S1:The ship ahead of us seems to have reduced its speed. Third mate, what is our distance from the ship?S2:three miles, captain. Her speed is 11 knots. She has slowed down a bit. We are getting closer to her.S1:Roger. Our speed is 12 knots. Let's reduce our speed, too. Bring down the engine revolution to 75RPM.S2:Roger. Engine revolution bringing down to 75 RPM. Speed will be reduced.S1:Roger. Q1:What has the Captain noticed?