When to use MY and MS for a yacht?

AS you enter a harbor at dusk and see a buoy with number 4 and a flashing red light? What is the stall speed of Cessna 182T at 60 degrees of bank? Which of the following states is not bordered by the Atlantic ocean California Georgia Virginia Delaware? What are 3 types of lifting devices on a rig? You are boating near shore at twilight You see a triangle-shaped daymark You cannot make out the marker's color What color is it? When is it legal to use an inflatable PFD in Iowa? When underway on a boat under 21 feet properly sized PFDs must be worn be children of what age in Maryland? What is the name of the first five masted schooner? What information is usually found on the capacity plate of the powerboat? What is the oil to fuel ratio on a 1975 85HP mercury outboard? How many ballistic missle nuclear submarines does the US have? How much money does it cost to go on a boat into Standedge tunnel? How long does it take to travel from the United Kingdom to the United States by ship? When is a canoe considered a give-way vessel? Are they any other uses for submarine? What year is a Mercury 20 HP outboard serial No 9172772 manufactured in Belgium? What are different types of boats? Why do submarines and airplanes have teardrop shape? What is the function of paddle? What is the purpose of having a safety lanyard on a personal watercraft?