How long takes a yacht to do 690 km?

What was placed across the Sydney harbor to stop submarines getting in? What year is a Yamaha 4 ac outboard motor serial number 6E0-l-342583? 1987 kawasaki 550 jet ski spark plug gap? What is boating certificate of number? What is another name for the submarine? When does a sailboat have the right away over a recreation vesel? What Boating information markers look like? When open roaching mooring buoy what should you do? What sound signal should you hear when a power boat is in fog? What should the compression be on a 9.9 outboard? What was the importance of the steamboat built by John Fitch? How long does it take to boat 100miles? Who owns mega yacht Arthur's way? What should you take on a cruise? What do you call a detailed daily record of a ship's progress? What According to the navigation rules a risk of imminent collision exists in which situation? Will a yellow buoy may mark which of the followingA deep water basinA tidal basinA spoil areaMid channel? How are submarines constructed? How much does storage cost for a boat at Lake Norman in North Carolina? What was the last year 2 stroke outboards were made?