re: [Paddlewise] where's the lead guide?

situation:  you are a guide and assistant guide, doing a classic *lead and 
sweep* on a night paddle with a tour group, and everyone is wearing a light.

problem:  if everyone is wearing a light, how does the group distinguish the 
guide's boat and the assistant guide's boat from all other boats?

strobes are not permissable.  chemical light sticks are not environmentally 
sound.

has anyone encountered this situation and if so, how have you solved it?  
even if you haven't encountered it, do you have any suggestions?

***************************************************************************
PaddleWise Paddling Mailing List - All postings copyright the author and not
to be reproduced outside PaddleWise without author's permission
Submissions:     paddlewise_at_lists.intelenet.net
Subscriptions:   paddlewise-request_at_lists.intelenet.net
Website:         http://www.paddlewise.net/
***************************************************************************