Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Problem:Context : The Type 90 Ship-to-Ship Missile (90, SSM-1B) is a ship-launched anti-ship missile developed by Japan's Mitsubishi Heavy Industries that entered service in 1992.
Question : What year was the service entry date for Type 90 Ship-to-Ship Missile?
Solution:
1992