The city ferry fleet shuttles about 70,000 people a day between Staten Island and Manhattan, a 5.2-mile trip across New York Harbor that takes about 25 minutes.
It takes less than half an hour for a boat to cross 5.2 miles of water
The city ferry fleet takes less than half an hour, but a speedboat could do it in a fraction of that time. A sailboat could take longer. 
( z1 take :ARG0 ( z2 cross :ARG0 ( z3 boat ) :ARG1 ( z4 water :quant ( z5 distance-quantity :quant "5.2" :unit ( z6 mile ) ) ) ) :ARG1 ( z7 less-than :op ( z8 temporal-quantity :quant "0.5" :unit ( z9 hour ) ) ) :ARG2 z3 )