on patrol preventing the infiltration of arms and men from North Vietnam to the south.
Split into simpler sentences: Arriving Subic Bay on 28 March, she headed for her "Market Time" station on 5 April. There, she patrolled to prevent the infiltration of arms and men from North Vietnam to the south.