PHRF is a handicapping system that uses the perceived speed potential of a yacht as the basis for a handicap. This handicap is used to determine a winner when different types of sail boat to race against each other, much like a golf handicap for a group of different skilled golfers.
In essence when sailing in a PHRF race your are actually racing against the clock. In order to know if you're winning during a race you have to know everyone else's PHRF rating and then measure the time difference between the sail boats at a known distance from the start line - not an easy task.
All too often sailors have to wait at the Yacht Club until the Race Committee publishes the results in order to find out who won.
PHRFulator, a PHRF Calculator, allows you to build a table of sail boats with different ratings and calculate the time between them at various distances from the start line.