Now that is an interesting picture .....

What tack is the windward spinnacker boat on????

The spinnacker indicates a port tack ..... but the boom is on Starboard tack ........?????

The leaward boat is definately on port tack ......

Eric ..... help????

What tack is a boat on when sailing downwind "wing and wing" mode .... what is the major determining factor .... the mainsail/boom?????

Note, as leaward boat I'm just going to stay out of the way ......

Harry