How long do you operate a blower before starting an engine on a boat?

If you run your boat or aground what should you do first? What is able to be traveled by boats or ships? Who invented the longships? When operating astern you should sound how many short blasts? Why is driver seat on right side of boat? Was the grand national and the boat race ever on in the same day? When did the Mary Rose rise? How to make a canoe step by step? What should you do to aviod colliding with another vessel? How do you locate the nut to drain oil on a 60 hp 4 stroke mercury outboard? How fast did Magellan's boat travel? Why do sailors sing when they go sailing? What do the individual numbers of a VIN mean? What is the gas oil ratio for a 1975 9.9 evinrude? What does short-shouldered mean? Will a boat sink more in fresh water or salt water? What is a 1999 Redman mobile home in good condition worth? How do you add a mobile home to a deed? What is an average number of rooms on a cruise ship? Capacity plate provides the horsepower rating what does the rating mean?