Complex sentence: With a displacement of less than ten tons, "Rap" was very limited in terms of endurance and seaworthiness, and over the next three decades "Rap" would be followed by many other Norwegian torpedo boats of ever-increasing size and complexity.
Split into simpler sentences: With a displacement of less than ten tons, "Rap" was very limited in terms of endurance and seaworthiness. Over the next three decades "Rap" would be followed by many other Norwegian torpedo boats of ever-increasing size and complexity.