Several Competitors in One Car 

1.  Those sharing a car work as a team until the site is reached.

2.  All may use their sets at the start and at any time throughout the competition. (This only permits an averaging of  bearings, no great advantage is obtained. All then feel involved. For more explanation see note a).

3. If competitors have some experience, then once the ‘on foot phase begins’ they MUST split and compete against each other. The team no longer exists, the others in the car become just  like other competitors and there should be no further communication (except as in note c).  Whenever possible they should do the 'sporting thing' and attempt to find different transmitters first  (the scoring system and jokers encourage people to split up anyway, you are very unlikely to win if you stay with a group).

4. Teams, once separated, have to complete the event on foot. This prevents the driver having an advantage over the others in the initial team. Solo competitors may return to their car and drive to a different entry point to access a distant Tx.  See solo advantage - in note b).

Notes/Explanations
a) Normal rules for traditional events have always allowed one nominated person per team to use one DF set. If we analyse why, it is to stop two people from the same team ‘triangulating’ the Tx when close in and thereby gaining a huge advantage. This makes it an individual sport with navigators and helpers receiving no official reward for their labours and no chance to learn how to use a set. In a Multi-Tx event, since ‘teams’ split and compete against each other on site, there is no need for this restriction during the driving phase of the event.

b) Fairness - Yes two or more in a car may be a slight advantage initially but it has the disadvantage that you cannot return to the car in case of error, or in order to drive to a different part of the site to save running. Teams must be very sure that they are on site before leaving the car and this probably means an extra check bearing compared to a solo competitor (so swings and roundabouts).

c) Disaster recovery. In the very rare event that competitors split and it later becomes obvious that they are not in fact on site then obviously they have no choice but to use mobile phones or whistles to coordinate an ‘escape’. They should continue with the event but admit their blunder when the results are being processed. It is unlikely that any 'use of phone' penalty would be  applied, making the error is penalty enough! With only a 4 minute delay between transmissions the essential check bearings mentioned in b) should not take a huge amount of time and of course means that you start on foot with more information.