Complex sentence: In the early 1970s, an NIS special agent was stationed on the for six months which was the beginning of the "Deployment Afloat" program (now called the Special Agent Afloat program).
Split into simpler sentences: In the early 1970s, an NIS special agent was stationed on the for six months. This was the beginning of the "Deployment Afloat" program (now called the Special Agent Afloat program).