30. At 1715 your position is LAT 41°00.0'N, LONG 72°40.0'W. You are making turns for 15.5 knots. What is your ETA at a position 1.5 miles due south of Stratford Shoal Middle Ground Light?

The ETA is calculated by dividing the charted distance of approximately 20 nautical miles by the vessel's speed of 15.5 knots, resulting in a travel time of approximately 1 hour and 17 minutes, placing the ETA at 1832.