Complex sentence: ICMA members employ more than 1,000 port chaplains and many more volunteer personnel, and maintain more than 500 seafarers' centres and other shore-based welfare facilities and services in almost all international sea-and river ports.
Split into simpler sentences: ICMA members employ more than 1,000 port chaplains and many more volunteer personnel. They also maintain more than 500 seafarers' centres and other shore-based welfare facilities and services in almost all international sea-and river ports.