3. What is the horizontal arc of the sternlight?(A) 100 degrees.(B) 120 degrees.(C) 135 degrees.(D) 150 degrees.

7. A vessel is seen showing three lights in a vertical line; the top and bottom ones are red andthe middle one is white. What does this night time signals indicate?(A) It is a dredging ship not engaged in operation.(B) It is a vessel at anchor.(C) It is a vessel restricted her ability to manoeuvre.(D) It is a vessel engaged in a mine clearance operation.