Team racing, also known as team sailing, is a popular form of dinghy racing and yacht racing. Two teams compete in a race, each sailing two to four boats of the same class. The winning team is decided by combining the results of each team's boats. This differs from an inter-club fleet race where boats from three or more clubs compete, with the results of each club's boats combined to determine its overall position.
Team racing employs the low points scoring system. The boat finishing 1st scores 1 point, 2nd scores 2 points, and so on. The points scored by the boats in each team are added together. The team scoring fewest points wins, with additional rules applied to decide ties in the 2 and 4-boat formats.
Short 6 to 10 minute courses are used for team races. One course form is a digital 'S' on its side, sometimes called a digital 'N'. This gives a beat from start and mark to starboard; a short reach and mark to starboard; a run and mark to port; a short reach and mark to port; and a beat to finish. The other form is a starboard (right) hand 'box'. This gives a beat from start/finish; a short reach, a run; a short reach; and a beat to start/finish. These course formats put a premium on racing tactics so that the outcome is not decided by boat speed alone.
On-the-water umpiring is now the norm, since its first introduction in 1987. Boats have the option to do one penalty turn after an infringement. Otherwise they do two penalty turns if they sail on and are penalised by an umpire. The 'Team Racing Companion'.[1] gives an excellent brief exposition of team racing and its required skills. The further reading section at the end of this page lists it and other relevant publications.