Re: number of people aboard?
length x width / 15=
use this on the average of 150lbs. per person. Then you can safely calculate the correct total weight your boat can carry. Remember most adults are more than 150 so additional figuring wouold be needed.
Remember that just because it says you can carry X amount of people, you can not exeed the total weight allowed.
So it would be 7 people or x lbs. which ever comes first.
I personaly won't carry more 7 people in my 21 footer. Adults/kids, I like my leg room.